HFB1040 | Circuit Breaker | 40A | 1-Pole | 277V

The HFB1040 circuit breaker delivers reliable overcurrent protection for 277-volt industrial applications. With a 40-amp rating and a single-pole design, it’s purpose-built for maintenance, retrofit, and replacement projects where precise specifications matter.

Key specifications

• Amperage: 40 A
• Poles: 1-Pole
• Voltage: 277 V
• Part number reference: HFB1040

Why this HFB1040 stands apart

Designed for industrial panels where 277V circuits are commonplace, this 1-pole breaker combines a straightforward form factor with precise 40A protection. It’s built to minimize downtime during maintenance and retrofit projects, providing dependable shutoff when overcurrent occurs and seamless compatibility with standard mounting schemes used in commercial environments. The clear alignment of amperage, voltage, and pole configuration ensures you’re selecting a device that matches the exact needs of your circuit.

Ideal use scenarios

• Retrofit of existing 277V single-pole circuits in commercial or industrial panels
• Replacement for a failed 40A, 277V breaker in service and maintenance outages
• Protection for lighting feeders and other 277V branch circuits in warehouses, factories, and facilities

Compatibility and installation tips

Notes: Confirm fit and ratings before ordering. Part number is the best reference for compatibility. When evaluating this breaker, double-check that your circuit requires 277V, a 40A rating, and a 1-Pole configuration to ensure a seamless fit in your panel.

Technical snapshot

• Application: Industrial electrical panels and control circuits
• Protection type: Overcurrent protection for 277V systems
• Mounting considerations: Suited for standard single-pole breaker slots in compatible panels
• Reliability focus: Built for maintenance, retrofit, and replacement where exact specs matter