Compact models added to
further expand Series
G9ECG9EB G9EA
G9EA/G9EB/G9EC
DC Power Relays
A Leader in Clean Energy with Compact,
Quiet, Energy-efficient Designs
DC Control in a Relay
The G9EA is shown.
DC Power Relays that Interrupt High-capacity
DC Loads and High-voltage DC Circuits
in a Compact, Low-noise Design
DC POWER R E LAY
Magnet:
Arc-containing effect
Gas-filled
construction
(contactor):
Arc-cooling effect
In the endeavors to prevent global warming, air pollution, and the depletion of oil
resources, much attention is being given to increasing the efficiency of AC-to-DC
power conversion and distributed power generation. DC contactors and circuit-
breakers, however, are disadvantaged by their noise and bulk.
OMRON has improved on the standard DC circuit that switches using a contactor or
circuit-breaker by developing the G9EA/G9EB/G9EC DC Power Relay Series. These
Relays enable switching high-voltage and high-capacity loads. The switch's gas-filled
construction allows a considerable reduction in the relay switch size, while also
lowering the operating noise during load switching. Furthermore, the new design has
decreased the power consumption of the coil and achieved long-term contact
stability.
Compared with the same
class (load switching)
of G9EA contactor.
OMRON DC Power Switching
Technologies Space-saving
No arc space needed
Power-saving
30% less power consumption
Compact
70% less volume
Quiet
50% lower operating noise
Safe,
reliable design
*
Smaller and quieter for a variety of DC applications
Automobiles
Hybrid cars, fuel-cell cars, compact electric passenger vehicles, etc.
Special Vehicles
Battery-operated golf carts, forklifts, AGV (automated guided vehicles),
battery-powered agricultural equipment, etc.
Electric Power and Distributed Power Generation
Wind-powered or photovoltaic power generation systems,
fuel-cell cogeneration systems, etc.
General-purpose Industrial Equipment
Inverters, UPS, power supplies, robots, machining centers,
elevators, escalators, medical equipment, testing equipment
(batteries, fuel cells), etc.
Features
Sealed switching
Gas-cooled arc
Magnetic arc control
Applications
DC Power Relays Selection Guide 3
DC Power Relays
Selection Guide
OMRON DC Power Relays Interrupt High-capacity DC Loads while Enabling Compact,
Low-noise, Safe Applications
■List of DC Power Relays
Model G9EA G9EC G9EB
G9EA-1(-B) G9EA-1(-B)-CA G9EC-1(-B) G9EB-1-B
Classification Switching/current
conduction
High-current
conduction
Switching/current
conduction
Switching/current
conduction
Appearance
Features Standard model
Compact, carries/
switches 400-V, 60-A
loads
Carries 100 A
Low contact resistance
when carrying current
Largest capacity in series
Carries/switches 400-V,
200-A loads
Smallest in series
Carries/switches 250-V,
25-A loads
Contacts Contact form SPST-NO
Contact structure Double-break, single
Contact resistance 30 mΩ max.
(0.6 mΩ typical)
10 mΩ max.
(0.3 mΩ typical)
30 mΩ max.
(0.2 mΩ typical)
30 mΩ max.
Switching voltage drop 0.1 V max.
(for a carry current of
60 A)
0.1 V max.
(for a carry current of
100 A)
0.1 V max.
(for a carry current of 200 A)
0.1 V max.
(for a carry current of
25 A)
Electrical endurance 120 VDC, 100 A, 3,000
operations min.
400 VDC, 30 A, 1,000
operations min.
400 VDC, 200 A, 3,000
operations min.
250 VDC, 25 A, 30,000
operations min.
400 VDC, 60 A, 3,000
operations min.
120 VDC, 30 A, 2,500
operations min.
--- ---
400 VDC, 30 A, 30,000
operations min.
--- --- ---
Maximum switching
current
100 A 30 A 200 A 25 A
Rated carry
current
200
180
160
140
120
100
80
60
40
20
Short-time carry cur-
rent
100 A (10 min) 150 A (10 min) 300 A (15 min) 50 A (5 min), 40 A (10 min)
Maximum interruption
current
600 A at 300 VDC
(5 times)
--- 1,000 A at 400 VDC
(10 times)
100 A at 250 VDC
(5 times)
Overload interruption 180 A at 400 VDC
(100 times min.)
100 A at 120 VDC
(150 times min.)
700 A at 400 VDC
(40 times min.)
50 A at 250 VDC
(50 times min.)
Reverse polarity inter-
ruption
−60 A at 200 VDC
(1,000 times min.)
--- −200 A at 200 VDC
(1,000 times min.)
---
Coil Rated voltage 12, 24, 48, 60, and 100 VDC
Power consumption Approx. 5 to 5.4 W Approx. 11 W Approx. 2 W
Mechanical endurance 200,000 operations min. 100,000 operations min.
G9EA-1-B
12VDC
MADE IN JAPAN
CONTACT:
60A 400VDC
Lot No. 1362K1-0001
2(-)1(+)
73
36
67.2
G9EC-1-B
12VDC
MADE IN JAPAN
CONTACT:
200A 400VDC
Lot No. 1362K1-0001
2(-) 1(+)
98
44
86.7
G9EB-1-B
12VDC
MADE IN JAPAN
CONTACT:
25A 250VDC
Lot No. 0424Y1-0001
2
43
1
60
25
58
60 A
100 A
200 A
25 A
4DC Power Relays Selection Guide
Note: 1. The insulation resistance was measured with a 500-VDC megohmmeter.
2. The impulse withstand voltage was measured with a JEC-212 (1981) standard impulse voltage waveform (1.2 × 50 µs).
Insulation
resistance
(See note 2.)
