Bolt-On Circuit Breakers

Bolt-on breakers fasten to the bus with a screw instead of plugging in, and are used in commercial panelboards and some residential panels. They only fit panels made for them: Square D QOB for NQ/NQOD panelboards, Eaton BAB and QBHW (Quicklag) for Pow-R-Line panelboards, Siemens BL and BQD, and GE THQB. Match the series printed on your panel label.