Eaton Cutler-Hammer QBHW3040H 40A 3P 240V Circuit Breaker, Bolt-On | AmpState

Eaton Cutler-Hammer QBHW3040H is a 40 A, 3-pole, 240 V bolt-on circuit breaker designed for reliable protection in panelboards, load centers, and electrical distribution networks. Built for everyday electrical work, it delivers dependable trip performance when you need it most, and its bolt-on design makes installation and swaps straightforward in compatible panels.

Key specifications

• Amperage: 40 A
• Poles: 3 Poles
• Voltage: 240V
• Mounting: Bolt-On
• Manufacturer: Eaton Cutler-Hammer
• Part Number: QBHW3040H

Why this bolt-on breaker stands out

• Designed for retrofit work and routine maintenance planning where the part number must stay consistent across replacements, preventing fitting surprises and minimizing panel downtime.
• 3-pole, 240 V configuration tailored for three-phase distribution systems and multi-leg protection in commercial or light industrial settings.
• The bolt-on form factor simplifies installation in compatible panels, making field upgrades and service calls faster and more predictable.
• Seamless sourcing through AmpState, with support to confirm fit and compatibility so you can proceed with confidence on replacement projects.

Ideal use scenarios

• Replacing a failed or aging 3-pole breaker in panelboards or load centers without changing surrounding hardware.
• Expanding or updating a three-phase distribution system while maintaining a consistent part-number for easier maintenance records.
• Retrofitting legacy installations that specify bolt-on protection devices for reliable, robust circuit protection.

Available from AmpState, the QBHW3040H is a practical, field-ready solution for electricians who value precise protection, straightforward installation, and consistent parts management in commercial or light-industrial electrical systems. If you’re unsure about compatibility, reach out—we’re ready to help confirm fit and ensure this breaker meets your panel’s requirements.