The 425CXX-24A is a heavy-duty power relay manufactured by Struthers-Dunn. It is a single-pole, double-throw (SPDT) relay with an instantaneous make and break contact arrangement. It is suitable for a wide range of applications, including motor control, switching and sequence control, and residential and commercial HVAC applications. It features an operating voltage of 24 VAC, a contact current rating of 20A, a mechanical life of 50,000 cycles, and a 5 second time delay to protect against contact bounce.