Siemens BQD150 - 50 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState

The Siemens BQD150 is a rugged 50 A, 277 V, 1-pole bolt-on molded case circuit breaker designed to protect branch circuits in panelboards and load centers. Built for dependable overcurrent and short-circuit protection, this unit is engineered to deliver consistent performance in demanding environments.

Key advantages

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, helping prevent loose connections and nuisance trips in installations subject to vibration or movement.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining long-term overload protection with fast, precise short-circuit trip capability.
• OEM-compatible design is crafted to work smoothly with matching Siemens OEM load centers and panelboards, ensuring straightforward replacement and reliable system integration.
• Versatile application suitable for residential, commercial, and light industrial environments, especially where 277 V circuits are common.

What problems does the BQD150 solve?

• Provides branch circuit overcurrent protection and short-circuit protection to safeguard wiring, devices, and equipment connected to 277 V systems.
• Minimizes downtime with a dependable thermal-magnetic system that reacts precisely to electrical faults while reducing false trips caused by minor inrush or temperature fluctuations.
• Delivers a robust mounting solution that remains secure in installations prone to vibration or mechanical stress, helping to maintain long-term electrical integrity.

Ideal use cases

• Upgrading or replacing a exhausted 50 A circuit breaker in panelboards and load centers that require bolt-on mounting.
• Central commercial lighting or 277 V circuits where reliable, repeatable protection is essential.
• New installations in small to mid-size commercial spaces or light industrial settings that demand a compact, single-pole, 50 A solution.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: BQD150
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 50 A
• Voltage Rating: 277 V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choosing the Siemens BQD150 means prioritizing reliability and compatibility in panelboard ecosystems. Its bolt-on design, combined with a precise thermal-magnetic trip mechanism, makes it a dependable choice for protecting essential circuits in commercial and light industrial environments while maintaining straightforward installation and long-term performance.