COMPACT AND LIGHTWEIGHT
DESCRIPTION
The EA2 series has reduced package size and power consumption to other NEC Conventional relays.
Furthermore, it complies with 1500 V surge-voltage requirement of FCC part 68 by the unique structure and the
efficient magnetic circuit
FEATURES
™Low power consumption
™Compact and light weight
™2 form c contact arrangement
™Low magnetic arrangement
™Breakdown voltage : 1000 Vac (surge voltage 1500 V), FCC Part 68 compliant
™Tube packaging
™UL recognized (E73266), CAS certified (LR46266)
APPLICATIONS
Electronic switching systems, PBX, key telephone systems, automatic test equipment and other electronic equip-
ment.
DATA SHEET
EA2 SERIES
MINIATURE SIGNAL RELAY
ATTENTION
DO NOT EXCEED MAXIMUM RATINGS.
Do not use relays under exceeding conditions such as over ambient temperature, over voltage and over
current. Incorrect use could result in abnormal heating, damage to related parts or cause burning.
READ CAUTIONS IN THE SELECTION GUIDE.
Read the cautions described in NEC's "Miniature Relays" (ER0046EJ∗) when you choose relays for
your application.
Document No. ER0001EJ6V1DS00 (6th edition)
Date Published December 2000 M
Printed in Japan
©
1989 (1996)
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2
EA2 SERIES
ER0001EJ6V1DS00
OUTLINE DRAWING AND DIMENSIONS PAD LAYOUT (bottom view)
Unit : mm (inch)
PIN CONFIGURATIONS
MARKINGS
14.2 max.
(0.56) 9.2 max.
(0.36)
0.5
(0.02) 0.25
(0.01)
5.4 max.
(0.21)
0.33 (0.013)
3.5
2.54
(0.10) 7.62
(0.30)
Note. tolerance 0.2 ( 0.008) unless otherwise specified
Dimensions in show basic size.
NJ type : Cover height-6.3 mm (0.248), Leads-2.8 mm (0.11)
+
–
+
–
10- 0.8(0.03)
10.16
(0.40)
2.54
(0.10)
7.62
(0.30)
2.54
(0.10)
φ
Note. Tolerance 0.1 ( 0.004) unless othewise specified
+
–
+
–
EA2-5NU
9106
JAPAN
JAPAN
1
2
3
46
5
EA2-5
9106
1
43
5
2
q Part number
w Manufacturer
e Country of origin
r Date code
t Index mark of relay direction
(pin No. 1, 10.)
y UL, CSA Marking
Standard type
UL recognized,
CSA certified type
+
–
+
+–
–
+
+–
–
12345
10 9 8 7 6
12345 123
S
R
45
10 9 8
R S
76 10 9 8 7 6
Index mark of
relay direction Non-latch type
(not energized position) Single coil latch type
(reset position) Double coil latch type
(reset position)
S : Coil polarity of set (operate)
R : Coil polarity of reset (release)
SAFETY STANDARD AND RATING
UL Recognized
(UL508)∗
File No E73266
CSA Certificated
(CSA C22.2 No 14)
File No LR46266
30 Vdc, 1 A (Resistive)
110 Vdc, 0.3 A (Resistive)
125 Vdc, 0.5 A (Resistive)
∗ Spacing : UL114, UL478
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3ER0001EJ6V1DS00
EA2 SERIES
PART NUMBER SYSTEM
EA2 – 3 S NU
Nil : Standard type
NU : UL recognized, CSA certified type
NJ : Trimmed leads type ∗
NP : Silver-palladium alloy contact (with gold alloy overlay) ∗
Latch type
Nil : Non-latch type (standard type)
S : Single coil latch type
T : Double coil latch type
Nominal coil voltage
3, 4.5, 5, 6, 9, 12, 24 Volts
EA2 series
∗ UL recognized, CAS certified type
2 form c
30 W (resistive) 62.5 VA (resistive)
220 Vdc 250 Vac
1 A
2 A
10 mVdc, 10
µ
A ∗1
50 mΩ typ. (Initial)
Silver alloy with gold alloy overlay
140 mW (3 to 12 V)
200 mW (24 V)
100 mW (3 to 12 V)
150 mW (24 V)
79 mW (3 to 12 V)
113 mW (24 V)
56 mW (3 to 12 V)
