ABB MREB-C10-AC2 Relay

ABB MREBC10AC2 (often listed as MREB-C10-AC2) is a miniature, front-mounted electronic timer accessory for ABB contactors and relays. It locks onto MC1/MC2 contactors or MCR relays and provides an ON-delay timing function to sequence downstream equipment. Powered from 24–250 V AC or DC, the timer delivers a programmable delay in the range of 0.5–60 seconds, enabling short sequencing or interlock timing in compact control panels. As an official ABB accessory, it is designed for front-face mounting on compatible contactors and is referenced in ABB catalogs under 1SAL100541R9906. Typical applications include motor starter sequencing, brief interlocks, and timing control in control circuits where a short delay is required before energizing a coil. The device is rated for operation in ambient temperatures up to +55°C, and its compact form factor makes it suitable for tight control cabinets and integrated MCCs.