Allen-Bradley 1492-CB1H040 4A 1P 277V Circuit Breaker | AmpState

The Allen-Bradley 1492-CB1H040 4A 1P 277V Circuit Breaker is a compact yet dependable solution for protecting electrical distribution systems. Designed for panelboards, load centers, and other distribution setups, this single-pole breaker delivers precise overcurrent protection at a 277V rating, making it well-suited for commercial lighting and power circuits where reliability matters most.

• Part Number: 1492-CB1H040
• Manufacturer: Allen-Bradley
• Type: Circuit Breaker
• Amperage: 4 A
• Poles: 1
• Voltage: 277V
• Applications: Panelboards, load centers, electrical distribution
• Ideal for: Retrofit projects and maintenance planning where the part number must stay consistent

Why this model stands out

In environments where panel layouts and wiring schematics rely on a stable, familiar part number, the 1492-CB1H040 provides seamless continuity. The 1P 277V configuration offers targeted protection for circuits that operate at higher commercial voltages, while the 4 A rating ensures protection without unnecessary interruption in lightly loaded, sensitive distributions. As part of the trusted Allen-Bradley family, this breaker is designed for longevity in demanding environments.

Practical use cases

• Retrofit and modernization projects where existing panel inventories rely on the 1492-series part numbers
• Maintenance planning for commercial buildings with 277V lighting and power circuits
• Replacement in panelboards and load centers that require consistent, compatible components
• Temporary protection during service work, ensuring minimal downtime

Compatibility and fit guidance

Ensuring a correct match is essential for reliable protection. If you’re unsure whether this part will fit your panel or if you need to confirm compatibility with your existing 1492-series installations, AmpState can assist. Send a quick note outlining your panel model and current protection scheme, and we’ll help verify fit.

Purchase details

Available from AmpState, the Allen-Bradley 1492-CB1H040 is ready to support your distribution protection needs. For straightforward compatibility confirmation or help locating the exact replacement within your current lineup, simply reach out—our team is ready to assist with fast, informed guidance to keep your project on track.