CSM_MM_DS_E_5_5
1
Power Relay
MM
Stable Contact Reliability and Long Life
• Easy to mount, wire, and use.
• A large selection of models including various contact forms,
DC-switching models, and open models.
• Mechanical life: 5,000,000 operations; electrical life
(under rated load): 500,000 operations.
• Models also available with built-in diodes and for use as
auxiliary power relays.
Ordering Information
■Available Models
Open Coils (with Solder Terminals)
Type Contact form Open structure Cased
Solder terminals Screw terminals Plug-in (octal pins)
terminals
Standard DPDT MM2 MM2B MM2P
3PDT MM3 MM3B MM3P
4PDT MM4 MM4B MM4P
DC-switching DPDT MM2X MM2XB MM2XP
3PDT MM3X MM3XB MM3XP
4PDT MM4X MM4XB MM4XP
With built-in diode DPDT --- --- MM2P-D
4PDT --- --- MM4P-D
DC-switching with built-in diode DPDT --- --- MM2XP-D
4PDT --- --- MM4XP-D
With operation indicator DPDT --- --- MM2PN
3PDT --- --- MM3PN
4PDT --- --- MM4PN
DC-switching with operation indicator DPDT --- --- MM2XPN
3PDT --- --- MM3XPN
4PDT --- --- MM4XPN
Conforming to auxiliary power relay speci-
fications
4PDT --- --- MM4P-JD
--- --- MM4XP-JD
Refer to Safety Precautions for All Relays.
Whenyourorder,specifytheratedvoltage.
Type Contact form Relay model Available rated voltage
Standard DP MM2 6, 12, 24, 50, 100/(110), 200/(220) VAC
6, 12, 24, 48, 100/110, 200/220 VDC
3P MM3 100/(110), 200/(220) VAC
6, 12, 24, 48, 200/220 VDC
4P MM4 24, 100/(110), 200/(220) VAC
6, 12, 24, 48, 100/110, 200/220 VDC
DC-switching DP MM2X 100/(110), 200/(220) VAC
6, 12, 24, 48, 100/110, 200/220 VDC
3P MM3X 100/(110), 200/(220) VAC
12, 24, 100/110 VDC
4P MM4X 100/(110), 200/(220) VAC
12, 24, 48, 100/110 VDC
MM
2
Open Coils (with Screw Terminals)
Cased Coils (Plug-in Terminals)
Models Conforming to Auxiliary Power Relay Specifications
The MM4P-JD and MM4XP-JD satisfy the ratings of auxiliary relays provided in JEC-2500 (1987) standards for power protective relays specified
by the Japan Electromechanical Commission. Furthermore, the MM4P-JD and MM4XP-JD satisfy the ratings of multi-contact relays provided in
JEC-174D (1979) standards for power auxiliary relays.
These models work at operation level B specified by JEC-174D (1979) standards and the hot start of the relays is possible after the coils radiate
heat.
In accordance with JEC-2500 (1987) standards, the coil of each model withstands a 130% DC load or 115% AC load.
Type Contact form Relay model Available rated voltage
Standard DP MM2B 6, 12, 24, 50, 100/(110), 200/(220) VAC
12, 24, 48, 100/110, 125, 200/220 VDC
3P MM3B 6, 100/(110), 200/(220) VAC
12, 24, 100/110 VDC
4P MM4B 6, 100/(110), 200/(220) VAC
12, 24, 48, 100/110 VDC
DC-switching DP MM2XB 24, 100/(110), 200/(220) VAC
12, 24, 48, 100/110, 125, 200/220 VDC
3P MM3XB 100/(110), 200/(220) VAC
12, 24, 48, 100/110, 125, 200/220 VDC
4P MM4XB 12, 24, 100/(110), 200/(220) VAC
6, 12, 24, 48, 100/110, 200/220 VDC
Type Contact form Relay model Available rated voltage
Standard DP MM2P 6, 12, 24, 50, 100/(110), 200/(220) VAC
6, 12, 24, 48, 100/110, 125, 200/220 VDC
3P MM3P 6, 24, 100/(110), 200/(220) VAC
6, 12, 24, 48, 100/110, 125, 200/220 VDC
4P MM4P 6, 24, 50, 100/(110), 200/(220) VAC
12, 24, 48, 100/110, 125, 200/220 VDC
DC-switching DP MM2XP 6, 24, 100/(110), 125, 200/(220) VAC
6, 12, 24, 48, 100/110, 125, 200/220 VDC
3P MM3XP 24, 50, 100/(110), 200/(220) VAC
12, 24, 48, 100/110, 125, 200/220 VDC
4P MM4XP 12, 24, 50, 100/(110), 200/(220) VAC
6, 12, 24, 48, 100/110, 125, 200/220 VDC
With built-in diode DP MM2P-D
MM4P-D
12, 24, 48, 100/110, 200/220 VDC
12, 24, 48, 100/110, 125, 200/220 VDC
DC-switching with built-in diode DP MM2XP-D
MM4XP-D
12, 24, 48, 100/110, 125, 200/220 VDC
12, 24, 48, 100/110, 125, 200/220 VDC
With operation indicator DP MM2PN 6, 24, 100/(110), 200/(220) VAC
