Littelfuse, Inc. Monitor - Relay Output 50R4003

The 50R4003 is a single-phase voltage monitor designed for 380-480 V ac input, with a fixed restart delay and an adjustable trip delay of 2-30 seconds. It features a SPDT relay contact rated at 470 VA at 600 V ac, with a low-voltage trip point at 90% of setpoint and reset at 93%. The device includes a 4-second nominal trip delay and 2-second restart delays for both low-voltage and complete power loss conditions. It operates within a temperature range of -20°C to 70°C, is mounted using #8 screws, and measures 74.4 mm H × 133.9 mm W × 74.9 mm D. It complies with UL 508 and IEC 60947-6-2 standards.