Siemens BQD6120 - 20 A, 347 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Introducing the Siemens BQD6120—a 20A, 347V, 1-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built to perform in residential, commercial, and light industrial environments, this unit combines robust mechanical design with precise protection behavior you can trust.

• Bolt-on mounting for a secure, vibration-resistant connection: a rigid bus contact that stays put even in panels subject to vibration or movement, helping maintain consistent protection over time.
• Thermal-magnetic trip unit for stable, repeatable protection: combines thermal overload protection with magnetic instantaneous trip for fast fault isolation, delivering predictable performance across varying temperatures.
• OEM-compatible compatibility: specifically designed to pair with matching Siemens OEM load centers and panelboards for straightforward installation and reliable integration.
• Versatile application: ideal for residential service upgrades, commercial distribution panels, and light industrial installations where dependable branch-circuit protection matters most.

The BQD6120 is a single-pole, 20-ampere breaker rated for 347V, making it well-suited for commercial lighting circuits and other 347V distribution panels common in multi-tenant buildings and light manufacturing settings. Its molded-case construction adds durability and long-term reliability in spaces where panels face daily use and occasional vibration.

Why choose bolt-on in your panel? Bolt-on breakers like the BQD6120 provide a more solid, vibration-resistant connection than some clip-on designs, reducing the risk of loose contacts that can cause intermittent trips. This makes them particularly well-suited for installations in environments with equipment vibration, door openings, or heavy panel access, where stable performance matters for ongoing uptime.

Use cases at a glance:

• Upgrading or replacing a 1-pole 20A circuit in a Siemens-compatible panelboard
• Protected lighting and receptacle circuits in commercial buildings with 347V distribution
• Small to medium power distribution in light industrial panels where reliability is critical

Technical snapshot

• Manufacturer: Siemens
• Part Number: BQD6120
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 347V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Whether you’re equipping a residential panel with reliable protection or outfitting a commercial or light industrial distribution system, the Siemens BQD6120 delivers precise trip performance, robust mounting, and seamless integration with Siemens OEM panel hardware. Protect circuits, minimize nuisance trips, and keep critical loads safe with a breaker built to perform when it matters most.