85 mW (24 V)
Approximately 2 ms without diode
Approximately 1 ms without diode
1000 MΩ at 500 Vdc
1000 Vac (for one minute)
1500 V surge (10 × 160
µ
s ∗2)
735 m / s2 (misoperating)
980 m / s2 (destructive failure)
10 to 55 Hz at double amplitude of 3 mm
(misoperating)
10 to 55 Hz, at double amplitude of 5 mm
(destructive failure)
–40°C to 85°C
18 degrees at nominal coil voltage
1 × 108 operations (Non-latch type) ∗3
1 × 107 operations (latch type)
50 Vdc 0.1 A (resistive), 1 × 10
6
operations at 85˚C, 2 Hz
10 Vdc 10 mA (resistive), 1 × 10
6
operations at 85˚C, 2 Hz
Approximately 1.5 grams
Contact Form
Maximum switching power
Maximum switching voltage
Maximum switching current
Maximum carrying current
Minimum contact ratings
Initial contact resistance
Contact material
Non-latch type and double coil latch type
Single coil Latch type
Non-latch type and double coil latch type
Single coil latch type
Operate time (excluding bounce)
Release time (excluding bounce)
Insulation resistance
Between open contacts
Breakdown voltage Between adjacent contacts
Between coil and contact
Shock resistance
Vibration resistance
Ambient temperature
Coil temperature rise
Noload
Load
Weight
PERFORMANCE CHARACTERISTICS
∗1This value is a reference value in the resistance load.
Minimum capacity changes depending on seitching frequency and environment temperature and the load.
∗2Rise time : 10
µ
s, fall time : 160
µ
s
∗3This shows a number of operation where it can be running by which a fatal defect is not caused, and a number of
operation by which a steady characteristic is maintained is 1 × 107 times.
Minimum operating Power
Nominal operating Power
Running specifications
Contact rating
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EA2 SERIES
ER0001EJ6V1DS00
Recommended relay drive conditions
Drive under conditions. If it is impossible, please inquire to NEC.
Nonlatch type
Single coil latch type
Double coil latch type
Voltage: within ±5% at nominal voltage
Square pulse (rise and fall time is rapidly)
Pulse height : within ±5% at nominal voltage
Pulse width : More than 10 ms
Ambient temperature
–40 to +85˚C
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ER0001EJ6V1DS00
EA2 SERIES
PRODUCT LINEUP
Non-latch Type
Nominal Coil
Voltage
(Vdc)
3
4.5
5
6
9
12
24
Coil
Resistance
(Ω) ±10 %
64.3
145
178
257
579
1028
2880
Must Operate
Voltage
(Vdc)
2.25
3.38
3.75
4.5
6.75
9
18
Must Release
Voltage
(Vdc)
0.3
0.45
0.5
0.6
0.9
1.2
2.4
Single-Coil Latch Type
at 20˚C
at 20˚C
at 20˚C
Nominal Coil
Voltage
(Vdc)
3
4.5
5
6
9
12
24
Coil
Resistance
(Ω) ±10 %
S 64.3
R 64.3
S 145
R 145
S 178
R 178
S 257
R 257
S 579
R 579
S 1028
R 1028
S 2880
R 2880
Must Operate
Voltage
(Vdc)
2.25
–
3.38
–
3.75
–
4.5
–
6.75
–
9
–
18
–
Must Release
Voltage
(Vdc)
–
2.25
–
3.38
–
3.75
–
4.5
–
6.75
–
9
–
18
Double-Coil Latch Type ∗∗ (Can not be driven by revese polarity for reverse operation.)
Note ∗Test by pulse voltage
∗∗ S : Set coil (pin No.1... , pin No.5... ) R: Reset coil (pin No.10... , pin No.6... )
The latch type relays should be initalized at appointed position before using, and should be enegized to specific
polanity by a bone polabity to avoid wrong operation.
Any special coil requirement, please contact NEC for availability.
