Littelfuse, Inc. Monitor - Relay Output 350200

The 350200 is a three-phase voltage monitor relay designed for applications requiring heavy-duty relays or 480 V control circuits. It operates on 190-240 V ac and features a 15 A general purpose SPDT relay contact. The unit includes microcontroller-based circuitry for monitoring voltage conditions, an advanced LED diagnostic system with five fault-indicating patterns, and a fixed trip delay of 4 seconds for low voltage and 2 seconds for unbalance or phasing faults. It supports a restart delay of 2 seconds after a fault or complete power loss. The device is rated for operation from -40 °C to 70 °C and meets UL 508 and CSA 22.2 No. 14 safety standards. It mounts with #8 screws and has dimensions of 74.42 mm height, 133.86 mm width, and 74.93 mm depth.