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What does suffix 3903 indicate on a legacy circuit breaker?

Product Line:
Molded Case Circuit Breakers

Resolution:
Suffix 3903 indicates a 1284 1A1B gold flashed auxiliary contact, a 3900 48 VDC undervoltage release, and 48" leads. The suffix also means that the breaker has the customer part number printed on the label and carton.

Schneider Electric USA

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