B370HH – SIEMENS (HBL) 3P70A 240V BOLT ON 65kA BREAKER

The "HH" suffix denotes a high-interrupting-capacity rating of 65kA, compared to the lower AIC ratings found on standard BL/BA frame breakers. This makes the B370HH the right choice for installations where a short-circuit study or local code requires a higher fault-current rating at the breaker location — common in commercial service entrances or panels fed by large transformers.

While the bolt-on BL frame is compatible with some Siemens/ITE residential-style panelboards, the 65kA interrupting rating of the B370HH is primarily targeted at commercial and light-industrial applications where fault current levels are higher. For a typical residential loadcentre, a standard-AIC bolt-on breaker is usually sufficient — contact us and we can help you select the right breaker for your application.

Yes. Sourcing obsolete and hard-to-find Siemens breakers like the B370HH is exactly what we specialize in. We maintain extensive stock and supplier networks across Canada. Reach out to our Calgary, Edmonton, or Vancouver counters, or submit a quote request online, and our team will confirm availability and lead time for you.