Circuit Breakers & Disconnects

Breakers and Disconnect Switches

Match amperage, poles, voltage and panel fit

Ratings decide this one. A replacement breaker has to agree with the original on continuous current, pole count, interrupting rating and trip characteristic, and it still has to physically land in the panel or on the rail it came off. Disconnect and rotary switches bring their own constraints: shaft length, operator handle, and the enclosure the assembly has to live in. Three-pole 600 V devices in the 100 A to 250 A range are typical of what surplus lots bring in, and titles lead with the catalog number, so searching that number beats filtering. Photos show the actual device, contacts and all. Molded-case frames and disconnects also appear among Allen-Bradley parts listed elsewhere on the site.

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