Schneider Electric RUMC31B7 RUM 3CO 10A Plug-In Relay Harmony Electromechanical Series

The Schneider Electric RUMC31B7 is a plug-in relay from the Harmony Electromechanical Relays series, rated at 10A with a 3CO (3 changeover) contact configuration. Designed for seamless integration into industrial control panels and automation systems, the RUMC31B7 offers reliable switching performance in a compact, plug-in form factor that simplifies installation and replacement. Weighing just 86 g, this relay is engineered for demanding industrial environments where space and efficiency matter.

Technical Specifications

Applications & Use Cases

• Industrial Automation: Ideal for machine control circuits requiring reliable multi-pole switching in PLCs and controller panels.
• Control Panels: The plug-in design allows quick relay replacement without rewiring, reducing maintenance downtime.
• Motor Control: Suitable as an interface relay between control logic and motor starters or contactors.
• Building Automation: Applicable in HVAC, lighting control, and building management systems where 3CO relay switching is required.

Frequently Asked Questions

• What does 3CO mean? 3CO stands for 3 changeover contacts, meaning the relay has three sets of contacts, each capable of switching between normally open (NO) and normally closed (NC) states — providing maximum switching flexibility per relay.
• Is the RUMC31B7 compatible with Schneider relay sockets? Yes, as a plug-in relay, the RUMC31B7 is designed to mount into compatible Schneider Electric relay sockets from the Harmony range, enabling tool-free replacement.
• What is the maximum switching current? The RUMC31B7 is rated for a maximum switching current of 10A across its 3CO contacts.