WAGO 857-303 JUMPFLEX Relay Module

The WAGO 857-303 (857-303) is a compact DIN-rail mount relay module from the WAGO JUMPFLEX 857 series, engineered for reliable signal isolation, amplification, and switching in industrial automation systems. Designed for high-density control cabinet installations, this 6 mm wide interface module integrates a miniature switching relay with one changeover contact (1 CO / SPDT) rated for a limiting continuous current of up to 6 A. Operating on a nominal input control voltage of 12 VDC, it provides galvanic isolation between sensitive control electronics and peripheral field actuators or loads. The unit features integrated status indication for immediate operational diagnostics and utilizes maintenance-free Push-in CAGE CLAMP spring connection technology for vibration-proof wiring. It is widely used with programmable logic controllers (PLCs), distributed I/O systems, and machinery automation panels across manufacturing, process control, and building automation. The 857-303 easily mounts on standard DIN-35 rails and supports cross-circuit jumping via commoning accessories, simplifying power distribution and minimizing cabinet assembly time.