6, 12, 24, 48, 100/110, 125, 200/220 VDC
3P MM3PN 100/(110), 200/(220) VAC
6, 12, 24, 48, 100/110, 200/220 VDC
4P MM4PN 24, 100/(110), 200/(220) VAC
24, 48, 100/110, 125, 200/220 VDC
DC-switching with operation indicator DP MM2XPN 100/(110), 200/(220) VAC
12, 24, 48, 100/110, 125, 200/220 VDC
3P MM3XPN 100/(110), 200/(220) VAC
24, 48, 100/110, 200/220 VDC
4P MM4XPN 100/(110), 200/(220) VAC
12, 24, 48, 100/110, 125, 200/220 VDC
Conforming to auxiliary power relay
specifications
4P MM4P-JD 100/(110), 110, 115, 200/(220), 220 VAC
24, 100/110, 125, 200/220 VDC
Conforming to auxiliary power relay
specifications for DC-switching
4P MM4XP-JD 100/(110), 110, 115, 200/(220) VAC
24, 48, 100/110, 125, 200/220 VDC
Note: 1. When ordering, add the rated coil voltage to the model number. Rated coil voltages are given in the coil ratings table.
Example: MM2, 6 VAC
2. Latching Relays based on the MM Series are also available. Refer to the MMK.
3. Models with built-in varistors (AC operation) are also available in addition to those with built-in diodes. Ask your OMRON repre-
sentative for details.
4. Models with built-in diodes are also available for the MM□XPN Series.
Ask your OMRON representative for rated voltages and other information.
Rated coil voltage
3
MM
Model Number Legend
1. Contact Form
2: DPDT
3: 3PDT
4: 4PDT
2. Type (See Note.)
None: Standard
X: DC-switching
3. Terminal Shape
None: Solder
B: Screw
P: Plug-in
4. Operation Indicator
None: Not provided
N: Provided
5. Built-in Diode
None: Not provided
D: Provided
Note: The suffix “JD” indicates models conforming to auxiliary power
relay specifications.
■Accessories (Order Separately)
Mounting Brackets
Sockets
MM@@@@-@
1 2 3 4 5
Mounting Bracket (S bracket) R99-03MM
Relay model DIN Track/Front-connecting Socket
(screw terminals)
Back-connecting Socket
(solder terminals)
MM2(X)P(N)(-D) 8PFA PL08
MM3P(N)
MM3XP(N), MM4(X)P(N)(-D) 14PFA PL15
MM4(X)P-JD 14PFA ---
11PFA
PL11
MM
4
Specifications
■Coil Ratings
Open Coils (with Solder or Screw Terminals)
Note: 1. The rated current and coil resistance are measured at a coil temperature of 23°C with tolerances of +15%/–20% for AC rated current and
±15% for DC coil resistance.
2. The AC coil resistance values are reference values.
3. Performance characteristic data are measured at a coil temperature of 23°C.
4. The maximum voltage is one that is applicable instantaneously to the Relay coil at an ambient temperature of 23°C and not continuously.
Cased Coils (Plug-in Terminals)
The rated current may vary if the Relay has a built-in operating indicator (See note 4.).
Note: 1. The rated current and coil resistance are measured at a coil temperature of 23°C with tolerances of +15%/–20% for AC rated current and
±15% for DC coil resistance.
2. The AC coil resistance and coil inductance values are for reference only.
3. Performance characteristic data are measured at a coil temperature of 23°C.
4. The maximum voltage is one that is applicable instantaneously to the Relay coil at an ambient temperature of 23°C and not continuously.
5. The rated current of a model with a built-in LED indicator at 6, 12, 24, or 50 VAC or 6, 12, 24, or 48 VDC increases by approx. 10 mA due
to the current consumption of the LED. The rated current of a model with a built-in neon lamp indicator at 100/(110) or 200/(220) VAC or
100/110 or 200/220 VDC increases by approx. 0.2 mA due to the current consumption of the neon lamp.
Rated voltage
(V)
Rated current (mA) Coil resistance (Ω)Must-
operate
voltage
Must-
release
voltage
Max.
voltage
Power consumption
(VA or W)
DP 3P or 4P DP 3P or 4P
50 Hz 60 Hz 50 Hz 60 Hz % of rated voltage Initial Rated
AC 6 790 655 1,120 950 1.1 0.5 80% max. 30% min.
(60 Hz)
25% min.
(50 Hz)
110% Approx.
4.1 (DP)
Approx.
6.3 (3P or
4P)
Approx.
3.5 (DP)
Approx.
