Square D Masterpact NW40 4000A Air Circuit Breaker — Manual & Specifications

Square D Circuit Breakers Air Circuit Breakers

Complete technical documentation for Square D / Schneider Electric Masterpact NW40 4000 Amp low voltage air circuit breaker. Drawout design, 42kA–100kA interrupting capacity at 480V. Compatible with Micrologic 2.0, 5.0, 6.0, and 7.0 electronic trip units. Installation manual, wiring diagrams, maintenance procedures, and renewal parts. Available new, remanufactured, and reconditioned from Voyten Electric.

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Need the replacement part?

Voyten Electric stocks parts for this equipment — including EOL and discontinued models.

1-800-458-4001

EOL & Legacy Equipment Support

Is your Square D equipment discontinued or end-of-life? Voyten Electric specializes in sourcing, testing, and shipping replacement parts for legacy electrical equipment. We stock circuit breakers, trip units, motor controls, and accessories for models no longer manufactured.

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