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Circuit Breaker

Westinghouse | MC3400M | Circuit Breaker | 400A | 3-Pole | 600V

★★★★★
Amperes 400
Poles 3
Voltage 600
Product Type Circuit Breaker
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Manufacturer :Westinghouse
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Replacement available
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Picture available on request
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CSA / UL Approved
Regular price $510.00
Sale price $510.00 Regular price
Unit price
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Seamless online shopping experience guaranteed with easy shipping and returns policy.

Shop with Confidence: Our Products come with a Reliable Year-Long Warranty.

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Secure transaction
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FREE & fast shipping on orders over $49
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CSA approved with 1 year warranty
Icon
30 day returns
Allen-Bradley LOGIX5000 - In Box! .A Battery Assembly 1756-Ba1 - In Box! .A Battery Assembly 1756-Ba1

Westinghouse | MC3400M | Circuit Breaker | 400A | 3-Pole | 600V

Regular price $510.00
Sale price $510.00 Regular price
Unit price
Product description
Shipping

Meet the Westinghouse MC3400M, a purpose-built 400A circuit breaker engineered for demanding electrical systems. With a 3-pole design rated for 600V, this unit is tailored for maintenance, retrofit, and replacement projects where exact specifications matter—delivering dependable overcurrent protection that aligns with your existing infrastructure.

  • Amperage: 400A
  • Poles: 3-Pole
  • Voltage: 600V
  • Part number: MC3400M
  • Best use: maintenance, retrofit, and replacement where matching specs are required

Compatibility reminder: Confirm fit and ratings before ordering. The part number MC3400M is the most reliable reference for ensuring a seamless match with your panel or enclosure.

Why this Westinghouse breaker stands out

  • Drop-in suitability for systems designed around the MC3400M specification, reducing现场 downtime during replacements or upgrades.
  • Precise 400A capacity paired with a 3-pole configuration supports multi-branch protection in compact, organized distribution assemblies.
  • 600V rating provides clear alignment with mid- to high-voltage industrial and commercial panels, helping maintain system integrity under fault conditions.

Ideal use cases and who benefits

This breaker is a strategic choice for facility managers, electrical contractors, and maintenance teams overseeing Westinghouse-based electrical distributions. It’s particularly suitable for:

  • Replacement in panels that originally specified MC3400M or compatible Westinghouse units
  • Retrofits where upgrading to a higher amperage or different configuration isn’t feasible without preserving the exact electrical characteristics
  • Stocking spare parts for critical infrastructure to minimize downtime when servicing 3-pole, 400A, 600V protection schemes

With the MC3400M, you’re not just replacing a breaker—you’re preserving the reliability and continuity of your electrical system. Always verify the panel’s model and the board’s configuration to ensure the part aligns perfectly with your installation.

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What Our Customers Say

4.9 (38 reviews)

General feedback we often hear from customers purchasing industrial electrical parts.

Verified

Professional-grade feel. No issues reported during commissioning.

Controls · Commissioning

Verified

Arrived in good condition and helped keep our project on schedule.

Project team · Contractor

Verified

Exactly what most contractors expect from an industrial supplier.

Electrical · Commercial

Fast industrial sourcing support

Need help?

  • Request a quote
  • Need a BOM priced for your project
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  • Need an equivalent or replacement
  • Send your part list and get a fast reply

Email us at sales@ampstate.com for pricing, availability, alternates, and project support.

Email for a quote Typical reply: same business day