857-303 WAGO Signal Relays

Wago 857-303 is a plug-in relay assembly featuring push-in CAGE CLAMP spring connections. It is designed for a rated current of 6A continuous, with specific ratings for AC and DC applications including 3A at 250Vac (AC-15), 2A at 24Vdc (DC-13), and a 20A AC inrush maximum current. The part includes a socket base and ejector, a yellow LED, and an electromechanical design. It supports a 10V / 10mA / 24V / 1mA recommended minimum switching load and has a resistance of 1C/O / SPDT (Single Pole Double Throw) contact. The ambient air temperature for storage ranges from -40°C to +60°C, with a degree of protection rated at IP20. The control voltage (DC) spans 10.2-14.4Vdc (12Vdc nom.), and it has a rated impulse voltage (Uimp) of 4 kV. The net width of the part is specified for DIN-35 rail mounting, with dimensions of H94mm x W6mm x D81mm and a 6mm width. Contacts are made from Silver-Tin (AgSnO), and the rated operating voltage (Ue) supports up to 250Vac max. switching voltage. The relay provides a rated active power for single-pole / 1-pole (1P) applications, with a short circuit breaking rating and a rated voltage (AC) for phase-to-neutral operations. It is designed for a trip current rating of 5 000 000 operations and can operate within 5-85% relative humidity (RH), with no condensation permissible.