Nominal Coil
Voltage
(Vdc)
3
4.5
5
6
9
12
24
Coil
Resistance
(Ω) ±10 %
90
202.5
250
360
810
1440
3840
Must Operate
Voltage
(Vdc)
2.25
3.38
3.75
4.5
6.75
9
18
Must Release
Voltage
(Vdc)
2.25
3.38
3.75
4.5
6.75
9
18
+–+–
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EA2 SERIES
ER0001EJ6V1DS00
PERFORMANCE DATA
■COIL TEMPERATURE RISE
Temperature is measured by coil resistance.
■SWITCHING CAPACITY
This is allowed maximum value.
Inquiry for NEC under maximum value at continuous use.
■APPLIED VOLTAGE VS. TIMING (Sample: EA2-5NU)
■MAXIMUM COIL VOLTAGE
This is maximum value of permissible alteration.
Inquiry for NEC at continuous use.
100
60
40
20
0200
Applied Power (mW)
300 4000 5
60
40
20
010
Applied Time (minute)
15 200
100
3
4
2
1
0200
Applied power (mW)
300 4000 100
3
4
2
1
0200
Applied power (mW)
(Without coil diode)
300 4000
0
50
100
150
200
Ambient temperature (degree C)
–40 –200 20406080100
Applied power 0.4 W
Applied power 0.2 W
Applied power 0.14 W
0.1
2.0
1.0
0.5
0.2
Contact voltage (V) 250 V.AC
220 V.DC
10 20 50 100 200
DC (Resistive)
AC (Resistive)
Coil temperature Rise (degree C)
Coil temperature Rise (degree C)
Release time (ms)
Operate time (ms)
A ratio of nominal coil voltage (%)
Contact current (A)
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EA2 SERIES
■OPERATE AND RELEASE VOLTAGE VS. AMBIENT TEMPERATURE
This shows a typical change of operate (release) voltage. Maximum value of operate estimated, so it must be applied
more than this value for safety operation. In case of “hot start operation”, please inquiry for NEC.
■RUNNING TEST (Nonload)
(Load: None, Driving: 5V.DC, 50 Hz, 50% duty, Ambient temperature: Room temperature, Sample: EA2-5NU 20 pieces)
■RUNNING TEST (Load)
(Load: 50 V.DC 0.1 A resistive, Driving: 5V.DC, 5 Hz, 50% duty, Ambient temperature: 85 degree C, Sample: EA2-5NU 10 pieces)
–40 –20 0
0
20
40
60
80
100
20 40 60 80 100
0 20 50 100 500 1000
10
10000
1000
100
Operations (×10
4
)
0 20 50 100 500 1000
0
5
4
3
2
1
Operations (×10
4
)
0 2 5 10 50 100
10
10000
1000
100
Operations (×10
4
)
0 2 5 10 50 100
0
5
4
3
2
1
Operations (×10
4
)
Ambient temperature (degree C)
A ratio of nominal coil voltage (%)
Operate voltage (maximum)
Operate voltage (typical)
Release voltage (typical)
Contact resistance (m-ohms)
Operate voltage (V)
Release voltage (V)
Contact resistance (m-ohms)
Operate voltage (V)
Release voltage (V)
Operate Voltage
Release Voltage
Operate Voltage
Release Voltage
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EA2 SERIES
ER0001EJ6V1DS00
■BREAKDOWN VOLTAGE
Sample: EA2-5NU 10 pieces
■ALTERNATION OF VOLTAGE AT DENSELY MOUNTING (Magnet interference)
0.5
50
100
01.0 1.5
Breakdown voltage (kV)
(a) Between open contacts
2.0 0.5
50
100
01.0 1.5
Breakdown voltage (kV)
(b) Between adjacent contacts
2.0
0.5
50
100
01.0 1.5
Breakdown voltage (kV)
(c) Between coil to contact
2.0
I II III IV V VI
+40
+30
+20
+10
0
–10
–20
–30
–40
Mounting layout
Device under test
Alternation of operate voltage
I II III IV V VI
+40
+30
+20
+10
0
–10
–20
–30
–40
Mounting layout
2.54 mm
2.54 mm2.54 mm
Alternation of release voltage
ON
ON ON
ON
ON
V
ON
ON
III
OFF
OFF
IV
OFF
OFF
OFF
VI
I
OFF OFF
II
Distribution (%)
Distribution (%)
Distribution (%)
A ratio of alternation (%)
A ratio of alternation (%)
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ER0001EJ6V1DS00
EA2 SERIES
PACKAGE
Rubber stopper (Red) Rubber stopper (Green)
Index Mark
586 1
13.7 0.3
12.0 0.3
(4.5)
(4.6)
(6.2)
(2.5)
(0.5 t)
+
–
+
–
+
–
( ) Reference
Dimensions of Relay Tube (Unit : mm) 40 pieces / Tube
Material : Polyvinyl chloride
(auti-static treated)
Outline of Package
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EA2 SERIES
ER0001EJ6V1DS00
Notes on Correct Use
1. Notes on contact load
Make sure that the contact load is within the specified range;
otherwise, the lifetime of the contacts will be shortened
considerably. Note that the running performance shown is an
example, and that it varies depending on parameters such as
the type of load, switching frequency, driver circuit, and
ambient temperature under the actual operating conditions.
