Eaton / Westinghouse F3005 Molded Case Circuit Breaker

The F3005 is a bolt-on breaker designed to integrate seamlessly into legacy Westinghouse panelboards, Eaton F-Frame enclosures, and compatible motor control centers.

Westinghouse distribution equipment is now manufactured by Eaton. The F3005 is a legacy F-frame breaker, and modern Eaton Series C F-frame breakers, such as the EHD3005 or FD3005, typically serve as direct replacements. Always verify that the modern breaker meets your required interrupting capacity before installation.

The LI designation indicates that this thermal magnetic breaker provides Long-Time (L) and Instantaneous (I) trip functions. The Long-Time function protects against sustained overloads, while the Instantaneous function protects against short circuits.

While the F3005 has a continuous current rating of 5 amps, the 5-15 ampere trip range refers to its fixed instantaneous magnetic trip threshold. The breaker will trip immediately without intentional delay when it detects a fault current within this specific range.

The standard lugs on the F3005 accept wire gauges ranging from 14 AWG up to 1/0 AWG. Ensure proper torque specifications are followed during installation to maintain a secure and compliant connection.

Yes, the F3005 is rated for use in DC systems up to 250VDC, providing an interrupting capacity of 10kA. This makes it suitable for industrial control panels and DC applications requiring a 3-pole, 5A thermal magnetic breaker.

Always verify that the interrupting capacity of the replacement breaker meets or exceeds the available fault current of your system. Ensure the panel is fully de-energized before unbolting the old breaker, and inspect the existing busbar connections for signs of pitting or thermal damage.