Between coil and
contacts
1,000 MΩ min.
Between contacts of
the same polarity
1,000 MΩ min.
Dielectric
strength
Between coil and
contacts
2,500 VAC, 1 min
Between contacts of
the same polarity
2,500 VAC, 1 min
Impulse withstand voltage
(See note 3.)
4,500 V
Ambient operating temperature −40 to 70°C (with no icing or condensation) −40 to 50°C (with no icing or
condensation)
−40 to 70°C (with no icing
or condensation)
Ambient operating humidity 5% to 85%
Terminals Screw terminals Yes Yes Yes
Lead wire output Yes Yes ---
Weight Approx. 310 g Approx. 560 g Approx. 135 g
Refer to page 5 11 17
Model G9EA G9EC G9EB
G9EA-1(-B) G9EA-1(-B)-CA G9EC-1(-B) G9EB-1-B
Classification Switching/current
conduction
High-current
conduction
Switching/current
conduction
Switching/current
conduction
Appearance
Features Standard model
Compact, carries/
switches 400-V, 60-A
loads
Carries 100 A
Low contact resistance
when carrying current
Largest capacity in series
Carries/switches 400-V,
200-A loads
Smallest in series
Carries/switches 250-V,
25-A loads
G9EA-1-B
12VDC
MADE IN JAPAN
CONTACT:
60A 400VDC
Lot No. 1362K1-0001
2(-)1(+)
73
36
67.2
G9EC-1-B
12VDC
MADE IN JAPAN
CONTACT:
200A 400VDC
Lot No. 1362K1-0001
2(-) 1(+)
98
44
86.7
G9EB-1-B
12VDC
MADE IN JAPAN
CONTACT:
25A 250VDC
Lot No. 0424Y1-0001
2
43
1
60
25
58
DC Power Relays (60-A, 100-A Models) G9EA-1 5
DC Power Relays (60-A, 100-A Models)
G9EA-1
DC Power Relays Capable of Interrupting
High-voltage, High-current Loads
• A compact relay (73 x 36 x 67.2 mm (L x W x H)) capable of
switching 400-V 60-A DC loads. (Capable of interrupting 600 A
at 300 VDC max.)
• The switching section and driving section are gas-injected and
hermetically sealed, allowing these compact relays to interrupt
high-capacity loads. The sealed construction also requires no
arc space, saves space, and helps ensure safe applications.
• Downsizing and optimum design allow no restrictions on the
mounting direction.
• Terminal Cover and DIN Track Adapters are also available for in-
dustrial applications.
• UL/CSA standard UL508 approved.
Note: Refer to Precautions on page 22.
Model Number Structure
■Model Number Legend
1. Number of Poles
1: 1 pole
2. Contact Form
Blank: SPST-NO
3. Coil Terminals
B: M3.5 screw terminals
Blank: Lead wire output
4. Special Functions
CA: High-current conduction (100 A)
Ordering Information
■List of Models
Note: 1. Two M5 screws are provided for the contact terminal connection.
2. Two M3.5 screws are provided for the coil terminal connection.
12 34
G9EA-@-@-@-@
Models Terminals Contact form Rated coil voltage Model
Coil terminals Contact terminals
Switching/current con-
duction models
Screw terminals (See note 2.) Screw terminals
(See note 1.)
SPST-NO 12 VDC
24 VDC
48 VDC
60 VDC
100 VDC
G9EA-1-B
Lead wires G9EA-1
High-current conduc-
tion models
Screw terminals (See note 2.) G9EA-1-B-CA
Lead wires G9EA-1-CA
6DC Power Relays (60-A, 100-A Models) G9EA-1
Specifications
■Ratings
Coil
Note: 1. The figures for the rated current and coil resistance are for a coil temperature of 23°C and have a tolerance of ±10%.
2. The figures for the operating characteristics are for a coil temperature of 23°C.
3. The figure for the maximum voltage is the maximum voltage that can be applied to the relay coil.
Contacts
■ Characteristics
Note: 1. The above values are initial values at an ambient temperature of 23°C unless otherwise specified.
2. The contact resistance was measured with 1 A at 5 VDC using the voltage drop method.
3. The insulation resistance was measured with a 500-VDC megohmmeter.
4. The impulse withstand voltage was measured with a JEC-212 (1981) standard impulse voltage waveform (1.2 × 50 µs).
5. The mechanical endurance was measured at a switching frequency of 3,600 operations/hr.
6. The electrical endurance was measured at a switching frequency of 60 operations/hr.
Rated voltage Rated current Coil resistance Must-operate
voltage
Must-release
voltage
Maximum voltage
(See note 3.)
Power
consumption
12 VDC 417 mA 28.8 Ω75% max. of rated
voltage
8% min. of rated
voltage
130% of rated volt-
age (at 23°C within
10 minutes)
Approx. 5 W
24 VDC 208 mA 115.2 Ω
48 VDC 102 mA 469.3 Ω
60 VDC 86.2 mA 695.7 ΩApprox. 5.2 W
100 VDC 53.6 mA 1,864 ΩApprox. 5.4 W
Item Resistive load
G9EA-1(-B) G9EA-1(-B)-CA
Rated load 60 A at 400 VDC, 100 A at 120 VDC 30 A at 400 VDC
Rated carry current 60 A 100 A
Maximum switching voltage 400 V 400 V
Maximum switching current 100 A 30 A
Item G9EA-1(-B) G9EA-1(-B)-CA
Contact resistance (See note 2.) 30 mΩ max. (0.6 mΩ typical) 10 mΩ max. (0.3 mΩ typical)
Contact voltage drop 0.1 V max.
