CSM_MMK_DS_E_5_2
1
Latching Relay
MMK
Mechanically Latching Relays Based on the
MM Power Relay
• Low power consumption due to mechanical latch for economic op-
eration.
• Relays with mixed coil specifications can be produced (e.g., AC set
coil and DC reset coil).
• Operational response fast enough to enable pulse signal power ap-
plications.
• Ambient operating temperature: –10°C to 55°C.
Ordering Information
Models Conforming to Auxiliary Power Relay Specifications
The MM4KP-JD and MM4XKP-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 MM4KP-JD and MM4XKP-JD satisfy the ratings of multi-contact relays provided
in JEC-174D (1979) standards for power auxiliary relays.
These models work at operation level A 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.
■Available Models
Open Coils (with Solder Terminals)
Type Contact form Open structure Cased
Solder terminals Screw terminals Plug-in (octal pins)
terminals
Standard DPDT MM2K MM2KB MM2KP
3PDT MM3K MM3KB MM3KP
4PDT MM4K MM4KB ---
DPDT+DPST-NO --- --- MM4KP
DC-switching DPDT MM2XK MM2XKB MM2XKP
3PDT MM3XK MM3XKB MM3XKP
4PDT MM4XK MM4XKB ---
DPDT+DPST-NO --- --- MM4XKP
Conforming to auxiliary power
relay specifications
DPDT+DPST-NO --- --- MM4KP-JD
MM4XKP-JD
Refer to Safety Precautions for All Relays.
Rated coil voltage
Note: When ordering, add the rated coil voltage to the model number. Rated coil voltages are given in the coil ratings table.
Example: MM2K, 6 VAC
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
MMK
2
Open Coils (with Screw Terminals)
Cased Coils (Plug-in Terminals)
Model Number Legend
1. Contact Form
2: DPDT
3: 3PDT
4: 4PDT (open structure type)/
DPDT+DPST-NO (cased type)
2. Type (see note)
None: Standard
X: DC-switching
3. Terminal Shape
None: Solder
B: Screw
P: Plug-in
Note: The suffix “JD” indicates models conforming to auxiliary power
relay specifications.
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
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
MM@@K@
1 2 3
3
MMK
■Accessories (Order Separately)
Sockets
Mounting Brackets
Specifications
■Coil Ratings
Set Coil
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.
Relay DIN Track/Front-connecting Socket Back-connecting Socket
Screw terminals Solder terminals
MM2(X)KP
MM3(X)KP
MM4(X)KP
14PFA PL15
MM4(X)KP-JD 14PFA ---
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
Rated
voltage (V)
Rated current (mA) Coil resistance
(Ω)
Set
volt.
Max
volt.
Power consumption
(VA or W)
DP 3P, 4P
Open Relays Cased Open Relays Cased
50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz DP 3P, 4P % 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
50 94 78 82 70 154 132 140 120 82 34
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
11PFA
PL11
MMK
4
Reset Coil
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)
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.
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
50 92 82 175
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
Rated
voltage (V)
Rated current (mA) Coil resistance
(Ω)
Set
voltage
Reset
voltage
Max.
voltage
Opera-
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
50 117 102 92 82 36 175
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
5
MMK
■Contact Ratings
Standard Relays
DC-switching Relays
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 page 13.
Contacts (Conforming to Auxiliary Power Relay Specifications)
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.
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 W1,100 VA, 96W
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
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
MMK
6
■Characteristics
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 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)
Note: 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.
Item Open or bifurcated-contact Relays
Contact resistance (see note 2) 50 mΩ max.
Set time (see note 3) AC: 30 ms max.; DC: 60 ms max. (minimum pulse width for AC and DC: 100 ms)
Reset time (see note 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 (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, 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) (see note 5)
Error rate (level P)
(Reference value)
(see note 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 DC-switching Relays
MM2K: Approx. 255 g MM2XK: Approx. 260 g
MM3K: Approx. 390 g MM2XK: Approx. 395 g
MM4K: Approx. 420 g MM4XK: Approx. 430 g
MM2KP: Approx. 375 g MM2XKP: Approx. 380 g
MM3KP: Approx. 550 g MM3XKP: Approx. 555 g
MM4KP: Approx. 570 g MM4XKP: Approx. 580 g
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) (see note 2)
Error rate (level P)
(Reference value)
(see note 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
7
MMK
Engineering Data
■Standard Relays
■DC-switching Relays
Maximum Switching Power
Open Relays
Switching voltage (V)
Cased Relays
Switching current (A)
Switching current (A)
AC resistive load
DC resistive load
DC inductive load
(L/R = 7 ms)
AC inductive load
(cosφ = 0.4)
Switching current (A)
AC resistive load
AC inductive load
(cosφ = 0.4)
DC resistive load
DC inductive load
(L/R = 7 ms)
MM@K(B) MM@KP
Endurance Curves
Open Relays Cased Relays
Switching current (A)
220 VAC resistive load
Inductive load
(cosφ = 0.4)
24 VDC resistive load
Inductive load
L/R = 7 ms
Switching current (A)
220 VAC resistive load
Inductive load
(cosφ = 0.4)
24 VDC resistive load
Inductive load
L/R = 7 ms
10,000
1,000
500
300
5,000
3,000
Endurance (x10 operations)
3
Endurance (x10 operations)
3
10,000
1,000
500
300
5,000
3,000
MM@K(B) MM@KP
Maximum Switching Power
Open Relays
Switching voltage (V)
Cased Relays
Switching voltage (V)
DC inductive load
L/R=7 ms
DC resistive load
DC inductive load
L/R=7 ms
DC resistive load
MM@XK(B) MM@XKP
Switching current (A)
Switching current (A)
MMK
8
■Relays Conforming to Auxiliary Power Relay Specifications
Endurance Curves
Open Relays Cased Relays
Switching current (A)
Switching current (A)
110 VDC resistive load
110 VDC inductive load
(L/R 7 ms)
110 VDC
resistive load
Inductive load
L/R=7 ms
Endurance (x10 operations)
3
10,000
1,000
500
300
5,000
3,000
Endurance (x10 operations)
3
10,000
1,000
500
300
5,000
3,000
MM@XK(B) MM@XKP
9
MMK
Ambient Temperature vs.
