Littelfuse SE-135-03 is a conformally coated relay with various relay contacts configurations. It operates in fail-safe or non-fail-safe mode and has IEEE Device Numbers 3GC, 50G, 50N, 51G, and 51N. It supports front-panel and remote N.O. contact reset types, has standard harmonic filtering, and latching/autoreset options. Its communication capabilities include Ethernet. The product has a range of supply voltage options for both AC and DC. It features a test button and standard CT loop monitoring.