Eaton / Cutler-Hammer CH220ST Miniature Circuit Breaker

This breaker is designed exclusively for Eaton and Cutler-Hammer Type CH load centers. It features a 3/4-inch per pole footprint and will not fit in Type BR or other manufacturers' panels.

The ST suffix indicates a factory-installed shunt trip mechanism. This allows the breaker to be opened remotely by applying a control voltage signal to the shunt trip coil, which is often used for emergency stops or automated disconnects.

The box lugs can accommodate a single copper or aluminum wire from 14 AWG to 8 AWG. They can also accept two wires ranging from 14 AWG to 10 AWG.

As a 2-pole Type CH breaker, it requires two adjacent 3/4-inch spaces on the panel busbar.

Yes. Eaton acquired Cutler-Hammer and continues to manufacture the Type CH line. An Eaton CH220ST is the direct replacement for an older Cutler-Hammer breaker with the exact same catalog number.

No. This is a standard thermal-magnetic breaker equipped with a shunt trip. It provides overload and short-circuit protection but does not include GFCI or AFCI circuitry.

The internal common trip mechanism ensures that if one pole experiences an overload or short circuit, both poles will trip simultaneously to completely disconnect power to the 240V circuit.

The long-time function provides a delayed trip to protect against sustained overloads while allowing temporary inrush currents. The instantaneous magnetic function trips the breaker immediately when it detects a severe short circuit.