What is the difference between AC Breakers and DC Breakers?

Difference between AC Breakers and DC Breakers

The fundamental difference is how the arc is extinguished:

• AC breakers use current zero,

• DC breakers require unique mechanisms owing to continuous current flow.

Parameters AC Breaker DC Breaker
Current Type It is designed for use with alternating current (AC). The design is intended for direct current (DC).
Arc Extinction Because of the natural current zero, it is simpler. Harder since there is no natural current zero.
Arc Quenching Method Utilizes the current zero crossing in order to put out the arc Needs magnetic blow-out, vacuum, (or) other procedures.
Contact Design Reduced complexity as a result of its self-extinguishing capacity Handling extended arcing is complex.
Breaking Capacity Typically lower for a given voltage. Higher due to the more challenging arc control.
Applications Widely utilized in power transmission and distribution. Used in DC systems like solar, battery banks, and traction.
Cost Generally less expensive. Generally more expensive because of design.