Square D Harmony Plug-In Relay — DPDT, 10A, 110 VDC, RUMC22FD
The Square D (Schneider Electric) Harmony RUMC22FD is a DPDT (2 C/O) plug-in relay rated at 10A with a 110 VDC coil voltage. Featuring a cylindrical pin base, AgNi (silver nickel) contacts, a built-in LED indicator, test button, and lock-down door, this relay is designed for reliable control circuit switching in industrial automation and machine control applications.
Key Specifications
- Contact configuration: DPDT (2 C/O)
- Current rating: 10A
- Coil voltage: 110 VDC
- Contact material: AgNi (Silver Nickel)
- Base type: Cylindrical Pin (plug-in)
- Indicator: LED
- Standards: CSA C22.2 No 14, EN/IEC 61810-1, UL 508
- Model: RUMC22FD
- Series: Harmony
- Manufacturer: Square D (Schneider Electric)
Features & Applications
- LED indicator for visual coil energization status
- Test button for manual relay actuation during commissioning and troubleshooting
- Lock-down door prevents accidental relay removal
- Plug-in design for easy replacement without rewiring
- Suitable for most applications up to 10A
The RUMC relay series provides a complete, self-contained switching solution for control panels, machine tools, conveyor systems, and industrial automation equipment. UL 508 and CSA listing ensure compliance with North American panel building standards. Selection guide and spec sheet documentation are available.




