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Omron relays. General Purpose Relays. MMK

Latching Relay
MMK

Mechanically Latching Relays Based on the MM Power Relay

Open Coils (with Solder Terminals)

Type Contact form Relay model Available rated voltage
Standard DPDT MM2K 100/(110), 200/(220) VAC
12, 24, 48, 100/110, 200/220 VDC
3PDT MM3K 100/(110), 200/(220) VAC
48, 100/110 VDC
4PDT MM4K 200/(220) VAC
12, 24, 48, 100/110, 200/220 VDC
DC-switching DPDT MM2XK 24, 100/110 VDC
3PDT MM3XK 200/(220) VAC
100/110 VDC
4PDT MM4XK 100/(110) VAC
100/110 VDC

Open Coils (with Screw Terminals)

Type Contact form Relay model Available rated voltage
Standard DPDT MM2KB 100/(110), 200/(220) VAC
12, 24, 48, 100/110 VDC
3PDT MM3KB 100/(110), 200/(220) VAC
12, 48, 100/110 VDC
4PDT MM4KB 24, 100/(110), 200/(220) VAC
100/110 VDC
DC-switching DPDT MM2XKB 100/(110), 200/(220) VAC
12, 24, 48, 100/110, 200/220 VDC
3PDT MM3XKB 200/(220) VAC
24, 100/110 VDC
4PDT MM4XKB 24, 48, 100/110, 125, 200/220 VDC

Cased Coils (Plug-in Terminals)

Type Contact form Relay model Available rated voltage
Standard DP MM2KP 6, 12, 24, 100/(110), 200/(220) VAC
12, 24, 48, 100/110, 125, 200/220 VDC
3P MM3KP 24, 100/(110), 200/(220) VAC
6, 12, 24, 48, 100/110, 125, 200/220 VDC
4P MM4KP 24, 100/(110), 200/(220) VAC
6, 12, 24, 48, 100/110, 125, 200/220 VDC
DC-switching DP MM2XKP 24, 100/(110), 200/(220) VAC
12, 24, 48, 100/110, 125, 200/220 VDC
3P MM3XKP 100/(110), 200/(220) VAC
24, 48, 100/110, 125, 200/220 VDC
4P MM4XKP 100/(110), 200/(220) VAC
6, 12, 24, 48, 100/110, 125, 200/220 VDC
Conforming to auxiliary power relay
specifications
4P MM4KP-JD 24, 100/(110), 115, 200/(220) VAC
24, 100/110, 125, 200/220 VDC
Conforming to auxiliary power relay
specifications for DC-switching
4P MM4XKP-JD 100/(110), 115, 200/(220) VAC
24, 48, 100/110, 125, 200/220 VDC

Accessories (Order Separately)

Sockets

Relay DIN Track/Front-connecting Socket Back-connecting Socket
Screw terminals Solder terminals
MM2(X)KP 11PFA
mmk_lineup4_1
PL11
mmk_lineup4_2
MM3(X)KP
MM4(X)KP
14PFA PL15
MM4(X)KP-JD 14PFA ---

Mounting Brackets

Contact form Model
DPDT R99-03 (S KANAGU) FOR MM2K.611K
3PDT R99-03 (S KANAGU) FOR MM3K.612K
4PDT R99-03 (S KANAGU) FOR MM4K.613K

Set Coil

Rated
voltage
(V)
Rated current (mA) Coil
resistance
(Ω)
Set
volt.
Max
volt.
Power
con-
sump-
tion
(VA
or W)
DP 3P, 4P DP 3P,
4P
Open
Relays
Cased Open
Relays
Cased Open
Relays
Cased Open
Relays
Cased
50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz % of rated
voltage
AC 6 790 655 690 590 1,285 1,100 1,165 1,000 1.1 0.46 80%
max.
110
%
Initial:
DP:
Approx.
6.2
3P, 4P:
Approx.
12
Rated:
DP:
Approx.
3.5
(3.9)
3P, 4P:
Approx.
6 (6.6)
*
12 395 325 345 295 640 550 580 500 4.7 1.9
24 195 160 170 145 320 275 290 250 19 8.2
100/
(110)
47 39/45 41 35/40 77 66/76 70 60/68 340 141
200/
(220)
23.5 19.5/
22.5
20.5 17.5/
20
38.5 33/38 35 30/34 1,540 563
DC 6 340 450 17.5 13.4 DP:
Approx.
2.1
3P, 4P:
Approx.
2.7
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
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. Performance characteristic data are measured at a coil temperature of 23°C.
3. The AC coil resistance values are reference values.
4. The maximum voltage is one that is applicable instantaneously to the Relay coil at an ambient temperature of
23°C and not continuously.
* Values in parentheses are for open relays.

