Siemens BQ2B04000S01 - 40 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Siemens BQ2B04000S01 is a robust 40A, 240V, 2-pole bolt-on molded case circuit breaker designed to protect your electrical distribution system from overcurrent and short circuits. Built for dependable performance in panelboards and load centers, this breaker ensures reliable protection where it matters most—from everyday residential circuits to light commercial and industrial applications.

• Secure bolt-on mounting for a rigid, vibration-resistant bus connection. This design minimizes movement and maintains a solid electrical interface even in environments with vibration or heavy loads.
• Thermal-magnetic trip unit for stable, repeatable protection performance. Combines instantaneous short-circuit protection with thermal overload sensing to respond accurately to rising fault currents.
• OEM-compatible design. Specifically engineered to be compatible with matching Siemens OEM load centers and panelboards for seamless integration and dependable operation.
• Versatile for multiple settings. Suitable for residential, commercial, and light industrial applications, making it a reliable choice for a wide range of distribution needs.

Applications and use scenarios

Use Siemens BQ2B04000S01 as the protective backbone for branch circuits in new installations or as a replacement for aging breakers. Its bolt-on mounting is ideal when a secure, weather-resistant bus connection is critical, such as in panelboards located in garages, basements, or electrical rooms, and in light commercial service panels where dependable trip performance is essential.

Technical specifications

• Manufacturer: Siemens
• Part Number: BQ2B04000S01
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choosing the Siemens BQ2B04000S01 means opting for a proven, mission-critical component that enhances the reliability of your electrical distribution. Its combination of secure mounting, consistent protection, and OEM compatibility helps ensure long-term performance and easier serviceability across residential, commercial, and light industrial installations.