Westinghouse EHD3040 40A 3P 480V Circuit Breaker | AmpState

Westinghouse EHD3040 is a dependable 40 Amp, 3-pole circuit breaker designed for everyday electrical protection in panelboards, load centers, and distribution networks. Built for replacement projects and reliable spare stocking, this unit helps you keep your BOM aligned with the original part number, ensuring a seamless swap when uptime matters most.

Key specifications at a glance

• Manufacturer: Westinghouse
• Part Number: EHD3040
• Product Type: Circuit Breaker
• Amperage: 40 A
• Poles: 3
• Voltage: 480V

Why this 3-pole 480V breaker stands out

Designed to safeguard 3-phase electrical systems, the EHD3040 delivers consistent, reliable protection across all three conductors in a 480V distribution network. Its OEM design means it drops in alongside Westinghouse or compatible panelboards and load centers without modification, helping maintain system integrity and trip coordination. If your project calls for a genuine BOM-aligned replacement part, this breaker provides a precise, factory-approved fit.

Ideal use cases

• Replacement projects where the original part number must be preserved to avoid compatibility issues
• Spare parts stocking for electrical maintenance teams to minimize downtime
• Upgrading or repairing 3-phase 480V circuits in commercial or industrial facilities
• Panelboard and load center protection where dependable, repeatable performance is required

Practical benefits and outcomes

With the Westinghouse EHD3040, you can expect straightforward installation, reliable tripping behavior for 3-phase loads, and a form factor that matches standard 480V distribution equipment. This makes it easier to source, replace, and maintain critical protection without surprises during commissioning or routine maintenance. By keeping a genuine OEM part on hand, you reduce the risk of compatibility gaps and ensure consistent protective coordination across your electrical system.

How to ensure the right fit

Need help confirming compatibility with your specific panel or BOM? AmpState provides support to verify part fit and ensure you’re ordering the correct EHD3040 for your application. Available from AmpState, and if you’re unsure about the match, simply reach out with your equipment details and we’ll help confirm fit.