Evaluate the performance by using the actual circuit before
using the relay.
2. Driving relays
- If the internal connection diagram of a relay shows + and -
symbols on the coil, apply the rated voltage to the relay in the
specified direction. If a rippled DC current source is used,
abnormalities such as beat at the coil may occur.
- The maximum voltage that can be applied to the coil of the
relay varies depending on the ambient temperature. Generally ,
the higher the voltage applied to the coil, the shorter the
operating time. Note, however, that a high voltage also
increases the bounce of the contacts and the contact opening
and closing frequency, which may shorten the lifetime of the
contacts.
- If the driving voltage waveform of the relay coil rises and
falls gradually, the inherent performance of the relay may not
be fully realized. Make sure that the voltage waveform
instantaneously rises and falls as a pulse.
- For a latching relay, apply a voltage to the coil according to
the polarity specified in the internal connection diagram of
the relay.
- If a current is applied to the coil over a long period of time,
the coil temperature rises, promoting generation of organic
gas inside the relay, which may result in faulty contacts. In
this case, use of a latching relay is recommended.
- The operating time and release time indicate the time required
for each contact to close after the voltage has been applied to
or removed from the coil. However, because the relay has a
mechanical structure, a bounce state exists at the end of the
operating and release times. Furthermore, because additional
time is required until the contact stabilizes after being in a
high-resistance state, care must be taken when using the relay
at high speeds.
- Pins 5 and 6 of the non-latching and single-coil latching types
of the EA2 relay are not used. However, do not connect an
external circuit to these pins.
3. Operating environment
- Make sure that the relay mounted in the application set is
used within the specified temperature range. Use of a relay at
a temperature outside this range may adversely affect
insulation or contact performance.
- If the relay is used for a long period of time in highly humid
(RH 85% or higher) environment, moisture may be absorbed
into the relay. This moisture may react with the NOx and SOx
generated by glow discharges that occur when the contacts
are opened or closed, producing nitric or sulfuric acid. If this
happens, the acid produced may corrode the metallic parts of
the relay, causing operational malfunction.
- Because the operating temperature range varies depending
on the humidity, use the relay in the temperature range
illustrated in the figure below. Prevent the relay from being
frozen and avoid the generation of condensation.
- The relay maintains constant sealability under normal
atmospheric pressure (810 to 1,200 hpa). Its sealability may
be degraded or the relay may be deformed and malfunction if
it is used under barometric conditions exceeding the specified
range.
- The same applies when the relay is stored or transported.
Keep the upper-limit value of the temperature to which the
relay is exposed after it is removed from the carton box to
within 50˚C.
- If excessive vibration or shock is applied to the relay, it may
malfunction and the contacts remain closed. Vibration or shock
applied to the relay during operation may cause considerable
damage to or wearing of the contacts. Note that operation of
a snap switch mounted close to the relay or shock due to the
operation of magnetic solenoid may also cause
malfunctioning.
4. Notes on mounting relays
- When mounting a relay onto a PC board using an automatic
chip mounter, if excessive force is applied to the cover of the
relay when the relay is chucked or inserted, the cover may be
damaged or the characteristics of the relay degraded. Keep
the force applied to the relay to within 1 kg.
- A void bending the pins to temporarily secure the r elay to the
PC board. Bending the pins may degrade sealability or
adversely affect the internal mechanism.
