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MMK
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Latching Relay Mechanically Latching Relays Based on the MM Power Relay • Low power consumption due to mechanical latch for economic operation. • 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 applications. • Ambient operating temperature: –10°C to 55°C. Refer to Safety Precautions for All Relays. Ordering Information Type Contact form Open structure Solder terminals Screw terminals Plug-in (octal pins) terminals Conforming to auxiliary power DPDT+DPST-NO relay specifications 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. 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 Rated coil voltage ■ Available Models Open Coils (with Solder Terminals) Type Standard Contact form Relay model Available rated voltage

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MMK Open Coils (with Screw Terminals) Type Standard Contact form Relay model Available rated voltage Cased Coils (Plug-in Terminals) Type Standard Contact form Relay model Available rated voltage Conforming to auxiliary power relay specifications Conforming to auxiliary power relay specifications for DC-switching Model Number Legend MM@@K@ 1 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...

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■ Accessories (Order Separately) Sockets Relay Back-connecting Socket Screw terminals Solder terminals Mounting Brackets Contact form Specifications ■ Coil Ratings Set Coil Rated voltage (V) Rated current (mA) DP Open Relays 50 Hz Open Relays 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...

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MMK Reset Coil Rated voltage (V) Maximum voltage Initial: Approx. 6.5 Rated: Approx. 4.1 Reset voltage 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...

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■ Contact Ratings Standard Relays Item Open Relays: MM2K(B), MM3K(B), MM4K(B) Resistive load (cosφ = 1) Resistive load (cosφ = 1) Contact mechanism Contact material Rated load Rated carry current Max. switching power (reference value) DC-switching Relays Item Open Relays: MM2XK(B), MM3XK(B), MM4XK(B) Resistive load (cosφ = 1) Contact mechanism Resistive load (cosφ = 1) Contact material Rated load Rated current flow Max. switching power (reference value) 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....

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Open or bifurcated-contact Relays Contact resistance (see note 2) 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) Mechanical: Electrical: Insulation resistance (see note 4) 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: Malfunction: 10 to 55 to 10 Hz, 0.375 mm single amplitude (0.75 mm...

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Engineering Data ■ Standard Relays Maximum Switching Power Open Relays Cased Relays AC inductive load (cosφ = 0.4) DC resistive load AC inductive load (cosφ = 0.4) Endurance Curves Open Relays Cased Relays 220 VAC resistive load Inductive load (cosφ = 0.4) 24 VDC resistive load Inductive load L/R = 7 ms MM@KP Endurance (x10 3 operations) 220 VAC resistive load Inductive load (cosφ = 0.4) 24 VDC resistive load Inductive load L/R = 7 ms ■ DC-switching Relays Maximum Switching Power Open Relays Cased Relays

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MMK Endurance Curves Open Relays Cased Relays MM@XKP 10,000 5,000 3,000 110 VDC resistive load 1,000 500 110 VDC inductive load (L/R 7 ms) 110 VDC resistive load Inductive load L/R=7 ms ■ Relays Conforming to Auxiliary Power Relay Specifications Maximum Switching Power MMX4KP-JD AC inductive load cosφ = 0.4 AC resistive load Switching current (A) 220 VAC resistive load Inductive load cosφ = 0.4 110 VDC resistive load Inductive load L/R = 7 ms 24 VDC resistive load Inductive load L/R = 7 ms

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Set voltage Reset voltage Coil temperature rise (° C) Ambient Temperature vs. Coil Temperature Rise Must-operate and reset voltage (%) Ambient Temperature vs. Set and Reset Voltage Contact carry current Set coil Reset coil Number of samples: 3 Ambient temperature (°C) Set voltage Reset voltage Coil temperature rise ( ° C) Must-operate and reset voltage (%) Measurement conditions: Impose a shock of 50 m/s2 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 carry...

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