Siemens BQ1B02000S01 - 20 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Siemens BQ1B02000S01 is a compact, reliable bolt-on molded case circuit breaker designed to protect residential, commercial, and light industrial circuits. At 20A and 120V, this 1-pole device provides precise overcurrent and short-circuit protection for branch circuits in panelboards and load centers, keeping electrical systems safe and uptime high.

• Bolt-on mounting: secure, vibration-resistant bus connections that stay tight even in demanding environments.
• Thermal-magnetic trip unit: combines overload protection with fast short-circuit clearing for stable, repeatable protection performance.
• One-pole, 20A, 120V: a focused protection solution for individual circuits in step with standard residential and light commercial electrical layouts.
• OEM-compatible: engineered to pair with Siemens matching load centers and panelboards for a cohesive, dependable protection system.
• Versatile application: ideal for branch circuit protection in homes, small offices, retail spaces, and light industrial environments.

Why choose this breaker? The bolt-on design not only simplifies installation but also enhances long-term reliability by delivering a solid, bus-rated connection. The thermal-magnetic trip ensures consistent response to overcurrent while staying resilient to minor electrical fluctuations—so you’re less likely to experience nuisance trips and more likely to protect wiring, devices, and personnel.

Ideal use cases

• Residential subpanels protecting lighting, receptacle circuits, or dedicated appliance circuits.
• Commercial panelboards powering small office equipment, convenience outlets, or HVAC accessory circuits.
• Light industrial applications where dependable, straightforward overcurrent protection is needed without complex trip coordination.

Technical details at a glance

• Manufacturer: Siemens
• Part Number: BQ1B02000S01
• Type: Thermal-magnetic molded case circuit breaker
• Amperage: 20A
• Voltage: 120V
• Poles: 1
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

For installers and property owners seeking a dependable, easy-to-integrate protection solution, the Siemens BQ1B02000S01 delivers precision protection with rugged, maintenance-friendly construction. Pair it with compatible Siemens load centers to ensure consistent performance across your electrical system and reduce troubleshooting time when circuits are loaded or reconfigured.