Westinghouse EHB1040 40A 1P 277V Circuit Breaker, Bolt-On | AmpState

Westinghouse EHB1040 is a purpose-built 40A, 1-pole circuit breaker designed for everyday electrical protection in panelboards, load centers, and distributed electrical systems. With a bolt-on mounting style, this breaker is engineered for fast, secure installation in compatible panels, making it a practical choice for both maintenance teams and panel builders who demand dependable performance and exact part-number matches.

Key specifications at a glance

• Brand / Part: Westinghouse EHB1040
• Amperage: 40 A
• Poles: 1 Pole
• Voltage: 277V
• Mounting: Bolt-On
• Applications: Circuit protection in panelboards, load centers, and electrical distribution
• Availability: From AmpState

Why this bolt-on breaker stands out

• Efficient, secure installation: The bolt-on design provides a robust connection to bus systems, reducing the risk of loose connections and ensuring consistent protection across your panels.
• Direct part-number match: Specifically chosen for setups requiring the Westinghouse EHB1040, minimizing guesswork during replacements or stocking for future maintenance.
• Optimal for 277V systems: Built to handle commercial and industrial distribution where 277V is common, delivering reliable protection for higher-voltage circuits.
• Reliable protection for essential circuits: Perfect for critical loads in offices, retail environments, and light industrial spaces where dependable circuit interruption safeguards equipment and personnel.

Ideal use cases and who benefits most

• Maintenance crews performing routine panel servicing who need a readily identifiable, compatible spare part.
• Panel builders assembling or refurbishing distribution centers, offices, or commercial facilities that run 277V circuits.
• Warehouse operations stocking spare inventory with clear part-number traceability to streamline repairs and reduce downtime.

How it compares and practical tips

Compared to generic equivalents, the Westinghouse EHB1040 emphasizes precise compatibility and easy sourcing through AmpState, helping you avoid mismatched replacements that can delay projects. For best results, ensure your panelboard or load center explicitly accepts a bolt-on, 1-pole, 277V breaker in the EHB family. Keep a labeled spare on hand for rapid swaps during preventive maintenance or fault remediation.

Additional considerations

• Stock planning: Align your inventory with common 277V, 1-pole protections to minimize stockouts in high-demand commercial environments.
• Safety and handling: Always power down the panel and follow standard lockout/tagout procedures before replacing breakers.

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