Littelfuse, Inc. Monitor - Relay Output 50R-100

The 50R-100 is a single-phase voltage monitor designed to protect motors in applications such as fans, compressors, air conditioners, and pumps by detecting low-voltage conditions and deactivating its output relay after a 4-second trip delay. It operates on 95-120 V ac at 50/60 Hz, with a fixed trip point at 90% of setpoint and reset at 93%, returning to service after a 2-second restart delay. The relay is rated for 10 A at 240 V ac and 480 VA pilot duty, with terminal torque of 7 in.-lbs. and wire support for 12-18 AWG. It measures 74.4 mm H × 133.9 mm W × 74.9 mm D and mounts with #8 screws. The device meets UL 508 and IEC 60947-6-2 standards, operates from -20°C to 70°C, and withstands IEC 61000-4-2 and IEC 61000-4-4 ESD and transient events. Maximum input power is 5 W.