Double Pole Circuit Breaker 40 Amp"SQUARE D" DOUBLE POLE CIRCUIT BREAKER 240V Square D QO 40A Double Pole Circuit Breaker Qwik Openr circuit breaker protection (trips within 1 60th of a second) on 15 and 20 Amp single pole breakers at currents as low as 150 to 200 Amps Trips thermally (in an overload situation) or magnetically (under a short circuit situation) Quick make quick break mechanism SWD (switching duty) rating on 15 and 20 Amp single pole breakers Plug on design, easy to
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