Federal Pacific NEF421040R Circuit Breaker, 40A, 2-Pole, 480V

The Federal Pacific NEF421040R circuit breaker is engineered for demanding industrial electrical service, providing dependable overcurrent protection for 40-amp circuits in 480-volt systems. Built by Federal Pacific, this 2-pole unit is designed to safeguard critical equipment, motors, and control panels from overloads and short circuits, helping maintain uptime in manufacturing and facilities environments.

• Manufacturer: Federal Pacific
• Part Number: NEF421040R
• Product Type: Circuit Breaker
• Amperage: 40 A
• Poles: 2
• Voltage: 480V
• Applications: Industrial service, maintenance, and replacement projects
• Compatibility Note: Verify fit by part number and application requirements

Who is this ideal for?

Engineers, maintenance teams, and facilities managers responsible for 480V distribution in industrial settings will benefit from a dedicated 2-pole, 40‑amp solution that fits compatible Federal Pacific panels and equipment. If you’re upgrading an aging panel, replacing a failed breaker, or stocking a spare for mission-critical machinery, the NEF421040R is purpose-built for reliability in demanding environments.

Key benefits and use cases

• Precise overcurrent protection: 40 A rating helps prevent conductor damage and equipment faults by interrupting unsafe current levels before harm occurs.
• Two-pole protection for 480V systems: Simultaneous disconnection of both conductors reduces shock risk and protects multi‑line circuits.
• Industrial-ready design: Built for the kind of ongoing demand and maintenance cycles common in manufacturing floors, distribution panels, and control cabinets.
• Replacement efficiency: When you know the part number (NEF421040R), you can quickly verify compatibility and streamline procurement for repairs and upgrades.
• Compatibility-focused selection: This unit is specifically suited for applications that require a 2-pole 40A device in 480V circuits; always confirm fit by part number and application requirements.

Why the NEF421040R matters for your project

In industrial electrical distributions, selecting the right breaker is about more than current rating. The NEF421040R delivers the appropriate interrupting capability for 480V systems and ensures that both poles trip together, preserving safe shutdown sequences. By choosing the correct part number for your panel and wiring configuration, you reduce the risk of nuisance trips, compatibility issues, and prolonged downtime during maintenance or upgrades.

Compatibility and installation considerations

• Use the part number NEF421040R to confirm compatibility with your Federal Pacific panel or equipment and the specific application requirements.
• Verify that your installation is rated for 480V operation and that a 2-pole, 40A breaker is appropriate for the circuit being protected.
• Follow manufacturer installation guidelines and applicable electrical codes for safe mounting, wiring, and termination.
• If you’re unsure about fit or substitution in your distribution system, contact support for expert compatibility guidance.

Notes: Verify fit by part number and application requirements. Need help matching a part number or confirming compatibility? Message us and we’ll help.