5.1 (3P or
4P)
12 395 325 560 480 4.7 2.0
24 195 160 280 240 19 8.5
50 94 78 134 114 82 36
100/(110) 47 39/45 67 57/66 340 150
200/(220) 23.5 19.5/ 22.5 33.5 28.5/33 1,540 620
DC 6 340 450 17.5 13.4 70% max. 10% min. Approx. 2.1 (DP)
Approx. 2.7 (3P or
4P)
12 176 220 68 54
24 87 94 275 255
48 41 52 1,180 930
100/110 17/19 22/24.5 5,750 4,500
200/220 8.6/9.5 11/12 23,200 18,000
Rated voltage
(V)
Rated current (mA) Coil resistance
(Ω)
Coil inductance (H) Must-
operate
voltage
Must-
release
voltage
Max.
voltage
Power
consumption
(VA or W)
DP 3P or 4P DP 3P or
4P
DP 3P or 4P
50 Hz 60 Hz 50 Hz 60 Hz Contact
release
Contact
operate
Contact
release
Contact
operate % of rated voltage Initial Rated
AC 6 690 590 975 850 1.1 0.5 0.02 0.02 0.01 0.03 80%
max.
30%
min.
(60 Hz)
25%
min.
(50 Hz)
110% Ap-
prox.
4.1
(DP)
Ap-
prox.
6.3 (3P
or 4P)
Ap-
prox.
3.5
(DP)
Ap-
prox.
5.1 (3P
or 4P)
12 345 295 490 430 4.7 2.0 0.07 0.01 0.04 0.07
24 170 145 245 210 19 8.5 0.28 0.41 0.18 0.28
50 82 70 117 102 82 36 1.2 1.7 0.75 1.2
100/(110) 41 35/40 58.5 51/58 340 150 4.8 6.7 3 4.5
200/(220) 20.5 17.5/
20
29 25.5/
29
1,540 620 20 25.6 12 19
DC 6 340 450 17.5 13.4 0.2 0.36 0.23 0.35 70%
max.
10%
min.
Approx. 2.1 (DP)
Approx. 2.7 (3P
or 4P)
12 176 220 68 54 0.74 1.0 0.87 1.4
24 87 94 275 255 4.2 5.8 5.6 9.2
48 41 52 1,180 930 20.4 26 27.3 45.5
100/110 17/19 22/24.5 5,750 4,500 81.6 92.5 61.4 96.5
200/220 8.6/9.5 11/12 23,200 18,000 340 380 158 250
5
MM
Coils (Conforming to Auxiliary Power Relay Specifications)
Note: 1. The rated current and coil resistance are measured at a coil temperature of 23°C with tolerances of +15%/–20% for AC rated current and ±15% for DC coil
resistance.
2. The AC coil resistance and coil inductance values are for reference only.
3. Performance characteristic data are measured at a coil temperature of 23°C.
4. The maximum voltage is one that is applicable instantaneously to the Relay coil at 23°C and not continuously.
■Contact Ratings
Standard Relays
Note: This value is measured at 60 operations/min.
DC-switching Relays/Built-in Diode Relays
Note: 1. When switching DC inductive loads at 125 V or more, an unstable region exists for a contact current of between 0.5 and 2.5 A. The Relay will not turn OFF
in this region. Use a contact current of 0.5 A or less when switching 125 VDC or more.
2. If L/R exceeds 7 ms when switching DC inductive loads, an arc-breaking time of up to 50 ms must be considered in application and the circuit must be designed
to ensure that an arc-breaking time of 50 ms is not exceeded.
3. The switching capacity for an AC load is minute.
*1. Refer to Switching an AC Load with a DC-switching Model (“X” Model) on page 16.
*2. This value is measured at 60 operations/min.
Rated voltage
(V)
Rated current (mA) Coil
resis-
tance (Ω)
Coil inductance (H) Must-
operate
voltage
Must-
release
voltage
Max.
voltage
Opera-
tion level
(JEC-
174D)
Power consumption
(VA or W)
50 Hz 60 Hz Contact
release
Contact
operate
% of rated voltage Initial Rated
AC 24 245 210 8.5 0.18 0.28 80% max. 30% min.
(60 Hz)
25% min.
(50 Hz)
110% B
Hot start
after coil
heated
Approx.
6.3
Approx.
