Littelfuse, Inc. Monitor - Relay Output 250-100-MET

The 250-100-MET is a three-phase voltage and phase monitor designed for 95-120 V ac systems, featuring 2 Form C contacts that operate independently: the left contact energizes under normal voltage conditions and de-energizes upon fault, while the right contact energizes only during reverse-phase conditions and provides no high-voltage protection. It includes adjustable restart delay, a DPDT relay with 10 A @ 240 V ac general purpose rating, and LED diagnostics for fault identification. The unit has a temperature range of -40° to 70 °C, is certified to UL 508 and CSA 22.2 No. 14, and mounts with #8 screws. Dimensions are 74.4 mm H × 133.9 mm W × 74.9 mm D, weighing 1.02 lb.