(for a carry current of 60 A)
0.1 V max.
(for a carry current of 100 A)
Operate time 50 ms max.
Release time 30 ms max.
Insulation resistance
(See note 3.)
Between coil and contacts 1,000 MΩ min.
Between contacts of the same polarity 1,000 MΩ min.
Dielectric strength Between coil and contacts 2,500 VAC, 1 min
Between contacts of the same polarity 2,500 VAC, 1 min
Impulse withstand voltage (See note 4.) 4,500 V
Vibration resistance Destruction 10 to 55 to 10 Hz, 0.75-mm single amplitude (Acceleration: 2.94 to 88.9 m/s2)
Malfunction 10 to 55 to 10 Hz, 0.75-mm single amplitude (Acceleration: 2.94 to 88.9 m/s2)
Shock resistance Destruction 490 m/s2
Malfunction 196 m/s2
Mechanical endurance (See note 5.) 200,000 ops. min.
Electrical endurance (See note 6.) 120 VDC, 100 A, 3,000 ops. min. 400 VDC, 30 A, 1,000 ops. min.
400 VDC, 60 A, 3,000 ops. min. 120 VDC, 30 A, 2,500 ops. min.
400 VDC, 30 A, 30,000 ops. min. ---
Short-time carry current 100 A (10 min) 150 A (10 min)
Maximum interruption current 600 A at 300 VDC (5 times) ---
Overload interruption 180 A at 400 VDC (100 times min.) 100 A at 120 VDC (150 times min.)
Reverse polarity interruption −60 A at 200 VDC (1,000 times min.) ---
Ambient operating temperature −40 to 70°C (with no icing or condensation)
Ambient operating humidity 5% to 85%
Weight Approx. 310 g
DC Power Relays (60-A, 100-A Models) G9EA-1 7
Engineering Data
■G9EA-1(-B) Switching/Current Conduction Models
■G9EA-1(-B)-CA High-current Conduction Models
Carry current (A)
Energizing time (s)
Carry Current vs Energizing
Time
30 5010 100 300 500 1,000
100,000
10,000
1,000
100
10
1
10,000
5,000
3,000
1,000
500
300
10
5
1
3
100
50
30
30 5010 100 300 500 1,00030 5010 100 300 500 1,000
10
5
3
1
0.5
0.3
0.1
0.05
0.03
0.01
Switching voltage (V)
Switching current (A)
Electrical Endurance
(Switching Performance)
Operations
Operations (x 10,000)
Switching 120-VDC resistive
load (positive direction)
Interrupting 400-VDC resistive
load (positive direction)
Switching current (A)
Electrical Endurance
(Interruption Performance)
Switching current (A)
Maximum Switching
Capacity
1,000
500
300
100
50
30
10
5
3
130 5010 100 300 500 1,000
G9EA-1
DC resistive load
Switching
400-VDC
resistive load
(positive direction)
Carr
y
current
(
A
)
Energizing time (s)
Carry Current vs
Energizing Time
30 5010 100 300 500 1,000
10,000
5,000
3,000
1,000
500
300
100
50
30
10
1,000
500
300
100
50
30
10
5
3
130 5010 100 300 500 1,000
G9EA-1-CA
DC resistive load
Switching voltage (V)
Contact current (A)
Electrical Endurance
(Switching Performance)
Operations
Switching 120-VDC resistive
load (positive direction)
Switching current (A)
Maximum Switching
Capacity
30 5010 100 300 500 1,000
100,000
10,000
1,000
100
10
1
8DC Power Relays (60-A, 100-A Models) G9EA-1
■All G9EA-1 Models
Single amplitude (mm)
Frequency (Hz)
Vibration Malfunction
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
110305053 100
20
15
10
5
0 5.0 10.0 15.0 20.0 25.0 30.0
30
25
20
15
10
5
0 20 40 60 80 100
Number of contacts
Number of Relays
Percentage of rated voltage (%) Time (ms)
Must-operate voltage
Must-release voltage
Sample: G9EA-1
Number: 35
Must-operate Voltage and
Must-release Voltage
Distributions
Time Characteristic
Distributions
Sample: G9EA-1
Number: 35
Operate time
Release time
Sample: G9EA-1
Number: 5 Unconfirmed area
Confirmed area
Z'
Z
Y
Y'
X
X'
1,000
1,000
800
600
400
200
200
400
600
800
The value at which malfunction occurred was
measured after applying shock to the test piece
3 times each in 6 directions along 3 axes.
Y
10.0
8.0
6.0
4.0
2.0
0.0
−2.0
−4.0
−6.0
−8.0
−10.0
Characteristics were measured after applying a shock
of 490 m2/s to the test piece 3 times each in 6 directions
along 3 axes. The percentage rate of change is the
average value for all of the samples.
10.0
8.0
6.0
4.0
2.0
0.0
−2.0
−4.0
−6.0
−8.0
−10.0
Characteristics were measured after applying vibration
at a frequency of 10 to 55 Hz (single amplitude of 0.75
mm) to the test piece (not energized) for 2 hours each
in 3 directions. The percentage rate of change is the
average value for all of the samples
Rate of change (%)
Sample: G9EA-1
Number: 5
Must-release voltage
Must-operate voltage
Start After test
Vibration Resistance Shock Malfunction Shock Resistance
Rate of change (%)
Sample: G9EA-1
Number: 5
Unit: m/s2
Energized
Deenergized
Sample: G9EA-1
Number: 5
Must-operate voltage
Must-release voltage
Start After test
Y' YX'
X
Z
Z'
DC Power Relays (60-A, 100-A Models) G9EA-1 9
Dimensions
Note: All units are in millimeters unless otherwise indicated.
