Siemens B220 - 20 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Secure, dependable branch‑circuit protection for 240V systems—the Siemens B220 is a 20A, 2‑pole bolt‑on molded‑case circuit breaker designed for panelboards and loadcenters. Its robust bolt‑on mounting delivers a rigid, vibration‑resistant bus connection, helping prevent loose contacts and arcing over time. The thermal‑magnetic trip unit provides stable, repeatable protection against both overloads and short circuits, maintaining accurate response across varying temperatures and load conditions. Compatible with matching OEM loadcenters and panelboards, this breaker is a reliable, ready‑to‑use solution for residential, commercial, and light industrial electrical needs.

• Bolt‑on mounting: secure, vibration‑resistant connection that stays firmly seated under demanding conditions.
• Thermal‑magnetic trip unit: combines overload protection with fast short‑circuit response for consistent protection performance.
• OEM compatibility: designed to work with Siemens loadcenters and panelboards for straightforward replacements and reliable listings.
• 2‑pole, 240V design: ideal for shared 240V branch circuits in homes, offices, and light commercial spaces.
• 20A rating: provides precise protection for circuits that require a balanced, predictable trip threshold.
• Molded‑case construction: durable, compact housing built for long service in standard electrical panels.
• Versatile applications: suitable for residential, commercial, and light industrial installations where robust protection and easy integration matter.

Technical Specifications

• Manufacturer: Siemens
• Part Number: B220
• 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

• Replacing a failing or aging breaker in Siemens panelboards or loadcenters with a like‑for‑like 2‑pole, 20A, 240V unit to restore proper protection.
• Upgrading a dedicated 240V branch circuit in a residential or light commercial setup where a reliable bolt‑on solution is preferred for jobsite stability.
• Adding a new 240V circuit in a retrofit project, ensuring compatibility with existing Siemens OEM panels for a clean, code‑compliant installation.

Installation and Practical Tips

• Power down the panel and verify that the intended loadcenter supports bolt‑on breakers before installation.
• Install the B220 into a matching Siemens panelboard or loadcenter to ensure proper alignment with the bus and labeling.
• Tighten mounting hardware to the torque specifications specified by Siemens to maintain a secure bus connection and minimize vibration.
• After installation, test any connected circuits to confirm stable protection and check that the trip unit responds predictably under controlled conditions.