Schneider Electric RSB1A120B7 Harmony RSB 12A 1CO 24VAC Interface Plug-in Relay

The Schneider Electric RSB1A120B7 is a Harmony RSB series interface plug-in relay with a single C/O contact rated 12 A and a 24 V AC control coil. It uses flat PCB-type pins for socket mounting, carries a 400 V IEC 60947 insulation rating and a 3.6 kV impulse withstand voltage, and has an IP40 housing rating for general panel-mounted control duty.

Technical Specifications

Certifications & Standards

• CE
• EAC
• UL
• CSA
• CSA C22.2 No 14
• IEC 61810-1
• UL 508

Selection Notes

The flat PCB-type pin and 12 A Ithe rating place this RSB interface relay between the miniature RXM series and the higher-current RPM/RUM power relays, sized for a single contactor coil or small motor-starter pilot circuit. Without a lockable test button, it is intended for socket-mounted panel duty rather than bench commissioning where local forcing is needed. The 400 V IEC 60947 insulation rating and 3.6 kV impulse withstand exceed the RXG series' 250 V rating, giving it more margin on mixed-voltage panels. Its 3000 VA maximum switching capacity and 100,000-cycle B10d life cover general interposing duty between a controller output and a contactor coil.