Models with Screw Terminals
G9EA-1-B(-CA)
Models with Lead Wires
G9EA-1(-CA)
G9EA-1-B
12VDC
MADE IN JAPAN
CONTACT:
60A 400VDC
Lot No. 1362K1-0001
2(-) 1(+)
17.5
2
15.3
36
24
61
73
47
10.5
67.2
15.2
24±0.1
61±0.1
1(+)
2(−)
78
39.7
(Coil terminal
height)
Two, M5
Two, M3.5 screws
60.7
(Terminal height)
Terminal Arrangement/
Internal Connections
Note: Be sure to connect terminals with the
correct polarity. Coils do not have polarity.
Two, M6 or 6.5-dia. holes
(TOP VIEW)
Mounting Hole Dimensions
(TOP VIEW)
Two, 6.2-dia. holes
G9EA-1-B
12VDC
MADE IN JAPAN
CONTACT:
60A 400VDC
Lot No. 1362K1-0001
2(-) 1(+)
Dimension (mm) Tolerance (mm)
10 or lower ±0.3
10 to 50 ±0.5
50 or higher ±1
G9EA-1
12VDC
MADE IN JAPAN
CONTACT:
60A 400VDC
Lot No. 1362K1-0001
2(-) 1(+)
78
17.5
2
15.3
3624
61
73
47
10.5
67.2
15.2 (10) 230±20
24±0.1
61±0.1
1 (+)
2 (−)
78
Two, M5
60.7
(Terminal height)
Terminal Arrangement/
Internal Connections
Note: Be sure to connect terminals with the
correct polarity. Coils do not have polarity.
Two, 6.2-dia. holes
(TOP VIEW)
Mounting Hole Dimensions
(TOP VIEW)
Two, M6 or 6.5-dia. holes
G9EA-1
12VDC
MADE IN JAPAN
CONTACT:
60A 400VDC
Lot No. 1362K1-0001
2(-) 1(+)
Dimension (mm) Tolerance (mm)
10 or lower ±0.3
10 to 50 ±0.5
50 or higher ±1
10 DC Power Relays (60-A, 100-A Models) G9EA-1
■Options
Terminal Cover
P9EA-C
DIN Track Adapter
P9EA-D
* Dimensions of cutouts for wiring.
49
6
21
363117*
17*17*
13.2*
>PC<
>PC<
>PC<
P9EA-C
P9EA-C
MADE IN JAPAN
MADE IN JAPAN
>PC<
P9EA-C
MADE IN JAPAN
P9EA-C
MADE IN JAPAN
Dimension (mm) Tolerance (mm)
10 or lower ±0.3
10 to 50 ±0.5
50 or higher ±1
Note: Be sure to remove the cutouts
for wiring that are located in
the wiring outlet direction be-
fore installing the Terminal
Cover.
Two, M5
50
24±
0.1
12
P9EA-D
61±
0.1
88
Dimension (mm) Tolerance (mm)
10 or lower ±0.3
10 to 50 ±0.5
50 or higher ±1
DC Power Relays (200-A Models) G9EC-1 11
DC Power Relays (200-A Models)
G9EC-1
DC Power Relays Capable of Interrupting
High-voltage, High-current Loads
• A compact relay (98 x 44 x 86.7 mm (L x W x H)) capable of
switching 400-V 200-A DC loads. (Capable of interrupting
1,000 A at 400 VDC max.)
• The switching section and driving section are gas-injected and
hermetically sealed, allowing these compact relays to interrupt
high-capacity loads. The sealed construction also requires no
arc space, saves space, and helps ensure safe applications.
• Downsizing and optimum design allow no restrictions on the
mounting direction.
• Terminal Cover is also available for industrial applications.
• UL/CSA standard UL508 approved.
Note: Refer to Precautions on page 22.
Model Number Structure
■Model Number Legend
1. Number of Poles
1: 1 pole
2. Contact Form
Blank: SPST-NO
3. Coil Terminals
B: M3.5 screw terminals (standard)
Blank: Lead wire output
4. Special Functions
Ordering Information
■List of Models
Note: 1. Two M8 nuts are provided for the contact terminal connection.
2. Two M3.5 screws are provided for the coil terminal connection.
12 34
G9EC-@-@-@-@
Models Terminals Contact form Coil rated voltage Model
Coil terminals Contact terminals
Switching/current con-
duction models
Screw terminals (See note 2.) Screw terminals
(See note 1.)
SPST-NO 12 VDC
24 VDC
48 VDC
60 VDC
100 VDC
G9EC-1-B
Lead wire G9EC-1
12 DC Power Relays (200-A Models) G9EC-1
Specifications
■Ratings
Coil
Note: 1. The figures for the rated current and coil resistance are for a coil temperature of 23°C and have a tolerance of ±10%.
2. The figures for the operating characteristics are for a coil temperature of 23°C.
3. The figure for the maximum voltage is the maximum voltage that can be applied to the relay coil.
Contacts
■ Characteristics
Note: 1. The above values are initial values at an ambient temperature of 23°C unless otherwise specified.
2. The contact resistance was measured with 1 A at 5 VDC using the voltage drop method.
3. The insulation resistance was measured with a 500-VDC megohmmeter.
4. The impulse withstand voltage was measured with a JEC-212 (1981) standard impulse voltage waveform (1.2 × 50 µs).
5. The mechanical endurance was measured at a switching frequency of 3,600 operations/hr.
6. The electrical endurance was measured at a switching frequency of 60 operations/hr.
Rated voltage Rated current Coil resistance Must-operate
voltage
Must-release
voltage
Maximum voltage
(See note 3.)
