What is the difference between a three-pole and a two-pole circuit breaker?

Three-pole circuit breakers are appropriate for three-phase supplies, whereas two-pole breakers are best for single-phase AC circuits.

EATON CHF Series Standard Circuit Breakers

Eaton CHF-Series standard circuit breakers protect various machinery and equipment connected to the circuit from overcurrent and short circuits.

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Eaton CHF-Series standard circuit breakers have a mechanical trip flag to indicate the trip signal.
They have clamshell packaging for protection against airborne contaminants.
These thermal-magnetic circuit breakers are available in single-pole and two-pole configurations.

Eaton CH-Series Surge Loadcenters: These loadcenters are ideal for use with these circuit breakers for protecting the machinery.