Quick verdict
If you need a 100A replacement breaker and have ABB SACE S3 switchgear, this used unit from Critical Parts at USD 149.90 is a strong candidate. It's an OEM molded case circuit breaker removed from a working environment and tested for basic functionality where applicable. The trade-off is the used condition: expect minor cosmetic wear from previous service.
Who it suits
This breaker is best suited for electricians, maintenance planners, or facility engineers working on ABB SACE S3 distribution equipment. If you already have a failed unit with the same part number, this is an obvious replacement path. It's also a reasonable way to keep a spare on hand for a switchgear lineup.
What stands out
The breaker is a genuine OEM part from ABB's SACE S3 series, not a generic substitute. The actual unit pictured is the one you would receive, which helps you assess its physical condition before buying.
Meaningful trade-offs
Because this is a preowned component, you should expect wear-scuffs, marks, or slight fading-even if the breaker functions correctly. The bigger point of attention is compatibility: the part number is AG03018959, so it needs to match the existing unit's poles, voltage, and trip characteristics for a proper fit. Getting this wrong could mean a breaker that doesn't fit or doesn't protect the circuit the way you intend.
Product notes
ABB SACE S3 AG03018959 100A Circuit Breaker
This unit from Critical Parts is a used ABB SACE S3 breaker with a 100A rating. Priced at USD 149.90, it was removed from a working environment and tested for basic functionality where applicable, but it may show minor wear consistent with previous use. The AG03018959 part number is key to matching it with your switchgear.
Bottom line
The ABB SACE S3 breaker is a practical, preowned choice for switchgear protection. It's a genuine OEM part with a transparent price, and the removal-from-service and testing details help you judge its readiness. Go in with realistic expectations about used-condition cosmetics, and the part number should align with what your panel needs.