Power
consumption
12 VDC 938 mA 12.8 Ω75% max. of rated
voltage
8% min. of rated
voltage
110% of rated volt-
age (at 23°C within
10 minutes)
Approx. 11 W
24 VDC 469 mA 51.2 Ω
48 VDC 234 mA 204.8 Ω
60 VDC 188 mA 320.0 Ω
100 VDC 113 mA 888.9 Ω
Item Resistive load
G9EC-1(-B)
Rated load 200 A at 400 VDC
Rated carry current 200 A
Maximum switching voltage 400 V
Maximum switching current 200 A
Item G9EC-1(-B)
Contact resistance (See note 2.) 30 mΩ max. (0.2 mΩ typical)
Contact voltage drop 0.1 V max. (for a carry current of 200 A)
Operate time 50 ms max.
Release time 30 ms max.
Insulation resistance
(See note 3.)
Between coil and contacts 1,000 MΩ min.
Between contacts of the same polarity 1,000 MΩ min.
Dielectric strength Between coil and contacts 2,500 VAC, 1 min
Between contacts of the same polarity 2,500 VAC, 1 min
Impulse withstand voltage (See note 4.) 4,500 V
Vibration resistance Destruction 10 to 55 to 10 Hz 0.75-mm single amplitude (Acceleration: 2.94 to 88.9 m/s2)
Malfunction 10 to 55 to 10 Hz 0.75-mm single amplitude (Acceleration: 2.94 to 88.9 m/s2)
Shock resistance Destruction 490 m/s2
Malfunction 196 m/s2
Mechanical endurance (See note 5.) 200,000 operations min.
Electrical endurance (resistive load) (See note 6.) 400 VDC, 200 A, 3,000 operations min.
Short-time carry current 300 A (15 min)
Maximum interruption current 1,000 A at 400 VDC (10 times)
Overload interruption 700 A at 400 VDC (40 times min.)
Reverse polarity interruption −200 A at 200 VDC (1,000 times min.)
Ambient operating temperature −40 to 50°C (with no icing or condensation)
Ambient operating humidity 5% to 85%
Weight Approx. 560 g
DC Power Relays (200-A Models) G9EC-1 13
Engineering Data
■G9EC-1(-B) Switching/Current Conduction Models
30
25
20
15
10
5
010 20 30 40 50 60 70 80
Carry current (A)
Energizing time (s)
Carry Current vs Energizing
Time
30
25
20
15
10
5
0
0.0 2.0 4.0 6.0 8.0 10.0 12.0 16.014.0 18.0
1,000
500
300
100
50
30
10
5
3
1
0.5
0.3
0.1
30 5010 100 300 500 1,000
Switching voltage (V)
Switching current (A)
Electrical Endurance
(Switching Performance)
Operations
Operations (x 10,000)
Switching 400-VDC resistive
load (positive direction)
Switching current (A)
Electrical Endurance
(Interruption Performance)
Switching current (A)
Maximum Switching
Capacity
Release time
Number of contacts
Number of Relays
Percentage of rated voltage (%) Time (ms)
Must-operate voltage
Must-release voltage
Sample: G9EC-1
Number: 35
Operate time
Must-operate Voltage and
Must-release Voltage
Distributions
Time Characteristic
Distributions
DC resistive load
30 5010 100 300 500 1,000
10
5
3
1
0.5
0.3
0.1
0.05
0.03
0.01 1005010 1,000500 10,000
1,000
500
300
100
50
30
10
5
3
1
Switching
400-VDC
resistive load
(positive direction)
Interrupting
400-VDC
resistive load
(positive direction)
100 300 500 700 1,000
100,000
10,000
1,000
100
10
Sample: G9EC-1
Number: 32
14 DC Power Relays (200-A Models) G9EC-1
5.0
4.0
3.0
2.0
1.0
0.0
−1.0
−2.0
−3.0
−4.0
−5.0
Single amplitude (mm)
Frequency (Hz)
Vibration Malfunction
5.0
4.0
3.0
2.0
1.0
0.0
−1.0
−2.0
−3.0
−4.0
−5.0
Z'
Z
Y
Y'
X
X'
1,000
1,000
800
600
400
200
200
400
600
800
Rate of change (%)
Must-operate voltage
Start After test
Vibration Resistance
Shock Malfunction Shock Resistance
Rate of change (%)
Sample: G9EC-1
Number: 5
Unit: m/s2
Energized
Deenergized
Sample: G9EC-1
Number: 5
Must-operate voltage
Must-release voltage
Start After test
Sample: G9EC-1
Number: 5
The value at which malfunction occurred was
measured after applying shock to the test piece
3 times each in 6 directions along 3 axes.
Characteristics were measured after applying a shock
of 490 m2/s to the test piece 3 times each in 6 directions
along 3 axes. The percentage rate of change is the
average value for all of the samples.
Characteristics were measured after applying vibration
at a frequency of 10 to 55 Hz (single amplitude of 0.75
mm) to the test piece (not energized) for 2 hours each
in 3 directions. The percentage rate of change is the
average value for all of the samples
Must-release voltage
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
110305053 100
Confirmed area
Unconfirmed area
Sample: G9EC-1
Number: 5
G9EC-1-B
12VDC
MADE IN JAPAN
CONTACT:
200A 400VDC
Lot No. 1362K1-0001
2(-)1(+)
Y' X'
X
Z
Z'
Y
DC Power Relays (200-A Models) G9EC-1 15
Dimensions
Note: All units are in millimeters unless otherwise indicated.
