Siemens BQ2B05000S01 - 50 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Siemens BQ2B05000S01 is a 50A, 240V, 2-pole bolt-on molded case circuit breaker designed for dependable branch circuit protection in panelboards and loadcenters.

Its secure bolt-on mounting delivers a rigid, vibration-resistant bus connection, keeping the breaker firmly in place even in panels subjected to movement or frequent access. The built-in thermal-magnetic trip unit combines precise overload protection with instantaneous action for short circuits, providing stable, repeatable protection performance and helping to minimize nuisance trips.

• Bolt-on mounting for a robust, vibration-resistant connection to the panel’s bus bars
• Thermal-magnetic trip delivers reliable overload protection with fast short-circuit interruption
• OEM compatibility designed to drop into Siemens matching load centers and panelboards for straightforward retrofits
• Versatile use suitable for residential, commercial, and light industrial electrical distributions

Technical specifications

• Manufacturer: Siemens
• Part Number: BQ2B05000S01
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 50A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Why this breaker fits your panel and protection needs

Whether you’re upgrading an existing panel or outfitting a new installation, the Siemens BQ2B05000S01 provides dependable, code-aligned protection for mid-size branch circuits. The bolt-on design ensures a solid electrical connection that resists loosening from vibration or thermal cycling, while the thermal-magnetic trip delivers predictable performance under varying load conditions. Its compatibility with Siemens OEM load centers and panelboards simplifies replacements and ensures consistent performance across your distribution system.

Ideal scenarios and use cases

• Upgrading residential panels to support higher-demand circuits without compromising protection
• Commercial panel installations requiring reliable long-term protection against overloads and short circuits
• Light industrial electrical distributions where robust mounting and durable protection are key

Practical installation tips

Before installing, verify that the panelboard is compatible with Siemens OEM breakers and that the bus connection aligns properly with the 2-pole bolt-on design. Follow manufacturer torque specifications for mounting screws and ensure a clean, secure connection to the bus bars to maintain optimal protection performance.

Upgrade your electrical protection with the Siemens BQ2B05000S01—a precise, durable, and compatible solution for safeguarding branch circuits in panelboards and loadcenters.