5.1
50 117 102 36 0.75 1.2
100/(110) 58.5 51/58 150 3 4.5
110 53 46 182 3.6 5.5
115 51 44 210 4 6.2
200/(220) 29 25.5/29 620 12 19
220 26.5 23 780 15 21
DC 24 94 255 5.6 9.2 70% max. 10% min. Approx. 2.7
48 52 930 27.3 45.5
100/110 22/24.5 4,500 61.4 96.5
125 22 5,800 90 130
200/220 11/12 18,000 158 250
Item Open Relays Cased Relays
MM2(B), MM3(B), MM4(B) MM2P(N, -D), MM3P(N), MM4P(N, -D)
Resistive load
(cosφ = 1)
Inductive load
(cosφ=0.4, L/R=7 ms)
Resistive load
(cosφ = 1)
Inductive load
(cosφ=0.4, L/R=7 ms)
Contact type Single
Contact material Ag
Rated load 15 A at 220 VAC
10 A at 24 VDC
7.5 A at 220 VAC
5 A at 24 VDC
Rated carry current 15 A 7.5 A
Max. switching voltage 250 VAC, 250 VDC 250 VAC, 250 VDC
Max. switching current 15 A 7.5 A
Max. switching power
(reference value)
3,300 VA at 240 W 1,700 VA at 120 W
Minimum permissible load
(reference value) (See note.)
5 VDC 10 mA
Item Open Relays Cased Relays
MM2X(B), MM3X(B), MM4X(B) MM2XP(-D), MM3XP, MM4XP(-D)
Resistive load
(cosφ = 1)
Inductive load
(L/R=7 ms)
Resistive load
(cosφ = 1)
Inductive load
(L/R=7 ms)
Contact type Single
Contact material Ag
Rated load 10 A at 110 VDC 7 A at 110 VDC 7 A at 110 VDC 6 A at 110 VDC
Rated carry current 15 A 7.5 A
Max. switching voltage 250 VAC, 250 VDC 250 VAC, 250 VDC
Max. switching current 15 A 7.5 A
Max. switching power
(reference value)
1,200 W at 20 VA *1 800 W at 20 VA *1 800 W at 20 VA *1 660 W at 20 VA *1
Minimum permissible load
(reference value) *2 5 VDC at 10 mA
MM
6
Contacts (Conforming to Auxiliary Power Relay Specifications)
Note: 1. A model for DC loads is not in stable operation when switching an inductive load within a operating current range between 0.5 and 2.5 A
at a minimum of 125 VDC, where the load cannot be switched.
2. If L/R exceeds 7 ms when switching DC inductive loads, an arc-breaking time of up to 50 ms must be considered in application and the
circuit must be designed to ensure that an arc-breaking time of 50 ms is not exceeded.
■Characteristics
Standard Relays
Note: 1. The data shown above are initial values.
2. The contact resistance was measured with 1 A at 5 VDC using the voltage drop method.
3. The operate or release time was measured with the rated voltage imposed with any contact bounce ignored at an ambient temperature
of 23°C.
4. The insulation resistance was measured with a 500-VDC megger applied to the same places as those used for checking the dielectric
strength.
5. The electrical endurance was measured at an ambient temperature of 23°C.
Item MM4P-JD MM4XP-JD
Resistive load Inductive load
(cosφ = 0.4, L/R = 7 ms)
Resistive load Inductive load
(cosφ = 0.4, L/R = 7 ms)
Contact type Single
Contact material Ag
Rated load 5 A at 220 VAC, 5 A at 24 VDC 5 A at 110 VDC
Rated carry current 5 A
Max. switching voltage 250 VAC, 250 VDC
Max. switching current 5 A
Max. switching power
(reference value)
1,100 VA, 120 W, 30 W (L/R = 40 ms) 20 VA, 550 W, 40 W (L/R = 40 ms)
Item Open Relays Cased Relays
Contact resistance (See note 2.) 25 mΩ max. 50 mΩ max.
Operate time (See note 3.) AC: 25 ms max. DC: 50 ms max.
Release time (See note 3.) 30 ms max. (100 ms max. for Built-in Diode Relays)
Max. operating frequency Mechanical:7,200 operations/hr
Electrical:1,800 operations/hr (under rated load)
Insulation resistance (See note 4.) 100 MΩ min. (at 500 VDC)
Dielectric strength 1,500 VAC, 50/60 Hz for 1 min between contacts of same polarity
2,000 VAC, 50/60 Hz for 1 min between contacts of different polarity (and between coil and contacts)
Vibration resistance Destruction: 10 to 55 to 10 Hz, 0.75 mm single amplitude (1.5 mm double amplitude)
Malfunction: 10 to 55 to 10 Hz, 0.5 mm single amplitude (1.0 mm double amplitude)
Shock resistance Destruction: 1,000 m/s2
Malfunction: 100 m/s2
Endurance Mechanical: 5,000,000 operations min. (at 7,200 operations/hr)
Electrical: 500,000 operations min. (at 1,800 operations/hr under rated load) (See note 5.)
Ambient temperature Operating:–10°C to 55°C (with no icing or condensation)
Ambient humidity Operating:5% to 85%
Weight Standard models: DC-switching models
MM2 approx. 160 g MM2X approx. 165 g MM2XP approx. 225 g
MM3 approx. 270 g MM3X approx. 275 g MM3XP approx. 395 g
MM4 approx. 300 g MM4X approx. 310 g MM4XP approx. 420 g
MM2P approx. 220 g
MM3P approx. 360 g
MM4P approx. 410 g
7
MM
Relays (Conforming to Auxiliary Power Relay Specifications)
Note: 1. The data shown above are initial values.