Set and Reset Voltage
MM4KP AC (60 Hz)
Ambient Temperature vs.
Coil Temperature Rise
MM4KP 110 VAC (60 Hz)
Malfunctioning Shock
MM4(X)KP
MM4KP DC MM4KP DC
Must-operate and reset voltage (%)
Number of Relays: 5 Set voltage
Reset voltage
Ambient temperature (°C)
Coil temperature rise ( C)
°
Number of Relays: 5
Contact carry current
Set coil
Reset coil
Ambient temperature (°C)
Reset
60 min.
60 min. 60 min.
60 min.
60 min.
60 min.
Unit: m/s
2
Number of samples: 3
Measurement conditions: Impose a shock of
50 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.
Must-operate and reset voltage (%)
Number of Relays: 5 Set voltage
Reset voltage
Ambient temperature (°C)
Coil temperature rise ( C)
Number of Relays: 5
Contact carry current
Set coil
Reset coil
Ambient temperature (°C)
Shock direction
°
MMK
10
Dimensions
Note: All units are in millimeters unless otherwise indicated.
■Open Relays with Solder Terminals
■Open Relays with Screw Terminals
86 max.
44 max.
28
±0.2
50 max.
94 max.
29
±0.2
34
±0.2
MM2(X)K,
MM3(X)K,
MM4(X)K MM2(X)K MM3(X)K
94 max.
63 max.
MM4(X)K
MM2K
15 max.
Two, M4
mounting holes
58.5 max.
Side View
2P 1P 3P 1P2P 4P 2P3P 1P Common C
Stationary A
Stationary B
Set coil
Reset coil
Note: Connect the common (C) of MM@XK to positive (+).
±0.2
22
22
±0.2
MM2(X)KB,
MM3(X)KB,
MM4(X)KB
MM2KB
92 max.
Ten, M3.5 x
5.5 terminal
screws
60 max.
MM2(X)KB
Thirteen,
M3.5 x 5.5
terminal
screws
101 max.
28
±0.2
MM3(X)KB
Sixteen,
M3.5 x 5.5
terminal
screws
68 max.
34
±0.2
101 max.
MM4(X)KB
15 max.
Two, M4
mounting holes 58.5 max.
29
±0.2
Side View
60 max.
2P 1P 2P 1P3P 2P 1P3P4P Common C
Station-
ary A
Station-
ary B
Set
coil
Reset
coil
Note: Connect the common (C) of MM@XKB to positive (+).
Mounting Holes (Direct Mounting)
Note: The tolerance is ±0.2.
Two, 4.5-dia. mounting holes
29±0.2
Dimensions of : l
2-pole: 22±0.2 mm
3-pole: 28±0.2 mm
4-pole: 34±0.2 mm
l
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.
WH
29±0.2 60±0.2 50
D
l
Item R99-03
(S KANAGU)
FOR MM2K.611K
(DPDT)
R99-03
(S KANAGU)
FOR MM3K.612K
(3PDT)
R99-03
(S KANAGU)
FOR MM4K.613K
(4PDT)
l22±0.2 28±0.2 34±0.2
D 71 max. 71 max. 71 max.
W33 max. 39 max. 45 max.
H 6 max. 6 max. 6 max.
11
MMK
■Cased Relays with Plug-in Terminal
Cases on Models for Switching DC Loads
As shown at the right, there are three holes
with a 10-mm diameter in the case.
80.5 max.
Terminal Arrangement/
Internal Connections
(Bottom View)
Note: Connect the common (C) to positive (+).
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 common connections can be ei-
ther all negative or all positive.
Standard Relays
MM2KP
DC-switching Relays
MM2XKP
MM2(X)KP
22
54.5 max. (see note)
119 max.
64.5
max.
3.5 7
MM2KP
5
RESET
SET
RESET
SET
Note: It is recommended that 55 mm min. is allowed
for this side because the MM2XKP has a
curved protective plate on the side.
80.5 max.
