The Space Age SSU-MR-821/T is a single-position dual-relay module. It mounts on a 3.5-inch snap track. The position holds two independent SPDT relays. As a result, one compact module switches two separate circuits.
Space Age SSU-MR-821/T relay features
First, both relays operate from a 24VDC control input. The inputs are polarity sensitive and diode protected. In addition, each relay has its own red LED. That LED lights when the relay coil is energized. Therefore, status is easy to confirm.
This module belongs to the MR-820 dual-relay series. Furthermore, units snap apart from a standard eight-module assembly. As a result, you can use a single module on its own.
Specifications
- Configuration: dual independent SPDT relays, one module position
- Control input: 24VDC, polarity sensitive and diode protected
- Power: 24VDC @ 17mA per position
- Coil: 24VDC nominal; pick-up 19.2VDC; drop-out 3.6VDC; max 26.4VDC
- Contact rating (resistive): 40mA @ 115VAC; 2A @ 30VDC
- Contact rating (inductive): 20mA @ 115VAC; 1A @ 30VDC
- Energized indicator: red LED per relay
- Mounting: 3.5-inch snap track with screws (included)
- Listing: UL Recognized relays
Applications
This module suits high-density, low-current switching tasks. For example, it can drive control inputs, pilot circuits, or interface points. Finally, the dual-relay design saves panel space.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 0.3 lbs |
|---|---|
| Dimensions | 6 × 4 × 3.5 in |
| Condition | New |
| Manufacturers | Securitron |
| Part Type | Replacement Part |






