Siemens BQ1B035 - 35 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens BQ1B035 — a dependable, single-pole 35A circuit breaker designed for robust branch circuit protection in panelboards and load centers. Rated for 120V, this bolt-on molded case breaker delivers reliable overcurrent and short-circuit protection where space and performance matter.

Why this breaker stands out

• Bolt-on mounting for a secure, vibration-resistant connection. The bolt-on design ensures a rigid bus connection, reducing movement that can lead to arcing or loose contacts in busy electrical panels.
• Thermal-magnetic trip unit for stable protection. This built-in protection reacts to both overloads and short circuits with consistent trip characteristics across temperature changes, helping protect wiring and connected devices.
• OEM panel compatibility. Specifically designed to work with matching Siemens OEM load centers and panelboards, ensuring proper fit, trip curves, and reliable performance.
• Versatile for multiple environments. Suitable for residential, commercial, and light industrial applications where a reliable 1-pole 35A breaker is needed.

Ideal applications and use cases

• Protect lighting and receptacle circuits in homes or small offices where a compact, 1-pole solution is preferred.
• Guard dedicated loads in small commercial spaces, such as pumps, fans, HVAC controls, or other 120V appliances.
• Replace or upgrade aging panels with a breaker that offers consistent trip performance and a solid mechanical connection.
• Use in panelboards that require a bolt-on mounting style for enhanced vibration resistance in environments with equipment or heavy-duty switching.

Technical snapshot

• Manufacturer: Siemens
• Part Number: BQ1B035
• Type: Thermal-magnetic molded case circuit breaker
• Amperage: 35A
• Voltage: 120V
• Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical guidance for a smooth install

When adding or replacing a breaker in Siemens panelboards or load centers, choose the BQ1B035 for a seamless fit and predictable performance. The bolt-on design simplifies mounting and helps maintain a secure bus connection even in panels subject to vibration or frequent door openings. Pair this 35A, 120V unit with the appropriate Siemens panel family to ensure coordinated protection and reliable operation across your electrical system.