Eaton / Cutler-Hammer CH2100-LONG Molded Case Circuit Breaker

The CH2100-LONG features a specialized elongated frame designed for specific legacy load centers and accepts larger wire sizes from 2/0 AWG to 300 kcmil. The standard CH2100 has a compact footprint and typically accepts conductors up to 1/0 AWG.

This breaker is designed exclusively for Eaton and Cutler-Hammer CH series load centers. It requires a plug-on connection and will not fit in BR series panels or enclosures from other manufacturers.

The LI designation stands for Long-Time and Instantaneous trip functions. The long-time delay prevents nuisance tripping from temporary motor inrush currents, while the instantaneous function cuts power immediately during a severe short circuit.

While it is primarily utilized as a main breaker to protect an entire panel, its 100A capacity and plug-on design allow it to feed large subpanels, provided the load center bus and physical space can accommodate the elongated frame.

The oversized box lugs accept both copper and aluminum conductors ranging from 2/0 AWG to 300 kcmil. Because these are exceptionally large conductors for a 100A breaker, ensure your panel has adequate wire bending space before installation.

No, the CH2100-LONG utilizes a plug-on mounting style. It snaps directly onto the bus bar of a compatible CH load center, eliminating the need for mounting screws or bolt-on brackets.

The 10kAIC rating means the breaker can safely interrupt up to 10,000 amps of fault current at 120/240V without sustaining internal damage or causing an arc flash hazard. Always verify that the available fault current at your panel does not exceed this rating.

Eaton CH breakers feature a trip-to-off mechanism. To restore power after a fault has been cleared, push the handle firmly to the OFF position to reset the internal mechanism, then push it back to the ON position.

The thermal element provides a delayed trip in response to mild, continuous overloads, preventing wire insulation damage. The magnetic element provides an instantaneous trip when it detects the massive current spike of a short circuit, protecting the panel from severe thermal and mechanical stress.