Models with Screw Terminals
G9EC-1-B
Models with Lead Wires
G9EC-1
G9EC-1-B
12VDC
MADE IN JAPAN
CONTACT:
200A 400VDC
Lot No. 1362K1-0001
2(-) 1(+)
78
28.6
2
72
98
86
4432
86.7
26.7
10.5
26 Two, M8 nuts
32±0.1
86±0.1
Two, M6 or 6.5-dia. holes
1(+)
2(−)
78
7
44.2
(Coil terminal
height)
Two, M3.5 screws
68.6
(Terminal
height)
Terminal Arrangement/
Internal Connections
Note: Be sure to connect terminals with the
correct polarity. Coils do not have polarity.
Two, 6.2-dia. holes
(TOP VIEW)
Mounting Hole Dimensions
(TOP VIEW)
G9EC-1-B
12VDC
MADE IN JAPAN
CONTACT:
200A 400VDC
Lot No. 1362K1-0001
2(-) 1(+)
Dimension (mm) Tolerance (mm)
10 or lower ±0.3
10 to 50 ±0.5
50 or higher ±1
G9EC-1
12VDC
MADE IN JAPAN
CONTACT:
200A 400VDC
Lot No. 1362K1-0001
2(-) 1(+)
78
28.6
86.7
26
2
72
98
86
4432
26.7
(10) 230±20
10.5
32±0.1
86±0.1
1(+)
2(−)
78
Terminal Arrangement/
Internal Connections
Note: Be sure to connect terminals with the
correct polarity. Coils do not have polarity.
Two, 6.2-dia. holes
(TOP VIEW)
Mounting Hole Dimensions
(TOP VIEW)
68.6
(Terminal
height)
Two, M8 nuts Two, M6 or 6.5-dia. holes
G9EC-1-B
12VDC
MADE IN JAPAN
CONTACT:
200A 400VDC
Lot No. 1362K1-0001
2(-) 1(+)
Dimension (mm) Tolerance (mm)
10 or lower ±0.3
10 to 50 ±0.5
50 or higher ±1
16 DC Power Relays (200-A Models) G9EC-1
■Options
Terminal Cover
P9EC-C
Dimensions of cutout for wiring.
>PC<
>PC<
P9EC-C
P9EC-C
MADE IN JAPAN
MADE IN JAPAN
>PC<
P9EC-C
MADE IN JAPAN
P9EC-C
MADE IN JAPAN
MADE IN JAPAN
>PC<
>PC<
P9EC-C
MADE IN JAPAN
>PC<
20
30
18
44
27
38
28
74
44
18
28
Dimension (mm) Tolerance (mm)
10 or lower ±0.3
10 to 50 ±0.5
50 or higher ±1
Note: Be sure to remove the cutouts
for wiring that are located in the
wiring outlet direction before in-
stalling the Terminal Cover.
DC Power Relays (25-A Models) G9EB-1 17
DC Power Relays (25-A Models)
G9EB-1
DC Power Relays Capable of Interrupting
High-voltage, High-current DC Load
• Utilizes a unique gas-filled, fully sealed, non-ceramic construc-
tion achieved by using resin with a metal case. This reduces the
need for special processing and materials that were required
with previous models, resulting in a low-cost relay that is both
compact and lightweight.
• Smallest and lightest in its class at 25 × 60 × 58 mm and approx-
imately 135 g. This is approximately half the volume and a third
of the weight of other DC Power Relays in the same class (400
VDC, 25 A).*
• The unique design of the contact switching component and per-
manent magnet for blowing out the arc eliminates the need for
polarity in the main circuit (contact terminal). This improves
ease of wiring and installation, and contributes to providing fail-
safe measures against incorrect wiring.
* Based on our investigation as of December 2004.
Note: Refer to Precautions on page 22.
Model Number Structure
■Model Number Legend
1. Number of Poles
1: 1 pole
2. Contact Form
Blank: SPST-NO
3. Coil Terminals
B: M4 screw terminals
4. Special Functions
Ordering Information
■List of Models
Note: 1. Two M4 screws are provided for the contact terminal connection.
2. Two M4 screws are provided for the coil terminal connection.
12 34
G9EB-@-@-@-@
Models Terminals Contact form Coil rated voltage Model
Coil terminals Contact terminals
Switching/current con-
duction models
Screw terminals (See note 2.) Screw terminals
(See note 1.)
SPST-NO 12 VDC
24 VDC
48 VDC
60 VDC
100 VDC
G9EB-1-B
18 DC Power Relays (25-A Models) G9EB-1
Specifications
■Ratings
Coil
Note: 1. The figures for the rated current and coil resistance are for a coil temperature of 23°C and have a tolerance of ±10%.
2. The figures for the operating characteristics are for a coil temperature of 23°C.
3. The figure for the maximum voltage is the maximum voltage that can be applied to the relay coil.
Contacts
■ Characteristics
Note: 1. The above values are initial values at an ambient temperature of 23°C unless otherwise specified.
2. The contact resistance was measured with 1 A at 5 VDC using the voltage drop method.
3. The insulation resistance was measured with a 500-VDC megohmmeter.
4. The impulse withstand voltage was measured with a JEC-212 (1981) standard impulse voltage waveform (1.2 × 50 µs).
5. The mechanical endurance was measured at a switching frequency of 3,600 operations/hr.
6. The electrical endurance was measured at a switching frequency of 60 operations/hr.
7. These values are for when a varistor is used as the protective circuit against reverse surge in the relay coil. Using a diode will reduce the
switching characteristics.
Rated voltage Rated current Coil resistance Must-operate
voltage
Must-release
voltage
Maximum voltage
(See note 3.)
