Eaton GBH1040 - 40 A, 600 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Eaton GBH1040 is a 40A, 600V, 1-pole bolt-on molded case circuit breaker designed for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Available from AmpState, it delivers a robust solution for both retrofit and new installations.

Why this breaker stands out

• Secure bolt-on mounting: Provides a rigid, vibration-resistant bus connection, preserving electrical integrity in panels subjected to movement or vibration.
• Thermal-magnetic trip unit: Combines thermal overload sensing with magnetic short-circuit protection for stable, repeatable protection performance under varying load conditions.
• OEM panel compatibility: Engineered to be compatible with matching Eaton OEM load centers and panelboards, ensuring a smooth, reliable fit and long-term reliability.
• Versatile for multiple environments: Suitable for residential, commercial, and light industrial applications where single-pole protection is required.

Technical specifications

• Manufacturer: Eaton
• Part Number: GBH1040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40 A
• Voltage Rating: 600 V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases

Ideal for upgrading aging panels or replacing a failed breaker where a bolt-on solution is required. Use it in service panels and load centers that demand a solid mechanical connection and predictable trip characteristics for a 40 A circuit. It’s particularly effective in installations with ventilation or equipment-induced vibrations, where a secure bolt-on connection helps maintain consistent protection.

How this helps you choose

If you need reliable single-pole protection with a secure mounting method and Eaton’s trusted thermal-magnetic technology, the GBH1040 offers a precise fit for compatible panels and a clear path to durable, reusable protection in both new builds and upgrades. Its 40 A rating aligns with common branch circuits, panels, and feeders, while the 600 V rating accommodates a wide range of commercial and light industrial electrical systems.