A1240-10 is a 25-ampere solid-state relay designed for industrial AC switching applications with 90-280 VAC control input and 24-140 VAC output capability. The relay features SCR output technology optimized for heavy industrial loads, with zero voltage or instantaneous turn-on switching options to suit various load types. Key technical characteristics include a maximum on-state voltage drop of 1.15 Vrms at rated current, transient overvoltage rating of 600 Vpk, and thermal resistance of 0.8°C/W (junction to case). The device is UL/CSA/TUV approved and CE compliant to EN60950-1, with EMC compliance to Level 3, making it suitable for demanding industrial control systems, motor drives, heating element control, and other AC load switching applications requiring reliable solid-state switching with minimal maintenance.