BF120A - 20Amp Circuit Breaker

BF120A - 20Amp Circuit Breaker

The Siemens BF120A is a 20 amp, 1-pole GFCI breaker for 120V circuits. Part of the Siemens BLF2 series, it combines thermal-magnetic overcurrent protection with 5 mA ground fault protection in a single device. It interrupts overloads, short circuits, and ground faults, and works in your compatible Siemens panelboards.

It has a 10 kA interrupting rating and a bolt-on connection for installation in panelboards. The push-to-trip button allows technicians to check breaker operation during routine maintenance. Its compact size preserves panel layout and form.

Key Features and Benefits

• 20A continuous current rating
• Single-pole, 120V design
• GFCI protection with 5 mA trip threshold
• Thermal-magnetic trip for overloads and short circuits
• 10 kA interrupting capacity (10 kAIC)
• Bolt-on mounting for Siemens panelboards
• Combines overcurrent and ground fault protection
• Maintains original panel form and fit
• Push-to-trip for testing
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: BF120A
  
• Series: BLF2
  
• Product Type: GFCI Circuit Breaker
  
• Amperage Rating: 20A
  
• Voltage Rating: 120VAC
  
• Poles: 1
  
• Interrupting Rating: 10 kAIC
  
• Ground Fault Trip Level: 5 mA
  
• Trip Type: Thermal-Magnetic
  
• Mounting Style: Panelboard Bolt-On
  
• Net Weight: 0.243 lb
  

Material Compliance and Certifications

• UL 943 Listed
• Built to Siemens electrical distribution standards
• Suitable for Class A GFCI applications
• Meets applicable electrical codes
  

Where It Works Best

• The BF120A is used in commercial buildings, schools, healthcare facilities, and maintenance areas where 120V GFCI protection is needed. It fits in Siemens panelboards for replacements or maintenance, keeping the original layout while providing circuit and ground fault protection.