The D2490-B is a solid-state relay series 1 with SCR output for heavy industrial loads. Input control voltage range is 3-32 VDC. Operating voltage is 24-280 VAC and the max load current is 90 A. Series 1 relay has redesigned housing with anti-rotation barriers. I/O isolation voltage is 4000 Vrms. Switching type: zero voltage turn-on. Mounting type: panel mount. Output type: normally closed.