MR-310/320 Series Low Voltage Control Relays

MR 300 Series Relays provide virtually endless options for low-voltage application interconnectability. This robust relay is available in SPDT or DPDT configurations. Available in enclosure, snap-track or spacer mounted versions and single or multi-unit assemblies. Enclosure configurations available with red or gray covers and provide 'energized on' LED viewing port(s). No special tools are required for installation. Industrial/commercial sized PCB.

The MR3 utilizes all pre-qualified, reliable hi-grade U.L. recognized components. Trip circuitry is 100 percent opto-isolated for complete non-interference and protection. Easy reversible selectability for trip/host voltages, low and ultra-low current trip operation which allows proper matching of trip to type of load switched (no tools necessary). Both trip and host inputs are diode protected against accidental reversed polarity DC hook-up. These relays are polarized so that either or both may be supervised and/or utilize input voltage logic for complex multi-criteria operations. Both trip and host are universal for use with standard TTL, fire, security and building control voltages.

  • 100% opto-isolated
  • Low/Ultra-low current trip operation
  • Diode protected against accidental reverse polarity hook-up
  • LED light that indicates coil operation

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Option Contact Rating (in Amps) Contact Type Enclosure Input Voltage Positions Price Purchase
SSU-MR-311/C
SSU-MR-311/C
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, SPDT, 1 Position, Grey Enclosure
SSU-MR-311/C
7-10 SPDT Grey Enclosure 24VDC 1
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SSU-MR-311/C/R
SSU-MR-311/C/R
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, SPDT, 1 Position, Red Enclosure
SSU-MR-311/C/R
7-10 SPDT Red Enclosure 24VDC 1
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SSU-MR-311/T
SSU-MR-311/T
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, SPDT, 1 Position, Track-Mount Enclosure
SSU-MR-311/T
7-10 SPDT Track-Mount 24VDC 1
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SSU-MR-312/C
SSU-MR-312/C
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, SPDT, 2 Position, Grey Enclosure
SSU-MR-312/C
7-10 SPDT Grey Enclosure 24VDC 2
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SSU-MR-312/C/R
SSU-MR-312/C/R
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, SPDT, 2 Position, Red Enclosure
SSU-MR-312/C/R
7-10 SPDT Red Enclosure 24VDC 2
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SSU-MR-312/T
SSU-MR-312/T
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, SPDT, 2 Position, Track-Mount Enclosure
SSU-MR-312/T
7-10 SPDT Track-Mount 24VDC 2
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SSU-MR-313/C
SSU-MR-313/C
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, SPDT, 3 Position, Grey Enclosure
SSU-MR-313/C
7-10 SPDT Grey Enclosure 24VDC 3
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SSU-MR-313/C/R
SSU-MR-313/C/R
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, SPDT, 3 Position, Red Enclosure
SSU-MR-313/C/R
7-10 SPDT Red Enclosure 24VDC 3
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SSU-MR-313/T
SSU-MR-313/T
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, SPDT, 3 Position, Track-Mount Enclosure
SSU-MR-313/T
7-10 SPDT Track-Mount 24VDC 3
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SSU-MR-321/C
SSU-MR-321/C
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, DPDT, 1 Position, Grey Enclosure
SSU-MR-321/C
7-10 DPDT Grey Enclosure 24VDC 1
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SSU-MR-321/C/R
SSU-MR-321/C/R
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, DPDT, 1 Position, Red Enclosure
SSU-MR-321/C/R
7-10 DPDT Red Enclosure 24VDC 1
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SSU-MR-321/T
SSU-MR-321/T
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, DPDT, 1 Position, Track-Mount Enclosure
SSU-MR-321/T
7-10 DPDT Track-Mount 24VDC 1
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SSU-MR-322/C
SSU-MR-322/C
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, DPDT, 2 Position, Grey Enclosure
SSU-MR-322/C
7-10 DPDT Grey Enclosure 24VDC 2
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SSU-MR-322/C/R
SSU-MR-322/C/R
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, DPDT, 2 Position, Red Enclosure
SSU-MR-322/C/R
7-10 DPDT Red Enclosure 24VDC 2
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SSU-MR-322/T
SSU-MR-322/T
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, DPDT, 2 Position, Track-Mount Enclosure
SSU-MR-322/T
7-10 DPDT Track-Mount 24VDC 2
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SSU-MR-323/C
SSU-MR-323/C
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, DPDT, 3 Position, Grey Enclosure
SSU-MR-323/C
7-10 DPDT Grey Enclosure 24VDC 3
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SSU-MR-323/C/R
SSU-MR-323/C/R
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, DPDT, 3 Position, Red Enclosure
SSU-MR-323/C/R
7-10 DPDT Red Enclosure 24VDC 3
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SSU-MR-323/T
SSU-MR-323/T
Low-Voltage, Low-Current, Opto-Isolated Relay, 7-10A, DPDT, 3 Position, Track-Mount Enclosure
SSU-MR-323/T
7-10 DPDT Track-Mount 24VDC 3
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