Zinsco replacement circuit breakers are of a unique design that only fit into load centers (no longer made) that may be labeled Challenger, Sylvania, or Zinsco.
| Amperage | 100A | 
| Number Of Poles | 2-Pole | 
| Interruption Type | Standard Trip | 
| Voltage | 120V/240V | 
| Frame Size | 2-Space | 
| Breaker Size | 3/4 In. | 
| Mount Type | Z Plug-In For Zinsco QC Series | 
| UL Listed | Yes | 
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