2. The contact resistance was measured with 1 A at 5 VDC using the voltage drop method.
3. The operate or release time was measured with the rated voltage imposed with any contact bounce ignored at an ambient temperature
of 23°C.
4. The insulation resistance was measured with a 500-VDC megger applied to the same places as those used for checking the dielectric
strength.
5. The electrical endurance was measured at an ambient temperature of 23°C.
6. This value was measured at a switching frequency of 60 operations per minute.
Engineering Data
■Standard Relays
Item Cased Relays
Contact resistance (See note 2.) 50 mΩ max.
Operate time (See note 3.) AC: 25 ms max., DC: 50 ms max.
Release time (See note 3.) 30 ms max.
Max. operating frequency Mechanical: 1,800 operations/hr
Electrical: 1,800 operations/hr (under rated load)
Insulation resistance (See note 4.) 100 MΩ min.
Dielectric strength Between coil and contact: 2,000 VAC, 50/60 Hz for 1 minute
Between contacts of different polarity: 2,000 VAC, 50/60 Hz for 1 minute
Between contacts of same polarity: 1,500 VAC, 50/60 Hz for 1 minute
Vibration resistance Destruction: 10 to 55 to 10 Hz, 0.75 mm single amplitude (1.5 mm double amplitude)
Malfunction: 10 to 22 to 10 Hz, 0.5 mm single amplitude (1.0 mm double amplitude)
Shock resistance Destruction: 300 m/s2
Malfunction: 30 m/s2
Endurance Mechanical: 5,000,000 operations min. (at 1,800 operations/hr)
Electrical: 500,000 operations min. (at 1,800 operations/hr with rated load) (see note 5)
Error rate (level P)
(Reference value)
(See note 6.)
10 mA at 5 VDC
Ambient temperature Operating: –10°C to 40°C (with no icing or condensation)
Ambient humidity Operating: 5% to 85%
Weight MM4P-JD: approx. 410 g
MM4XP-JD: approx. 420 g
Maximum Switching Power
Open Relays
Switching voltage (V)
Cased Relays
Switching current (A)
Switching voltage (V)
AC resistive load
DC inductive
load L/R = 7 ms
DC resistive load
AC resistive load
DC resistive load
DC inductive
load L/R = 7 ms
MM@(B) MM@P(N, -D)
Switching current (A)
AC inductive
load
(cosφ = 0.4) AC inductive
load
(cosφ = 0.4)
MM
8
■DC-switching Relays
Endurance Curves
Open Relays Cased Relays
Switching current (A)
Switching current (A)
220 VAC
resistive load
inductive load
(cosφ = 0.4)
24 VDC
resistive load
inductive load
L/R = 7 ms
220 VAC
resistive load
inductive load
(cosφ = 0.4)
24 VDC
resistive load
inductive load
L/R = 7 ms
100
300
500
700
1,000
3,000
5,000
7,000
10,000
100
300
500
700
1,000
3,000
5,000
7,000
10,000
Endurance (x10 operations)
3
Endurance (x10 operations)
3
MM@(B) MM@P(N, -D)
Endurance Curves
Open Relays Cased Relays
Switching current (A)Switching current (A)
24 VDC resistive load
110 VDC resistive load
110 VDC inductive load
L/R = 7 ms
24 VDC resistive load
110 VDC resistive load
110 VDC inductive load
L/R = 7 ms
10
30
50
100
300
500
1,000
3,000
5,000
10,000
10
30
50
100
300
500
1,000
3,000
5,000
10,000
Endurance (x10 operations)
3
Endurance (x10 operations)
3
9
MM
■Relays Conforming to Auxiliary Power Relay Specifications
Maximum Switching Power
MM4P-JD MM4XP-JD
Endurance Curves
MM4P-JD MM4XP-JD
Switching current (A)
AC resistive load
AC inductive load
cosφ = 0.4
DC resistive load
DC inductive load
L/R = 7 ms
Switching voltage (V)
DC resistive load
DC inductive load
L/R = 7 ms
Switching voltage (V)
Endurance (x 10 )
4
24 VDC resistive load
Inductive load
L/R = 7 ms
Switching current (A)
Endurance (x 10 )
4
110 VDC: resistive load
inductive load
L/R = 7 ms
Switching current (A)
Switching current (A)
220 VAC: resistive load
inductive load
cosφ = 0.4
MM
10
Ambient Temperature vs. Must-operate
and Must-release Voltage
MM2P AC (60 Hz) MM2P DC
Ambient Temperature vs.
