Sensata Technologies RD04A Relay

The Sensata Technologies RD04A Relay is a Crydom‑brand solid‑state relay designed to switch AC loads under a low‑voltage control signal, delivering fast, silent operation with no mechanical wear. As part of the Crydom RD family, it provides galvanic isolation between input and output, enabling safe interfacing of controllers such as PLCs, relays, or microcontrollers with higher‑current AC loads used in automation, HVAC, motor control, and heating applications. This compact device is intended for panel or machine mounting, and exact input voltage ranges, output current/voltage ratings, and installation details are specified in Sensata’s official datasheets and application notes.