Littelfuse, Inc. Monitor - Relay Output 350400

The 350400 is a three-phase voltage monitor relay designed for use with 380-480 V ac systems, featuring a SPDT (Form C) relay rated for 600 V ac and 470 VA pilot duty, eliminating the need for a control power transformer. It includes a microcontroller-based circuit with LED diagnostics, a fixed trip delay of 4 seconds for low voltage, and a 2-second delay for phase unbalance or phasing faults. The ambient operating temperature ranges from -40°C to 70°C, and it is mounted using #8 screws. Dimensions are 74.42 mm H × 133.86 mm W × 74.93 mm D, with a weight of 1.05 lbs. It complies with UL 508 and CSA 22.2 No. 14 standards.