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What is the replacement part for the trip unit interlock of a Masterpact NW breaker?

Broke the white trip unit interlock behind the trip unit.  Masterpact NW. NW breaker trips when it OPENS and red button pops out but no Ap light comes on.  Does not trip when it closes.

Product Line:
Masterpact NW

Masterpact NW Drawout Circuit Breaker

Repair parts

Replace the trip unit base, part# 47947. Replaceable by Square D / Schneider Electric Field Services only.

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