Eaton / Cutler-Hammer EHD3100H08 Molded Case Circuit Breaker

The H08 suffix designates that the breaker is factory-modified for marine applications to meet UL 489 Supplement SA requirements. This includes the use of corrosion-resistant terminals and specific 40 degree Celsius thermal calibration for shipboard environments.

This F-frame breaker is designed for installation in Eaton and Cutler-Hammer Series C panelboards, switchboards, and motor control centers.

Yes, this breaker is rated for 250VDC applications with a 10kA interrupting capacity. When installing in DC systems, multiple poles are typically wired in series depending on the specific grounding and voltage configuration.

No, this breaker utilizes a thermal-magnetic trip unit with fixed thermal and fixed magnetic settings. The long-time and instantaneous trip functions are factory-calibrated and cannot be modified in the field.

The lugs on the EHD3100H08 accommodate wire sizes from 14 AWG up to 1/0 AWG. Due to the H08 marine modification, the terminals are constructed from corrosion-resistant materials, and UL 489 Supplement SA prohibits the use of aluminum conductors with this breaker.

It features a bolt-on mounting configuration. The breaker bolts directly to the panelboard bus, providing a secure mechanical and electrical connection that resists loosening in high-vibration industrial or marine settings.

It is built on the Eaton Series C F-frame platform. Standardized F-frame dimensions allow for straightforward replacement or retrofitting of older Cutler-Hammer F-frame breakers in existing enclosures.

Yes, a 3-pole F-frame breaker can be wired for 2-pole operation. Electricians must follow Eaton wiring guidelines to ensure the load is properly distributed across the active poles.

Yes, Eaton acquired Cutler-Hammer and continues to manufacture the Series C F-frame line. The EHD3100H08 directly replaces older Cutler-Hammer breakers with the exact same catalog number.