The RS1A40D25 Solid State Relay (SSR) is an industrial mount SSR with a rated load voltage of 400V and a current rating of 25A. It is manufactured by Carlo Gavazzi, and is suitable for switching DC loads. The unit features a zero-crossing output, an LED status indicator, and a 40ms maximum on/off rate. The maximum on-state voltage drop is 1.4V, and the input control voltage range is 3-32V DC. The unit is housed in an IP20-rated plastic enclosure, and is designed for a maximum horizontally mounting distance of 96mm, and a vertical mounting distance of 66mm. It is designed to meet UL, CSA, and CE requirements.