Siemens A02JLD64 Auxiliary Switch

Siemens A02JLD64 Auxiliary Switch is a two-pole auxiliary contact kit designed for Siemens JD/LD frame molded-case circuit breakers. It provides two Form C contacts—each SPDT with a normally open and normally closed path—for signaling or interlock circuits without carrying the main load. Rated for up to 480 VAC and 250 VDC, the A02JLD64 adds remote status signaling to control systems and alarms in industrial control schemes. It is intended for use with JD and LD frame molded-case breakers to provide inline status feedback that tracks the breaker position, allowing one contact to feed a PLC or alarm input and the other to serve a second signaling or interlock purpose, depending on the control logic. In practical terms, it enables independent signaling or monitoring of auxiliary circuits without impacting the primary breaker operation.