The Autonics SRH1-2240-N is a single-phase control device designed for panel or DIN rail mounting with an integrated heatsink to optimize cooling and reliability. It accepts a rated input of 24VAC and can switch a rated load voltage from 24 to 240VAC with a rated load current of 40 A. The device provides solid isolation, featuring a dielectric strength of 2500 VAC at 50/60 Hz for 1 minute between input and output and between input/output and the case. A zero cross turn-on function helps minimize electrical noise, and there is also a random turn-on option. Input status can be checked via a green input LED. Operating conditions include an ambient temperature range of -30 to 80°C, with storage from -30 to 100°C. The rated load current capacity varies with ambient temperature, so consulting the derating curve is recommended for precise limits. Ambient humidity tolerance is 45 to 85% RH, with the same range applicable to storage. The design emphasizes reliability through an integrated heatsink and ceramic board construction. The product supports multiple mounting methods, including DIN rail and screw fixing, to accommodate different installation environments.