RF1A23L25 is a single-phase AC solid state relay designed for zero-cross switching applications with a rated operational voltage of 230 VAC (24–280 VAC range) and a rated current of 25 AAC. The device features a 5 VDC control voltage range of 4.25–9.0 VDC, with a pick-up voltage of 4.25 VDC and a maximum response time of 1/2 cycle for both pick-up and drop-out. It incorporates integrated transil overvoltage protection, opto-isolation of 3750 VAC between input and output, and a green LED indicator for control status. The relay is housed in a compact PA66 package with pre-attached thermal interface, Faston terminals for fast installation, and is suitable for resistive loads in confined spaces, offering long lifetime through reduced stress on power semiconductors and compliance with UL508 100k cycles endurance testing.