NB111040 40A 1P 120V Circuit Breaker, Bolt-On | AmpState

The NB111040 40A 1P 120V Bolt-On Circuit Breaker, stocked by AmpState, is engineered to safeguard panelboards, load centers, and electrical distribution networks. Designed for reliable replacement projects and spare inventory, it helps keep your bill of materials aligned to the original part number without sacrificing performance.

Key Features & Benefits

• Bolt-On mounting for secure, straightforward installation on compatible panels, reducing service downtime.
• Single-pole, 120V configuration protects single-phase circuits commonly found in residential and light commercial distributions.
• 40 A capacity provides dependable protection for branch circuits, helping prevent overloads and electrical faults.
• Replacement-friendly—specifically chosen to align with the original NB111040 part number, making it ideal for BOM consistency and maintenance stocking.
• Availability from AmpState—easy to source and designed to meet typical field replacement needs with support for compatibility checks.

Specifications

• Amperage: 40 A
• Poles: 1
• Voltage: 120V
• Mounting: Bolt-On
• Part Number: NB111040
• Product Type: Circuit Breaker

Ideal Use Cases

• Replacing a failing breaker in panelboards and load centers that specify NB111040 or a compatible bolt-on 1P 120V 40A unit.
• Maintaining BOM integrity during upgrades or routine maintenance by keeping original part numbers in your inventory.
• Stocking spares to minimize downtime when a critical circuit protection device needs immediate replacement.

Compatibility & Support

Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.

Installation & Practical Tips

• Ensure power is fully de-energized before servicing any panel or distribution equipment.
• Verify that the bus bar configuration and mounting provisions on your panel are compatible with a bolt-on, 1-pole 120V breaker.
• Have a licensed electrician perform installations to comply with local electrical codes and safety standards.
• Use NB111040 as a targeted replacement to maintain BOM alignment and streamline future maintenance planning.