BQ1B015HH– SIEMENS (HBQ) 1P15A 120V BOLT ON 65kA BREAKER

The BQ1B015HH belongs to Siemens' HBQ series, which is a high-interrupting-capacity bolt-on breaker rated at 65 kA — significantly higher than a standard QP plug-in (10–22 kA) or a typical BL bolt-on (22–42 kA). This makes it the right choice for commercial panelboards or locations where the available fault current exceeds what standard breakers can safely interrupt.

It is a bolt-on breaker, meaning it fastens mechanically to the panelboard bus rather than snapping onto a plug-in rail. This means it will NOT fit plug-in-style Siemens loadcentres (e.g., standard EQ or PL plug-in configurations). You must have a panelboard or loadcentre that is specifically designed to accept bolt-on breakers. Contact us with your panel model and we'll verify compatibility.

In most cases, yes — the BQ1B015HH is the current Siemens HBQ-series equivalent for a 1-pole, 15 A, 120 V bolt-on position. However, always cross-reference the original breaker's amperage, pole count, voltage rating, and interrupting capacity before replacing. If you're unsure whether your existing breaker matches these specs, bring the old part number into one of our Calgary, Edmonton, or Vancouver counters and we'll help you identify the correct replacement.