857-642 WAGO Signal Relays

Wago 857-642 is a fixed-type timing relay module featuring push-in CAGE CLAMP spring connections for secure and maintenance-free wiring. It is designed to handle a rated current of 6A continuously, with specific ratings for different conditions: 3A at 250Vac (AC-15), 2A at 24Vdc (DC-13), and a maximum inrush current of 20A for 20ms at AC. The module offers ON- and OFF-delay switching with two separate adjustable time ranges, indicated by a yellow LED, making it suitable for railway applications. Its electromechanical design supports a recommended minimum switching load of 10V / 10mA / 24V / 1mA. The relay has a resistance of 1C/O / SPDT (Single Pole Double Throw) contact, operates within an ambient air temperature range for storage of -25°C to +70°C, and offers a degree of protection rated at IP20. The control voltage ranges from 16.8-31.2Vdc (24Vdc nominal), with a rated impulse voltage (Uimp) of 4 kV. Its compact dimensions are H94mm x W6mm x D97.8mm, featuring a width of 6mm and utilizing Silver-Tin (AgSnO) contacts. The rated operating voltage (Ue) and the control circuit rated current are designed for a wide range of applications, with an adjustable time range spanning from 0.01 seconds to 100 hours. The module is capable of 50,000 operations at rated voltage (AC) - Phase-to-neutral and has a trip current rating of 5,000,000 operations, ensuring long-term performance. It is mounted on a DIN-35 rail, suitable for environments with 5-95% relative humidity without condensation.