Are these listings in stock or certified?

No. Category pages show PartsPerk-owned observations for sourcing review. Stock, price, trace, and airworthiness stay off the page until a separate publication review.

Can fleet and shop orders be reviewed together?

Yes. Submit quantity, required documents, and need-by date through the sourcing desk. Volume review is human — these pages do not auto-discount.

Electrical

Circuit breakers

Circuit breakers for aviation maintenance and overhaul sourcing. Search by manufacturer part number or NSN. Listings are PartsPerk-owned observations for review — not live inventory or airworthiness approval.

Search PN / NSN Request sourcing

182 owned part identities in this path

Parts in this category

182 PartsPerk-owned part identities in this path.

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Grid Table

All manufacturers JFM KLIXON®KrisMark Group Military Standard Paco Plastics

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Frequently asked questions

How often should circuit breakers be replaced?

Follow the maintenance program and the manufacturer’s cycle or inspection limits. Replace on erratic trip, failed test, or damage — not on a category-page rule of thumb.

Do I need lockout during maintenance?

Lockout/tagout belongs on the work card whenever a circuit must stay open. Note lockout hardware on the RFQ if you need it with the breaker.

What causes a breaker to trip?

Overload, short, and some nuisance thermal conditions. Diagnose the circuit; do not just upsize the breaker from this catalog.

How do I pick the correct part?

Start with the manufacturer part number from the illustrated parts catalog or maintenance manual. If an NSN is listed, search that next. Confirm finish, dash number, and engine or airframe applicability before opening an RFQ.

PartsPerk catalog pages show PartsPerk-owned observations only. They are not live stock, not certification, and not OEM affiliation. Exact PN/NSN identity is for sourcing review; publication and sellability require separate approval.

Circuit breakers

Parts in this category

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