Reset Coil

Rated voltage
(V)
Rated current (mA) Coil resistance
(Ω)
Reset voltage Maximum voltage Power consumption
(VA or W)
50 Hz 60 Hz % of rated voltage
AC 6 770 690 2.3 80% max. 110% Initial: Approx. 6.5
Rated: Approx. 4.1
12 385 345 9.2
24 191 170 35
100/(110) 46 41/46 739
200/(220) 23 20/23 3,030
DC 6 422 14.2 Approx. 2.8
12 215 56
24 109 220
48 58 832
100/110 25/27 4,040
200/220 12.2/13.5 16,330
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. Performance characteristic data are measured at a coil temperature of 23°C.
3. The AC coil resistance values are reference values.
4. The maximum voltage is one that is applicable instantaneously to the Relay coil at an ambient temperature of
23°C and not continuously.

Coils (Conforming to Auxiliary Power Relay Specifications)

Rated
voltage
(V)
Rated current
(mA)
Coil
resistance
(Ω)
Set
volt-
age
Reset
volt-
age
Max.
volt-
age
Op-
era-
tion
level
(JEC-
174D)
Power consumption
(VA or W)
Set
coil
Reset
coil
Set
coil
Reset
coil
Set coil Reset coil
50
Hz
60
Hz
50
Hz
60
Hz
% of rated voltage Initial Rated Initial Rated
AC 24 245 210 191 170 8.5 35 80%
max.
80%
max.
110% A Approx.
6.3
Approx.
5.1
Approx.
6.5
Approx.
4.1
100/
(110)
58.5 51/
58
46 41/
46
150 739
110 53 46 42 37.3 182 835
115 51 44 40 35.7 210 885
200/
(220)
29 25.5
/29
23 20.5
/23
620 3,030
220 26.5 23 21 18.6 780 3,420
DC 24 94 109 255 220 Approx. 2.7 Approx. 2.8
48 52 58 930 832
100/
110
22/24.5 25/27 4,500 4,040
125 22 23.5 5,800 5,330
200/
220
11/12 12.2/13.5 18,000 16,330
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.

Contact Ratings

Standard Relays

Item Open Relays:
MM2K(B), MM3K(B), MM4K(B)
Cased Relays:
MM2KP, MM3KP, MM4KP
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 mechanism Single
Contact material Ag
Rated load 10 A at 220 VAC
7 A at 24 VDC
5 A at 220 VAC
4 A at 24 VDC
Rated carry current 10 A 5 A
Max. switching voltage 250 VAC, 250 VDC 250 VAC, 250 VDC
Max. switching current 10 A 5 A
Max. switching power
(reference value)
2,200 VA, 168 W 1,100 VA, 96W

DC-switching Relays

Item Open Relays:
MM2XK(B), MM3XK(B), MM4XK(B)
Cased Relays:
MM2XKP, MM3XKP, MM4XKP
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 mechanism Single
Contact material Ag
Rated load 7 A at 110 VDC 6 A at 110 VDC 5 A at 110 VDC
Rated current flow 10 A 5 A
Max. switching voltage 250 VAC, 250 VDC 250 VAC, 250 VDC
Max. switching current 10 A 5 A
Max. switching power
(reference value)
800 W, 20 VA *1 660 W, 20 VA *1 700 W, 20 VA *1 600 W, 20 VA *1
Note: 1. When switching DC inductive loads at 125 V or more, an unstable region exists for a switching current of between
0.5 and 2.5 A. The Relay will not turn OFF in this region. Use a switching 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.
*1. Refer to Switching an Switching an AC Load with a DC-switching Model ("X" Model) on Data Sheet.