- It is recommended to solder the relay onto a PC board under
the following conditions:
<1> Reflow soldering
Refer to the recommended soldering temperature profile.
<2> Flow soldering
Solder temperature: 250˚C max., Time: 5 to 10 seconds,
Preheating: 100˚C max./1 minute max.
<3> Manual soldering
Solder temperature: 350˚C, Time: 2 to 3 seconds
- Ventilation immediately after soldering is recommended.
Avoid immersing the relay in cleaning solvent immediately
after soldering due to the danger of thermal shock being
applied to the relay.
- Use an alcohol-based or water -based cleaning solvent. Never
use thinner and benzene because they may damage the relay
housing.
- Do not use ultrasonic cleaning because the vibration energy
generated by the ultrasonic waves may cause the contacts to
remain closed.
5. Handling
- Relays are packaged in magazine cases for shipment. If a
space is created in the case after some relays have been
removed, be sure to insert a stopper to secure the remaining
relays in the case. If relays are not well secured, vibration
during transportation may cause malfunctioning of the
contacts.
- Exercise care in handling the relay so as to avoid dropping it
or allowing it to fall. Do not use a relay that has been dropped.
If a relay drops from a workbench to the floor, a shock of 9,800
m/s2 (1,000 G) or more is applied to the relay, possibly
damaging its functions. Even if a light shock has been applied
to the relay, thoroughly evaluate its operation before using it.
- Latching relays are factory-set to the reset state for shipment.
A latching relay may be set, however, by vibration or shock
applied while being transported. Be sure to forcibly reset the
relay before using it in the application set. Also note that the
relay may be set by unexpected vibration or shock when it is
used in a portable set.
- The sealability of a surface-mount relay may be lost if the
relay absorbs moisture and is then heated during soldering.
When storing relays, therefore, observe the following points:
<1> The storage humidity must be no more than 70% RH. The
recommended storage period is 3 months maximum.
<2> To store the relay for 3 months or longer, keep the storage
humidity to within 50% RH. Do not store the relay for more
than 6 months.
1 ms max.
Coil Rated voltage
0
1 ms max.
–60 –40 –20 0 20
Temperature (˚C)
Humidity (%RH)
20
5
40
60
80
85
40 60 80 100
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EA2 SERIES
No part of this document may be copied or reproduced in any form or by any means without the prior
written consent of NEC Corporation. NEC Corporation assumes no responsibility for any errors which
may appear in this document.
NEC Corporation does not assume any liability for infringement of patents, copyrights or other intellec-
tual property rights of third parties by or arising from use of a device described herein or any other
liability arising from use of such device. No license, either express, implied or otherwise, is granted
under any patents, copyrights or other intellectual property rights of NEC Corporation or others.
While NEC Corporation has been making continuous effort to enhance the reliability of its electronic
components, the possibility of defects cannot be eliminated entirely. To minimize risks of damage or
injury to persons or property arising from a defect in an NEC electronic component, customers must
incorporate sufficient safety measures in its design, such as redundancy, fire-containment, and anti-
failure features. NEC devices are classified into the following three quality grades:
"Standard", "Special", and "Specific". The Specific quality grade applies only to devices developed based
on a customer designated "quality assurance program" for a specific application. The recommended
applications of a device depend on its quality grade, as indicated below. Customers must check the
quality grade of each device before using it in a particular application.
Standard: Computers, office equipment, communications equipment, test and measurement equipment,
audio and visual equipment, home electronic appliances, machine tools, personal electronic
equipment and industrial robots
Special: Transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster
systems, anti-crime systems, safety equipment and medical equipment (not specifically de-
signed for life support)
Specific: Aircrafts, aerospace equipment, submersible repeaters, nuclear reactor control systems, life
support systems or medical equipment for life support, etc.
The quality grade of NEC devices is "Standard" unless otherwise specified in NEC's Data Sheets or Data Books.
If customers intend to use NEC devices for applications other than those specified for Standard quality grade,
they should contact an NEC sales representative in advance.
(Note)
(1) "NEC" as used in this statement means NEC Corporation and also includes its majority-owned subsidiaries.
(2) "NEC electronic component products" means any electronic component product developed or manufac-
tured by or for NEC (as defined above).
DE0202
3/01
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