Power
consumption
12 VDC 166.7 mA 72 Ω75% max. of rated
voltage
10% min. of rated
voltage
130% of rated volt-
age (at 23°C within
10 minutes)
Approx. 2 W
24 VDC 83.3 mA 288 Ω
48 VDC 41.7 mA 1,152 Ω
60 VDC 33.3 mA 1,800 Ω
100 VDC 20 mA 5,000 Ω
Item Resistive load
G9EB-1(-B)
Rated load 25 A at 250 VDC
Rated carry current 25 A
Maximum switching voltage 250 V
Maximum switching current 25 A
Item G9EB-1-B
Contact resistance (See note 2.) 30 mΩ max.
Contact voltage drop 0.1 V max. (for a carry current of 25 A)
Operate time 30 ms max.
Release time 15 ms max.
Insulation resistance
(See note 3.)
Between coil and contacts 1,000 MΩ min.
Between contacts of the same polarity 1,000 MΩ min.
Dielectric strength Between coil and contacts 2,500 VAC, 1 min
Between contacts of the same polarity 2,500 VAC, 1 min
Impulse withstand voltage (See note 4.) 4,500 V
Vibration resistance Destruction 10 to 55 to 10 Hz, 0.75-mm single amplitude (Acceleration: 2.94 to 88.9 m/s2)
Malfunction 10 to 55 to 10 Hz, 0.75-mm single amplitude (Acceleration: 2.94 to 88.9 m/s2)
Shock resistance Destruction 490 m/s2
Malfunction 100 m/s2
Mechanical endurance (See note 5.) 100,000 operations min.
Electrical endurance (resistive load) (See note 6 and 7.) 250 VDC, 25 A, 30,000 ops. min.
Short-time carry current 50 A (5 min), 40 A (10 min)
Maximum interruption current (See note 7.) 100 A at 250 VDC (5 times)
Overload interruption (See note 7.) 50 A at 250 VDC (50 times min.)
Ambient operating temperature −40 to 70°C (with no icing or condensation)
Ambient operating humidity 5% to 85%
Weight (including accessories) Approx. 135 g
DC Power Relays (25-A Models) G9EB-1 19
Engineering Data
■G9EB-1-B Switching/Current Conduction Models
Carry current (A)
Energizing time (s)
Carry Current vs Energizing
Time
Sample: G9EB-1-B
12 VDC
Number: 50
30
25
20
15
10
5
010 20 30 40 50 60
Switching voltage (V)
Switching current (A)
Electrical Endurance
(Switching Performance)
Operations
Operations (x 10,000)
Switching current (A)
Electrical Endurance
(Interruption Performance)
Switching current (A)
Number of contacts
Number of Relays
Percentage of rated voltage (%) Time (ms)
Must-operate voltage
Must-release voltage
Must-operate Voltage and
Must-release Voltage
Distributions
Time Characteristic
Distributions
100
50
30
10
5
3
1
30 5010 100 300 500 1,000
DC resistive load
Maximum Switching
Capacity
Switching 250-VDC
resistive load
30 5010 100 300 500 1,000
100
50
30
10
5
3
1
0.5
0.3
0.1
Interrupting 250-VDC
resistive load
10030 5010 300 500 1,000
1,000
500
300
100
50
30
10
5
3
1
10 30 50 100 500300 1,000
100,000
10,000
30,000
50,000
1,000
3,000
5,000
100
300
500
Sample: G9EB-1-B
12 VDC
Number: 50
60
50
40
30
20
10
048121620
Release time
Operate time
20 DC Power Relays (25-A Models) G9EB-1
Single amplitude (mm)
Frequency (Hz)
Vibration Malfunction
Z'
Y'
X'
Rate of change (%)
Start After test
Vibration Resistance
Shock Malfunction Shock Resistance
Rate of change (%)
Energized
Deenergized
Start After test
The value at which malfunction occurred was
measured after applying shock to the test piece
3 times each in 6 directions along 3 axes.
Characteristics were measured after applying a shock
of 490 m2/s to the test piece 3 times each in 6 directions
along 3 axes. The percentage rate of change is the
average value for all of the samples.
Characteristics were measured after applying vibration
at a frequency of 10 to 55 Hz (single amplitude of 0.75
mm) to the test piece (not energized) for 2 hours each
in 3 directions. The percentage rate of change is the
average value for all of the samples
Y' X'
Z'
Sample: G9EB-1-B 12 VDC
Number: 5
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
110305053 100
Unconfirmed area
Confirmed area
5.0
4.0
3.0
2.0
1.0
0.0
−1.0
−2.0
−3.0
−4.0
−5.0
Sample: G9EB-1-B 12 VDC
Number: 5
Must-operate voltage
Must-release voltage
0
Z
Y
X
200
200
150
100
50
50
100
150
Unit: m/s2
Sample: G9EB-1-B
12 VDC
Number: 5
G9EB-1-B
12VDC
MADE IN JAPAN
CONTACT:
25A 250VDC
Lot No. 0424Y1-0001
2
43
1
Y
X
Z
5.0
4.0
3.0
2.0
1.0
0.0
−1.0
−2.0
−3.0
−4.0
−5.0
Sample: G9EB-1-B 12 VDC
Number: 5
Must-operate voltage
Must-release voltage
DC Power Relays (25-A Models) G9EB-1 21
Dimensions
Note: All units are in millimeters unless otherwise indicated.
Screw Terminal Type
G9EB-1-B
Two, M4
Two, 4.5 dia.
