Can You Replace a Westinghouse Breaker with a Square D or Eaton?
Published: 2025-06-07 | 6 min read | Category: Technical Guide
Yes, you can replace a Westinghouse circuit breaker with a Square D equivalent in most cases, but it requires a panel replacement or adapter — you cannot simply plug a Square D breaker into a Westinghouse panel. Westinghouse breakers were discontinued when Eaton acquired the Westinghouse electrical division in 1994, and no new Westinghouse breakers have been manufactured for over 30 years. The correct approach is either: (1) find a surplus Westinghouse replacement, (2) use a Cutler-Hammer/Eaton direct replacement (same bus bar design), or (3) replace the entire panel with a modern Square D panel.
Approximately 2.5 million Westinghouse panels remain in service across the US (CPSC estimate), creating steady demand for replacement breakers that are no longer manufactured. Surplus stock is the primary source, with prices ranging from $50-$500+ depending on the frame size and remaining market supply.
Direct Replacement Options for Westinghouse Breakers
The most practical replacement path depends on your Westinghouse breaker series:
| Westinghouse Series | Direct Replacement Brand | Notes | |---|---|---| | Type A (residential) | Eaton BR series | Same bus design, direct fit | | Type BA/HQP | Eaton BR series | Eaton acquired Westinghouse residential line | | Series C (FB/HFB) | Eaton FD/HFD series | Same frame, updated catalog numbers | | Type DA/DB | Eaton JD/HJD series | Same frame dimensions | | DS air circuit breakers | No direct plug-in replacement | Requires surplus DS or panel upgrade |
**Key takeaway:** For most Westinghouse residential and light commercial breakers, Eaton (formerly Cutler-Hammer) makes direct replacements because Eaton acquired Westinghouse's circuit breaker division. The bus bar design is identical — the breaker plugs right in.
When You Need a Surplus Westinghouse Breaker
For Westinghouse air circuit breakers (DS-206, DS-416, DS-632) and certain industrial frames, there is no modern direct replacement that fits the existing switchgear. In these cases, you need either a surplus Westinghouse breaker or a complete switchgear replacement (which can cost $50,000-$200,000+).
AllBreakerSales.com maintains one of the largest remaining inventories of surplus Westinghouse circuit breakers in the US — including DS air circuit breakers, Series C MCCBs, and residential Type A/BA frames. Call **(877) 611-0034** for immediate availability on any Westinghouse catalog number, or use our Cross-Reference Finder to identify the modern equivalent.
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Frequently Asked Questions
Who makes Westinghouse circuit breakers now?
Westinghouse's circuit breaker division was acquired by Eaton (Cutler-Hammer) in the 1990s. Eaton continues to manufacture some Westinghouse-compatible breakers and is the primary source for Westinghouse replacement parts. Some Westinghouse models have direct Eaton equivalents; others require sourcing original surplus or reconditioned stock.
Are Westinghouse and Cutler-Hammer breakers interchangeable?
Some are, some aren't. Eaton acquired Westinghouse's breaker business and produces listed replacements for many Westinghouse models. However, not all Westinghouse breakers have a direct Eaton equivalent — particularly older industrial frames. Always verify the UL listing before substituting.
Can I use a Square D breaker in a Westinghouse panel?
Generally no. Square D breakers are not listed for use in Westinghouse panels. Using an unlisted breaker in a panel violates the NEC and voids the panel's UL listing. The correct approach is to use either original Westinghouse stock or a listed Eaton replacement.