BQ3B020– SIEMENS 3P20A 240V BOLT ON 10kA BREAKER

Both the BQ and BL series are bolt-on breakers for Siemens/ITE panelboards, but they differ in interrupting rating and physical design. The BQ series (like the BQ3B020) is typically rated at 10 kA, while the BL series carries a higher interrupting rating. They are generally not interchangeable, so always match the exact series specified on your panel's breaker directory or label.

In many cases, yes — Siemens acquired ITE, and BQ-series bolt-on breakers are often compatible with legacy ITE bolt-on style panelboards. However, compatibility depends on the specific panel model and bus design. Contact us with your panel model number and we can help confirm whether the BQ3B020 is a suitable direct replacement.

Yes. The BQ3B020 is a 3-pole, 240 V, 20 A breaker with a 10 kA interrupting rating, making it appropriate for three-phase branch-circuit protection in light commercial or residential applications where the available fault current does not exceed 10 kA. For installations with higher fault current levels, a higher-rated breaker (such as a BL-series) may be required to meet Canadian Electrical Code requirements.