G9EB-1-B
12VDC
MADE IN JAPAN
CONTACT:
25A 250VDC
Lot No. 0424Y1-0001
2
43
1
G9EB-1-B
12VDC
MADE IN JAPAN
CONTACT:
25A 250VDC
Lot No. 0424Y1-0001
2
4
1
3
18
8
60
1.2
25
52
18.7
40
58
50
(Mounting hole
dimensions)
13
(Mounting hole dimensions)
49.2
(Coil M4 screw
dimensions)
12.6
(Coil M4 screw
dimensions)
50±
0.1
13±
0.1
Two, M4 or 4.8-dia. holes
23
4
1
Two, M4
Terminal Arrangement/
Internal Connections
(TOP VIEW)
Mounting Hole Dimensions
(TOP VIEW)
Dimension (mm) Tolerance (mm)
10 or lower ±0.3
10 to 50 ±0.5
50 or higher ±1
22 DC Power Relay Common Precautions
Precautions
■Precautions for Correct Use
Refer to the relevant catalog for common precautions.
1. Be sure to tighten all screws to the appropriate torque given
below. Loose screws may result in burning due to abnormal heat
generation during energization.
•M8 screws: 8.82 to 9.80 N·m
•M6 screws: 3.92 to 4.90 N·m
•M5 screws: 1.57 to 2.35 N·m
•M4 screws: 0.98 to 1.37 N·m
•M3.5 screws: 0.75 to 1.18 N·m
2. The G9EA and G9EC Relays’ contacts have polarity. Be sure to
perform connections with the correct polarity. If the contacts are
connected with the reverse polarity, the switching characteristics
specified in this document cannot be assured.
3. Do not drop or disassemble this Relay. Not only may the Relay fail
to meet the performance specifications, it may also result in dam-
age, electric shock, or burning.
4. Do not use these Relays in strong magnetic fields of 800 A/m or
higher (e.g., near transformers or magnets). The arc discharge
that occurs during switching may be bent by the magnetic field,
resulting in flashover or insulation faults.
5. This Relay is a device for switching high DC voltages. If it is used
for voltages exceeding the specified range, it may not be possible
to interrupt the load and burning may result. In order to prevent
fire spreading, use a configuration in which the current load can
be interrupted in the event of emergencies.
In order to ensure safety of the system, replace the Relay on a
regular basis.
6. If the Relay is used for no-load switching, the contact resistance
may increase and so confirm correct operation under the actual
operating conditions.
7. These Relays contain pressurized gas. Even in applications with
low switching frequencies, the ambient temperature and heat
caused by arc discharge in the contacts may allow permeation of
the sealed gas, resulting in arc interruption failure.
In order to ensure safety of the system, replace Relays on a regu-
lar basis.
8. Do not use or store the Relay in a vacuum. Doing so will acceler-
ate deterioration of the sealing.
9. With this Relay, if the rated voltage (or current) is continuously
applied to the coil and contacts, and then turned OFF and imme-
diately ON again, the coil temperature, and consequently the coil
resistance, will be higher than usual. This means that the must
operate voltage will also be higher than usual, exceeding the
rated value (“hot start”). In this case, take the appropriate counter-
measures, such as reducing the load current or restricting the
energizing time or ambient operating temperature.
10.The ripple percentage for DC relays can cause fluctuations in the
must-operate voltage or humming. For this reason, reduce the rip-
ple percentage in full-wave rectified power supply circuits by add-
ing a smoothing capacitor. Ensure that the ripple percentage is
less than 5%.
11.Ensure that a voltage exceeding the specified maximum voltage
is not continuously applied to the coil. Abnormal heating in the coil
may shorten the lifetime of the insulation coating.
12.Do not use the Relay at a switching voltage or current greater
than the specified maximum values. Doing so may result in arc
discharge interruption failure or burning due to abnormal heating
in the contacts.
13.The contact ratings are for resistive loads. The electrical endur-
ance with inductive loads is inferior to that of resistive loads. Con-
firm correct operation under the actual operating conditions.
14.Do not use the Relay in locations where water, solvents, chemi-
cals, or oil may come in contact with the case or terminals. Doing
so may result in deterioration of the case resin or abnormal heat-
ing due to corrosion or contamination of the terminals. Also, if
electrolyte adheres to the output terminals, electrolysis may occur
between the output terminals, resulting in corrosion of the termi-
nals or wiring disconnections.
15.Be sure to turn OFF the power and confirm that there is no resid-
ual voltage before replacing the Relay or performing wiring.
16.The distance between crimp terminals or other conductive parts
will be reduced and insulation properties will be lowered if wires
are laid in the same direction from the contact terminals. Use
insulating coverings, do not wire in the same direction, and take
other measures as required to maintain insulation properties.
17.Use either a varistor, or a diode plus Zener diode as a protective
circuit against reverse surge in the relay coil. Using a diode alone
will reduce the switching characteristics.
18.Be sure to use the screws provided with the product for wiring coil
terminals and contact terminals. The specified tightening torque
cannot be achieved with different screws and may result in abnor-
mal heat generation when energized.
Recommended Wire Size
Note: Use flexible leads.
Take measures to prevent contact with charged parts
when using the Relay for high voltages.
WARNING
Model Size
G9EA-1(-B) 14 to 22 mm2
G9EA-1(-B)-CA 22 to 38 mm2
G9EC-1(-B) 38 to 60 mm2
G9EB-1-B 2 to 5.5 mm2
DC Power Relay Common Precautions 23
In the interest of product improvement, specifications are subject to change without notice.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
Cat. No. J144-E1-04
OMRON RELAY & DEVICES Corporation
DC Power Business Promotion Department
1110, Sugi, Yamaga-city, Kumamoto-Pref., 861-0596 Japan
Tel: (81)968-44-4641/Fax: (81)968-44-4107
Printed in Japan
1106-0.2M (1003) (C)
