Siemens BQD220 - 20 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Introducing the Siemens BQD220 — a 20A, 480V, 2-pole bolt-on molded case circuit breaker designed for durable, reliable protection in panelboards and load centers. Built to guard branches against overcurrent and short-circuit events, this unit blends rugged construction with precise, repeatable trip performance to keep electrical systems safe in demanding environments.

Why the BQD220 stands out

• Secure bolt-on mounting delivers a rigid, vibration-resistant bus connection, maintaining a dependable electrical path even in environments with movement or machinery activity.
• Thermal-magnetic trip unit provides stable, repeatable protection by responding to both overloads (thermal) and short-circuit surges (magnetic) with fast, coordinated actuation.
• 2-pole design at 480V accurately protects two hot conductors simultaneously, making it ideal for multi-wire circuits and higher-voltage panel configurations.
• OEM-compatible engineered to fit matching Siemens load centers and panelboards, simplifying replacements and upgrades without adapters or aftermarket modifications.
• Durable molded case construction combines long-term reliability with ease of maintenance, suited for residential, commercial, and light industrial applications.

Technical snapshot

• Manufacturer: Siemens
• Part Number: BQD220
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 480V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

• Residential service panels where robust protection and reliable operation are essential.
• Commercial electrical enclosures and distribution boards requiring secure mounting in high-vibration environments.
• Light industrial panels and equipment feeders where precise thermal-magnetic protection helps minimize nuisance trips.
• Panelboard upgrades or replacements that demand OEM-grade compatibility and straightforward installation.

Practical guidance for deployment

For best results, pair the Siemens BQD220 with compatible Siemens load centers to ensure seamless electrical coordination and unified protection characteristics. Confirm that the panelboard rating matches 480V systems and that your application requires a 2-pole, 20A device. When installing, rely on the bolt-on mounting to achieve a solid connection that resists loosening over time, and test the protection scheme under normal operating conditions to verify the thermal-magnetic trip response aligns with system protection goals.

Engineered for reliability in everyday and demanding electrical environments, the Siemens BQD220 delivers targeted, dependable overcurrent and short-circuit protection where it matters most — in panelboards and load centers that power homes, businesses, and light industrial equipment.