Littelfuse, Inc. SE-703 Series – Earth-Leakage Monitor SE-703-03-02

The SE-703-03-02 is a microprocessor-based earth-leakage monitor designed for grounded systems, operating on 24 Vac input. It provides adjustable ground-fault detection from 25 mA to 500 mA with trip time settings from instantaneous to 500 ms. The device features two isolated Form C output contacts, harmonic filtering to prevent nuisance tripping, CT-loop monitoring, and a 0-5 V analog output. It is conformally coated, supports fail-safe or selectable output modes, and complies with AS/NZS 2081:2002. Mounting options include DIN rail or surface installation, with panel mounting requiring the PMA-60 adapter. Dimensions are 75 mm high, 55 mm wide, and 115 mm deep. The unit is CSA certified, UL Listed, CE marked, and RCM compliant.