Siemens BF220 A - 20 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Siemens BF220A is a dependable, straight-forward safeguard for your electrical system: a 20A, 240V, 2-pole bolt-on molded case circuit breaker designed to protect branch circuits from overcurrent and short circuits. Engineered to integrate seamlessly with Siemens OEM panelboards and loadcenters, this breaker delivers precise protection where it matters most—inside residential, commercial, and light industrial distributions.

• Bolt-on mounting for a rigid, vibration-resistant bus connection — a secure fit that helps maintain consistent electrical contact and reduces nuisance trips due to movement or vibration.
• Thermal-magnetic trip unit — combines overload protection (thermal) with short-circuit protection (magnetic) for stable, repeatable response across varying loads and conditions.
• OEM-compatible reliability — specifically designed to match Siemens load centers and panelboards, ensuring compatibility, easy replacement, and streamlined installation.

Technical specifications

• Manufacturer: Siemens
• Part Number: BF220A
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

Install the BF220A in panelboards and loadcenters where a compact, reliable 2-pole solution is needed to protect 20-amp branch circuits. It’s well-suited for residential subpanels, small commercial distributions, and light industrial feeders where vibration resistance and durable connection matter. If you’re replacing a worn breaker or upgrading a panelboard, the BF220A offers a seamless fit with Siemens’ own families of equipment, reducing compatibility concerns and installation time.

Why this breaker stands out

Beyond its basic specs, the BF220A focuses on real-world reliability:

• Secure, bolt-on mounting eliminates loose connections that can cause intermittent trips.
• The thermal-magnetic mechanism provides a predictable, calibrated protection curve ideal for varied loads and duty cycles.
• Designed to slot into Siemens panel ecosystems without adapters, ensuring consistent performance and easier maintenance.

Practical tips for best results

• Verify that your panelboard is compatible with the BF220A to ensure proper fit and labeling.
• Follow standard electrical codes and Siemens installation guidelines when wiring and securing the breaker.
• Use this 20A, 240V breaker to protect individual branch circuits that require reliable limit protection and quick interruption in the event of a fault.