Overview Reviews Product Description Merlin Gerin NJS400 A Circuit Breaker 400A 480/600V 3P Compact Molded Case Switch. Product Videos Custom Field Amp 400 Volts 600 Poles 3 Product Reviews Write a Review Write a Review × Merlin Gerin Merlin Gerin NJS400 A Circuit Breaker 400A 480/600V 3P Compact Molded Case Switch Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *