Siemens BQ3B05000S01 - 50 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens BQ3B05000S01 is a 50A, 240V, 3-pole bolt-on molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Its secure bolt-on mounting creates a rigid, vibration-resistant bus connection, helping maintain consistent electrical performance even in demanding environments.

Key advantages that set this breaker apart

• Secure bolt-on mounting for a robust, vibration-resistant connection that stays tight over time.
• Thermal-magnetic trip unit provides stable, repeatable protection against overloads and short circuits.
• Compatibility with matching Siemens OEM load centers and panelboards ensures straightforward integration and reliable performance.
• Three-pole design supports three-phase distribution at 240V, making it ideal for commercial and light industrial applications as well as residential panel upgrades that require three-phase protection.
• Rated 50A at 240V to safely interrupt fault currents and protect downstream devices in multi-load panels.

What problems this breaker solves

When panelboard protection is at stake, the BQ3B05000S01 offers predictable, trip-responsive behavior with a design tailored for Siemens ecosystems. The bolt-on mounting minimizes bus connection movement that can occur in vibration-prone environments, while the thermal-magnetic trip mechanism reacts promptly to faults, helping prevent damage to wiring, downstream devices, and connected equipment.

Ideal use scenarios

This breaker is well-suited for:

• Residential, commercial, and light industrial panelboards and load centers that require 3-pole, 50A protection at 240V.
• Panel upgrades or replacements in Siemens-based electrical systems where OEM compatibility is important for performance and warranty alignment.
• Three-phase distribution applications in smaller commercial facilities or equipment where robust fault protection is essential.

Specifications at a glance

• Manufacturer: Siemens
• Part number: BQ3B05000S01
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 50A
• Voltage rating: 240V
• Number of poles: 3-pole
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical installation notes

Ensure compatibility with your Siemens panelboard or load center before installation. Use proper torque and mounting procedures specified for bolt-on breakers to preserve the integrity of the bus connection. This unit is designed to integrate seamlessly within Siemens’ ecosystem, offering dependable protection as part of a cohesive electrical protection strategy.