Coil Temperature Rise
MM2P 110 VAC (60 Hz) MM2P DC
Malfunctioning Shock
MM2P AC
Contact Reliability
(Improved Allen-Bradley Test Circuit)
MM4P 24 VDC
Must-operate and reset voltage (%)
Number of Relays: 5
Ambient temperature (°C)
Must-operate and reset voltage (%)
Number of Relays: 5 Must-operate voltage
Must-release voltage
Ambient temperature (°C)
Number of Relays: 5
Coil temperature rise ( C)
°
Contact carry current
Ambient temperature (°C)
Coil temperature rise ( C)
Number of Relays: 5
Ambient temperature (°C)
Contact carry current
NO contact
NC contact Unit: m/s
2
Number of samples: 5
Measurement conditions:
Impose a shock of 100 m/s
2
in
the ±X, ±Y, and ±Z directions
three times each with the
Relay energized and not
energized to check the shock
values that cause the Relay
to malfunction.
Shock direction
Contact load: 10 mA at 5 VDC
(resistive load)
Error rate l = 0.0202 x
10
−6
/operations (level Q)
Number of switching
operations (x 10
4
times)
Contact load: 1 mA at
5 VDC (resistive load)
Error rate l = 0.2794
x 10
−6
/operations
(level N)
Number of switching
operations (x 10
4
times)
Accumulated number of errors
Accumulated number of errors
°
Must-operate voltage
Must-release voltage
11
MM
Dimensions
Note: All units are in millimeters unless otherwise indicated.
■Standard Relays
Open Relays
Relay Mounting Adjacent Distance vs.
Coil Temperature Rise
MM4P 100 /(110) VAC
Coil temperature rise ( C)
°
Condition: The saturated
coil temperature is
measured with the rated
carry current (7.5 A) at
the rated coil voltage
(100 VAC at 50 Hz).
Relay
mounting
position Upper
Lower
Average of No. 2, 4, 6, and 8
Average of No. 1, 3, 7, and 9
Contact carry current (7.5 A)
No contact carry current
Mounting adjacent distance l (mm)
Average of No. 2, 4, 6, and 8
Average of No. 1, 3, 7, and 9
Four, M4
mounting
screw
holes
Solder Terminals
MM2(X), MM4(X), MM3(X) MM2(X)
22
40 max.
53.5
max.
MM3(X)
61.5
max.
28
50 max.
Four, M4
mounting
screw
holes
MM4(X)
61.5
max.
34
63 max.
Four, M4
mounting
screw
holes
Side View
13
22
51 max.
Common C
Stationary A
Stationary B
MM2
Note: Connect the common (C) of MM@X to positive (+).
3P 2P2P 1P 1P 3P 2P 1P4P
Four, M4
mounting
screw
holes
Four, M4
mounting
screw
holes
Screw Terminals
MM2(X)B, MM3(X)B,
MM4(X)B
59.5 max.
MM2(X)B
22
55 max.
Eight, M3.5 x 5.5
screws
MM3(X)B
67.5 max.
28
60 max.
Eleven, M3.5 x
5.5 screws
67.5 max.
34
67 max.
Side View
18.5
22
56 max.
MM2B
MM4(X)B
Fourteen, M3.5
x 5.5 screwsCommon C
Stationary A
Stationary B
Note: Connect the common (C) of MM@XB to positive (+).
3P 2P
2P 1P
1P 3P 2P 1P4P
Four, M4
mounting
screw
holes
MM
12
Mounting Holes
(Bottom View)
Direct mounting
Four, 4.5-dia. mounting holes
22±0.2
Length of l
DPDT: 22±0.2
3PDT: 28±0.2
4PDT: 34±0.2
22±0.2
Mounting Bracket (S Bracket)
R99-03 (S KANAGU) FOR MM@
The S Bracket can be
used to mount a Relay
with open solder or screw
terminals.
W
22
±0.2 58
±0.2 44
H
D
W
H
R99-03 (S KANAGU)
FOR MM2 (611)
(DPDT)
22
71 max.
36 max.
6 max.
R99-03 (S KANAGU)
FOR MM3. 4 (61)
3PDT, 4PDT
28, 34
71 max.
46 max.
6 max.
l
l
13
MM
Cased Relays
Terminal Arrangement (Bottom View)
l
Note: Wire the terminals correctly with no mistakes in coil polarity.
Terminal Arrangement (Bottom View)
Note: Wire the terminals correctly with no mistakes in coil polarity.
MM2P MM2P-D MM2PN MM2PN MM2PN
MM2XP MM2XP-D MM2XPN MM2XPN MM2XPN
MM3P MM3PN MM3PN MM3PN
Plug-in Terminals
80.5
max. 59.5
max.
3.5
24
7
73 max.
Case-protection
plate
47.5 max.
MM2P(N, -D)
MM2XP(N, -D)
MM2P
Note: As shown in the diagram, there are three 10-dia. holes in the side of the case for the MM2XP(N, -D).
When a case-protection plate is attached, the width of the Relay will be 48 mm max.
Make sure that all common connections have the same polarity for the MM2XP-N/-D. The
markings of the common connections on the casing all show "+" but the polarity of the
common connections can be either negative or positive as long as they are all the same.