Terminal Arrangement/
Internal Connections
(Bottom View)
Note: Connect the common (C) to positive (+).
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 common connections can be either all negative or all positive.
Standard Relays
MM3KP
DC-switching Relays
MM3XKP
MM3(X)KP
MM4(X)KP 72.5 max.
(see note)
123 max.
64.5
max.
MM4KP
MM4KP MM4XKP
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.
Case Protective Plate
Be sure the polarity is
correct when connecting
Exposed Models.
This example is for the MN2XK.
This also applies to models with 3 or 4 poles.
MMK
12
Accessories
■Sockets
Note: When using the MM@KP-JD by itself, the PL15 Back-connecting Socket cannot be used.
■Height with Socket
Relay model DIN Track/Front-connecting Socket Back-connecting Socket
Screw terminals Solder terminals
MM2(X)KP
MM3(X)KP
MM4(X)KP
14PFA PL15
MM4(X)KP-JD 14PFA ---
MM4KP-JD
70.5 max.
72.5 max.
123 max.
64.5
max.
Terminal Arrangement/
Internal Connections
(Bottom View)
Note: The MM4KP-JD is DPDT and
DPST-NO.
MM4XKP-JD
70.5 max.
73 max.
123 max.
64.5
max.
Note: The MM4XKP-JD is DPDT and DPST-
NO. Make sure that all common connec-
tions are the same in polarity. The mark-
ings of the common connections on the
casing all show "+" but the polarity of the
common connections can be either all
negative or all positive.
11PFA
PL11
MM3KP
MM3XKP
MM4KP
MM4XKP
MM4(X)KP-JD 151.5
MM2KP
MM2XKP
151
11PFA 14PFA
155
147.5
DIN Track/Front-connecting Socket Back-connecting Socket
PL11 PL15
124 128
MM2KP
MM2XKP
MM3KP
MM3XKP
MM4KP
MM4XKP
Note: @PFA can be both track-mounted and screw-mounted.
13
MMK
Safety Precautions
Refer to Safety Precautions for All Relays.
■Mounting
Make sure that the Relay is free from iron powder or iron core,
otherwise the iron dust may adhere to the Relay. As a result the
movable contact may not operate properly.
An arc may be generated between the contacts in switching
operation. Be sure to keep combustible objects away from the Relay.
If the arc will have a bad effect around the Relay, the use of a model
with a casing is recommended.
A model switching DC load incorporates an insulation base with a
small built-in permanent magnet. Be sure to keep magnets or ferrous
objects away from the permanent magnet, otherwise the capacity of
the maximum switching current may drop.
The PL Back-connecting Socket must be flush-mounted from the
surface 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.
Be sure to mount the Relay so that the movable contact is in the
downward direction.
■Connection
•When connecting a load to the contact terminals of a model for
switching DC loads (“X” models), consider the polarity of the con-
tact terminals so that the generated arcs on the adjacent poles will
not collide. (For example, if the common connections of the Relay
are all positive or all negative, no arc collision will occur.)
•Use proper crimp terminals or 1.2- to 2-mm-dia. single-conductor
wire to connect screw terminals.
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 ter-
minal is 1.27 N • m and the insertion force is 49 N for 10 s.
Solder Terminal Model
Make sure that Relay terminals are free of flux or other foreign sub-
stance before soldering the Relay terminals. Finish soldering the
Relay terminals quickly, otherwise the coil wire may be broken.
■Circuits
•You cannot use single contact to demagnetize the set coil as shown
below.
•NC contacts can remain open for a few milliseconds when the reset
coil turns ON and OFF. NO contact can remain open for a few milli-
seconds when the set coil turns ON and OFF while the Relay is
latched. Design your circuits to allow for this.
•Do not allow voltage to be applied simultaneously to both the set
and reset coil. If voltage is applied simultaneously, the Relay will be
set.
•There is no reason to apply voltage to Latching Relays continu-
ously because they will latch properly with a single pulse of suffi-
cient width. Continuously applying voltage will only waste power.
•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.
•Arcing when switching DC power can cause nitric gas to be
generated. The case of the MM@XKP contains holes to allow the
gas to escape. This, however, makes it possible for dust and dirt to
enter the case. Be sure to use the MM@XKP in a suitable
environment.
■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.
MMK MMK
Normal mounting direction
To p
Bottom
Latching Relay coil
NC contact of the Relay
Load
MMK contact
(NC)
The contact
may fail to
hold itself.
Relay coil
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.
2014.10
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 2014 All Right Reserved.
Mouser Electronics
Authorized Distributor
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11PFA 14PFA MM2KP-AC120 MM2KP-AC24 MM4KP DC24 MM4KP-AC120 MM4KP-AC200/220 MM4XKP-
DC125 MM2KP AC200 MM2KP AC220 MM2XKP DC125 MM3XKP DC125 MM4KP AC110 MM4KP DC100/110
MM4KP DC125 MM4XKP AC100/(110) MM4XKP AC125 MM2KB AC100/(110) MM2KP DC100/110 MM3KP DC12
MM4XKP DC24 MM4XKP-JD DC100/110