Contacts (Conforming to Auxiliary Power Relay Specifications)

Item MM4KP-JD MM4XKP-JD
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 mechanism Single
Contact material Ag
Rated load 5 A at 220 VAC, 4 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
Note: 1. When switching DC inductive loads at 125 V or more, an unstable region exists for a switching current of between
0.5 and 2.5 A. The Relay will not turn OFF in this region. Use a switching 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.

Characteristics

Item Open or bifurcated-contact Relays
Contact resistance *2 50 mΩ max.
Set time *3 AC: 30 ms max.; DC: 60 ms max. (minimum pulse width for AC and DC: 100 ms)
Reset time *3 30 ms max. (minimum pulse width for AC and DC: 100 ms)
Max. operating frequency Mechanical: 1,800 operations/hr
Electrical: 1,800 operations/hr (under rated load)
Insulation resistance *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, between contacts and
coil, and between set and reset coils
Vibration resistance Destruction: 10 to 55 to 10 Hz, 0.375 mm single amplitude (0.75 mm double amplitude)
Malfunction: 10 to 35 to 10 Hz, 0.5 mm single amplitude (1.0 mm double amplitude)
Shock resistance Destruction: 500 m/s2
Malfunction: 50 m/s2
Endurance Mechanical: 2,500,000 operations min. (at 1,800 operations/hr)
Electrical: 500,000 operations min. (at 1,800 operations/hr under rated load) *5
Error rate (level P)
(Reference value) *6
10 mA at 5 VDC
Ambient temperature Operating: -10°C to 55°C (with no icing or condensation)
Ambient humidity Operating: 5% to 85%
Weight Standard Relays
MM2K: Approx. 255 g
MM3K: Approx. 390 g
MM4K: Approx. 420 g
MM2KP: Approx. 375 g
MM3KP: Approx. 550 g
MM4KP: Approx. 570 g
DC-switching Relays
MM2XK: Approx. 260 g
MM2XK: Approx. 395 g
MM4XK: Approx. 430 g
MM2XKP: Approx. 380 g
MM3XKP: Approx. 555 g
MM4XKP: Approx. 580 g
*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 set or reset 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.

Characteristics (Conforming to Auxiliary Power Relay Specifications)

Vibration resistance Destruction: 10 to 55 to 10 Hz, 0.375 mm single amplitude (0.75 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: 2,500,000 operations min. (at 1,800 operations/hr)
Electrical: 500,000 operations min. (at 1,800 operations/hr under rated load) *2
Error rate (level P)
(Reference value) *3
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 MM4KP-JD: Approx. 570 g
MM4XKP-JD: Approx. 580 g
*1. The data shown above are initial values.
*2. The electrical endurance was measured at an ambient temperature of 23°C.
*3. This value was measured at a switching frequency of 60 operations per minute.

Open Relays with Solder Terminals

MM2(X)K, MM3(X)K, MM4(X)K

MMK Dimensions 2
Note: Connect the common (C) of MM[]XK to positive (+).

Open Relays with Screw Terminals

MM2(X)KB, MM3(X)KB, MM4(X)KB

MMK Dimensions 4
Note: Connect the common (C) of MM[]XKB to positive (+).

Mounting Holes (Direct Mounting)

Note: The tolerance is ±0.2.
MMK Dimensions 5

Mounting Bracket (S Bracket)
R99-03 (S KANAGU) FOR MM[]

MMK Dimensions 6

Cased Relays with Plug-in Terminal

MM2(X)KP

MMK Dimensions 8
Note: It is recommended that 55 mm min. is allowed for this side because the MM2XKP has a curved protective plate on
the side.

MM3(X)KP, MM4(X)KP

MMK Dimensions 9
Note: It is recommended that 73 mm min. is allowed for this side because the MM3XKP and MM4XKP have a curved
protective plate on the side.

MM4KP-JD

MMK Dimensions 10

MM4XKP-JD

MMK Dimensions 11