6, 12, 24, 50 VAC
6, 12, 24, 48 VDC
100/(110), 200/(220) VAC
100/110, 200/220 VDC
6, 12, 24, 50 VAC
6, 12, 24, 48 VDC
100/(110), 200/(220) VAC
100/110, 200/220 VDC
MM3P
80.5
max. 59.5
max.
3.5
24
61.5 max.
7
81 max.
MM3P(N)
6, 12, 24, 50 VAC
6, 12, 24, 48 VDC
100/(110), 200/(220) VAC
100/110, 200/220 VDC
MM
14
Terminal Arrangement (Bottom View)
Note: Wire the terminals correctly with no mistakes in coil polarity.
MM3XP MM3XPN MM3XPN MM3XPN
MM4P MM4P-D MM4PN MM4PN MM4PN
MM4XP MM4XP-D MM4XPN MM4XPN MM4XPN
MM4P
80.5
max. 59.5
max.
3.5
24
79.5 max.
(See note 2.)
81.5 max.
7
Case-protection
plate
MM3PXP(N)
MM4P(N, -D)
MM4XP(N, -D)
Note 1: As shown in the diagram, there are three 10-dia. holes in the side of the case for MM@XP(N, -D).
2: When a case-protection plate is attached, the width of the Relay will be 80 mm max.
Make sure that all common connections have the same polarity for the MM@XP-N/-D. The
markings of the common connections on the casing all show "+" but the polarity of the
common connections can be either negative or positive as long as they are all the same.
6, 12, 24, 50 VAC
6, 12, 24, 48 VDC
100/(110), 200/(220) VAC
100/110, 200/220 VDC
6, 12, 24, 50 VAC
6, 12, 24, 48 VDC
100/(110), 200/(220) VAC
100/110, 200/220 VDC
6, 12, 24, 50 VAC 6, 12, 24, 48 VDC
100/(110), 200/(220) VAC
100/110, 200/220 VDC
15
MM
■Relays with Operation Indicators
Dimensions are the same as those for standard Relays except that there are three 10-mm holes in the case as shown below.
Accessories
■Sockets
Note: When using the MM4(X)P-JD (i.e., a model conforming to auxiliary power relay specifications) by itself, the PL15 Back-connecting Socket
cannot be used.
Height with Socket
Relay model DIN Track/Front-connecting Socket
(screw terminals)
Back-connecting Socket
(solder terminals)
MM2(X)P(N)(-D) 8PFA PL08
MM3P(N)
MM3XP(N), MM4(X)P(N)(-D) 14PFA PL15
MM4(X)P-JD 14PFA ---
MM4P-JD
70.5 max.
59.5 max.
79.5 max.
81.5 max.
Terminal Arrangement
(Bottom View)
MM4XP-JD
70.5 max.
59.5 max.
81.5 max. Note: Make sure that all common connections
are the same in polarity. The markings of
the common connections on the casing
all show "+" but the polarity of the com-
mon connections can be either all nega-
tive or all positive.
80 max.
11PFA PL11
DIN Track/Front-connecting Socket
MM2(X)P
8PFA
95.5
PL08
MM2(X)P
92
11PFA
MM3P
113 109.5
14PFA
MM3XP
MM4(X)
MM4(X)P-JD
113.5 110
Back-connecting Socket
78
PL11
MM3P
86
PL15
MM3XP
MM4(X)P
86.5
MM
16
Safety Precautions
Refer to Safety Precautions for All Relays.
■Connection
•Use proper crimp terminals or 1.2- to 2-mm-dia. single-conductor
wire to connect screw terminals.
•Connect loads to DC-switching Relays so that arcs from adjacent
terminals will not strike each other. E.g., connect all common termi-
nals to the same polarity.
•Screw Terminal Model:
Do not bend the coil terminals, otherwise the coil wire may be dis-
connected. Make sure that the tightening torque applied to each
terminal is 0.78 to 1.18 N·m and the insertion force is 49 N for 10 s.
•Do not reverse polarity when connecting open DC-switching
Relays, including 3- and 4-pole models.
■Installation
•Do not install the Relays where iron dust can adhere to the contacts
or coil. Such dust can prevent the armature from moving freely and
inhibit proper electrical contact.
•Relays can generate arcs externally. Either install the Relay in a
location where a nearby object will not burn or use a covered Relay.
•DC-switching Relays contain a permanent magnet in the insulation
base. Do not place a magnet or magnetic object near this base.
Doing so will reduce the power of the permanent magnet, thus
reducing Relay capacity.
•Insert PL Back-mounting Sockets from the back of the panel.
•To minimize the influence of heat, separate Relays from each other
by at least 20 mm for cooling when mounting multiple Relays
together.
•Relays should be mounted with the armature facing down.
