A2490 is a 90-ampere solid-state relay designed for heavy industrial AC loads operating at 90-280 VAC input control voltage. It features SCR output technology with zero voltage or instantaneous turn-on switching capability, direct bond copper substrate, and a thermal resistance of 0.27°C/W for efficient heat dissipation. The relay is UL/CSA/TUV approved and CE compliant to EN60950-1, with EMC compliance to Level 3, making it suitable for demanding industrial environments. Common applications include motor control, heating element switching, and other high-current AC load management where reliable solid-state switching and thermal performance are essential.