CHF145

The CHF145 is a 1‑pole, 45 amp thermal‑magnetic molded‑case circuit breaker from Eaton’s CHF family, originally part of the legacy Cooper Industries/Cooper B-Line breaker lineup and now manufactured under the Eaton brand following Eaton’s acquisition of Cooper’s electrical products business. Designed for overcurrent protection in commercial and industrial panelboards and load centers, the CHF145 provides dependable branch‑circuit protection for lighting, receptacles, control circuits, and other low‑current loads in 120 VAC systems. Its compact single‑pole configuration allows efficient use of panel space while delivering reliable protective performance where consistent, basic overcurrent coordination is required.

Electrically, the CHF145 employs a thermal‑magnetic trip unit that combines a heat‑sensitive element for long‑time overload protection with a magnetic instantaneous trip for rapid clearing of short‑circuit conditions. This dual‑element design helps differentiate harmless inrush currents (such as motor starts or transformer energizing) from genuine fault conditions, minimizing nuisance trips while ensuring prompt interruption of dangerous overcurrent events. The breaker is UL 489 listed and typically rated with a 10kA@120V interrupting capacity. Its 45 amp rating makes it suitable for smaller branch circuits and loads in commercial or light‑industrial installations.

Mechanically, the CHF145 features a robust molded case construction and a manual toggle actuator that provides clear ON/OFF status and easy reset after a trip. It is designed for plug‑in mounting into compatible Cooper/Eaton panelboard buses, streamlining installation and replacement without additional hardware. The breaker accepts standard conductor sizes appropriate for its amp rating and integrates with Eaton’s accessory ecosystem—including handle ties and auxiliary contacts where needed. Because the CHF series inherits legacy Cooper B‑Line engineering and is supported through Eaton’s global distribution, the CHF145 remains a practical, code‑compliant choice for reliable, everyday overcurrent protection in branch circuits.

Purchase the CHF145 at Electrical.com, your reliable partner for industrial and commercial electrical products including circuit breakers panel boards, load centers and accessories. Our selection includes manufacturers like Eaton, Cutler Hammer and Westinghouse, backed by a dedicated sales team ready to assist with technical questions, product selection, and support.