857-634 WAGO Signal Relays

Wago 857-634 is a solid-state relay (SSR) designed for plug-in input timing with ON-delay switching. It features push-in CAGE CLAMP spring connections for easy installation and a pre-assembled socket base for convenience. The relay operates with a rated current of 1A (continuous) and includes a yellow LED for status indication. It supports a 2-wire connection and zero-cross switching to minimize electrical noise during operation. The supply voltage ranges from 24Vac to 240Vac (230Vac nominal) output, and it is designed for single-pole / single-phase / 1-pole (1P) applications. The control voltage (DC) spans from 20.4Vdc to 31.2Vdc (24Vdc nominal), with a rated impulse voltage (Uimp) of 0.85 to 1.3 times Uc. The SSR's dimensions are H94mm x W6mm x D81mm, fitting a 6mm width space on a DIN-35 rail. It features normally closed (NC) auxiliary contacts and has a power consumption compatible with DIN-35 rail mounting. The manufacturer specifies the switching ON time as 1ms (0.001 s) and switching OFF time as 10ms (0.010 s). The trip unit type is adjustable with time ranges of 0.1-10s, 3-300s, 0.3-30min, and 3-300min, with a reset time of 50ms. The coating material is designed to withstand 5-85% relative humidity (RH), with no condensation permissible. The degree of protection is rated at IP20, and it operates within an ambient air temperature range for operation of -20°C to +60°C and for storage from -40°C to +70°C.