BQ2B040H– SIEMENS 2P40A 240V BOLT ON 22kA BREAKER

No, they are not interchangeable. The BQ series uses a bolt-on mounting method, meaning it is physically bolted to the bus bar, while the QP series uses a plug-in clip design. Each is designed for specific Siemens/ITE panelboards that support its respective mounting style. Installing the wrong type can result in a poor connection and a safety hazard. Check your panel's label or contact us with your panel model to confirm which breaker type it requires.

The 'H' suffix on the BQ2B040H denotes a higher interrupting rating — in this case, 22kA at 240V — compared to standard BQ breakers rated at a lower kA. This makes the BQ2B040H better suited for installations where the available fault current is higher, such as commercial applications or service panels closer to the utility transformer. Always verify your system's available fault current to ensure the breaker's interrupting rating meets or exceeds it.

Siemens BQ-series breakers can be difficult to source through general electrical supply channels, particularly in specific amp ratings and variants. Northern Breaker Group specializes in hard-to-find and obsolete breakers, and we maintain stock of a wide range of Siemens breakers across our Calgary, Edmonton, and Vancouver locations. Contact us with your quantity and timeline and we'll check availability right away.