Siemens BQ1B030 Molded Case Circuit Breaker

Yes. Siemens acquired the ITE and Gould electrical product lines. A modern Siemens BQ1B030 is a direct, form-fit replacement for legacy ITE or Gould BQ1B030 circuit breakers.

No. While both are bolt-on molded case breakers, they have different form factors and bus attachment profiles. BQ breakers feature a centered bus attachment tab for older panelboard designs, whereas BL breakers fit newer Siemens panelboards. Always verify your specific panel's requirements.

No. Standard BQ series bolt-on breakers are supplied with a load-side lug only. The line side is designed to bolt directly onto the panelboard bus bar, so a line-side lug is unnecessary for typical installation.

The difference is the maximum interrupting capacity. This standard BQ1B030 model is rated at 10kAIC. The BQ1B030H is rated at 22kAIC, and the HB1B030 is rated at 65kAIC. All three share the same physical dimensions and panelboard compatibility.

The fixed trip unit provides two layers of protection. The thermal (long-time) element prevents overheating from sustained overloads but allows harmless temporary surges, such as motor inrush currents. The magnetic (instantaneous) element immediately trips the breaker during a severe short-circuit fault.

Yes. The BQ1B030 carries a standard Heating, Air Conditioning, and Refrigeration (HACR) rating. This ensures it is tested and approved to handle the specific inrush currents and continuous loads associated with motor-driven HVAC compressors and fans.

Bolt-on breakers use threaded fasteners to mechanically attach to the panelboard bus bar. This creates a secure, vibration-resistant connection that reduces the risk of arcing or hot spots over time, making them preferred for demanding commercial and industrial applications.