Schneider Electric Ssr, Din Rail Mount, 600Vac, 280Vac, 40A; Contact Configuration Schneider Electric/legacy Relay SSR640DIN-AC

SSR640DIN-AC is a solid-state relay with SPST-NO contacts, rated for 40 A rms load current and switching voltages from 48 to 600 VAC, designed for DIN rail mounting. It features zero-cross switching, a green LED input indication, and flexible screw terminals supporting up to AWG 8 (10 mm²). The device has a maximum on-state voltage drop of 1.6 V AC, off-state leakage current of 10 mA rms, and operates within an ambient temperature range of -30 to 80 °C. It is UL, CSA, and CE certified with IP20 protection, and includes an integral heatsink. Input requirements are 90 to 280 VAC or 80 to 140 VDC, with a nominal input impedance of 13 kΩ and input current of 16 mA at rated voltage. The non-repetitive surge current rating is 800 A for one cycle, and the thermal resistance from junction to case is 0.43 °C/W.