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Is there a replacement main breaker for an old Q1 panel with a 2-pole 100A main circuit breaker that mounts across the bus?

Product Line:
Circuit Breakers

Electrical Distribution Equipment, QOB20M100, QO12M

The replacement main breaker was a Q12100TF, however this breaker is obsolete.
In some cases it may be possible to use a QO2100 breaker if the supply wires are long enough. Also, there is NO current retaining kits that can be used, if required.

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