■Wiring
When connecting a load to the contact terminals of a model for DC
loads, consider the polarity of the contact terminals so that the gen-
erated arcs on the adjacent poles will not collide. If the common con-
nections of the Relay are all positive or all negative, no arc collision
will occur.
■MMXP
The MMXP has a hole in the Relay case to allow gas to escape. Do
not use this Relay in locations subject to excessive dust.
■Contact Loads
The contact load should be greater than the power consumption of
the coil. If it is less than this power consumption or if the Relay is
operated very infrequently, the contact can change chemically thus
causing unstable operation.
■Soldering
When soldering solder terminals, do not let flux or other foreign mat-
ter adhere to contacts or do not let the coil terminals become bent.
Also, solder as quickly as possible because excessive heat may
damage the coil.
■Diode Built into Relays
A diode is built into the Relays to absorb reverse electromotive force
from the relay coil. The diode will be destroyed if a large external surge
voltage is applied. If there is a possibility of a large external surge
voltage being applied, take suitable measures to absorb the surge.
■Storage
A model for DC loads incorporates a permanent magnetic for arc
suppression. Keep floppy disks away from the Relay, otherwise the
data on the floppy disk may be damaged.
■Operating Environment
Do not use the Relay in places with flammable gas, otherwise an
explosion may result due to an arc generated from the Relay
■Switching an AC Load with a
DC-switching Model (“X” Model)
DC-switching Relays (“X” models) use a magnet to extinguish arcs.
The polarity must be correct when you connect the switching section.
However, if you connect an AC load, the positive and negative poles
of the power supply alternate. This can cause short-circuits due to
the collision of arcs that occur when the Relay turns OFF.
Therefore, the switching capacity for an AC load is specified as 20 VA
or less to prevent short circuits caused by arc collisions.
Take sufficient caution if you switch an AC Load with a DC-switching
model (“X” models).
■Refer to the technical guide on
your OMRON website for
technical descriptions and
FAQs on the product.
20 mm
min.
MM MM
Mounting orientation
To p
Bottom
＋−
CommonC
Arccollision
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.
Terms and Conditions Agreement
Read and understand this catalog.
Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you
have any questions or comments.
Warranties.
(a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship
for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron
disclaims all other warranties, express or implied.
(b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT
NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS. BUYER
ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE
PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE.
Omron further disclaims all warranties and responsibility of any type for claims or expenses based on infringement by the
Products or otherwise of any intellectual property right. (c) Buyer Remedy. Omron’s sole obligation hereunder shall be, at
Omron’s election, to (i) replace (in the form originally shipped with Buyer responsible for labor charges for removal or
replacement thereof) the non-complying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount
equal to the purchase price of the non-complying Product; provided that in no event shall Omron be responsible for warranty,
repair, indemnity or any other claims or expenses regarding the Products unless Omron’s analysis confirms that the Products
were properly handled, stored, installed and maintained and not subject to contamination, abuse, misuse or inappropriate
modification. Return of any Products by Buyer must be approved in writing by Omron before shipment. Omron Companies shall
not be liable for the suitability or unsuitability or the results from the use of Products in combination with any electrical or
electronic components, circuits, system assemblies or any other materials or substances or environments. Any advice,
recommendations or information given orally or in writing, are not to be construed as an amendment or addition to the above
warranty.
See http://www.omron.com/global/ or contact your Omron representative for published information.
Limitation on Liability; Etc.
OMRON COMPANIES SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE OR STRICT LIABILITY.
Further, in no event shall liability of Omron Companies exceed the individual price of the Product on which liability is asserted.
Suitability of Use.
Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the
combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable
third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself
is not sufficient for a complete determination of the suitability of the Product in combination with the end product, machine,
system, or other application or use. Buyer shall be solely responsible for determining appropriateness of the particular Product
with respect to Buyer’s application, product or system. Buyer shall take application responsibility in all cases.
NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE
QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS,
AND THAT THE OMRON PRODUCT(S) IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE
OVERALL EQUIPMENT OR SYSTEM.
Programmable Products.
Omron Companies shall not be responsible for the user’s programming of a programmable Product, or any consequence
thereof.
Performance Data.
Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining
suitability and does not constitute a warranty. It may represent the result of Omron’s test conditions, and the user must correlate
it to actual application requirements. Actual performance is subject to the Omron’s Warranty and Limitations of Liability.
Change in Specifications.
Product specifications and accessories may be changed at any time based on improvements and other reasons. It is our
practice to change part numbers when published ratings or features are changed, or when significant construction changes are
made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers
may be assigned to fix or establish key specifications for your application. Please consult with your Omron’s representative at
any time to confirm actual specifications of purchased Product.
Errors and Omissions.
Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is
assumed for clerical, typographical or proofreading errors or omissions.
2020.5
In the interest of product improvement, specifications are subject to change without notice.
OMRON Corporation
Industrial Automation Company
http://www.ia.omron.com/ (c)Copyright OMRON Corporation 2020 All Right Reserved.