Square D Homeline breakers are compatible with Homeline breaker boxes and CSEDs. Square D QO breakers are compatible with QO breaker boxes and CSEDs. Each ANSI-certified and UL-listed.

Can you use other breakers in a Square D panel?

Manufacturers like Square D warns against the use of Classified and interchangeable breakers. They site the National Electrical Code (NEC) Section 110-3(b), which states that using breakers not listed or labeled is a code violation.

Are Eaton and Square D breakers interchangeable?

Find Old and Obsolete Eaton and Westinghouse Breakers

While you now know that Eaton breakers, Westinghouse breakers, Square D breakers, and Cutler-Hammer breakers are largely compatible, you still need to find the exact models you need for your facility.