BF120 - 20Amp Circuit Breaker

BF120 - 20Amp Circuit Breaker

The Siemens BF120 is a 20 amp, 1-pole GFCI circuit breaker for 120V branch circuits. Part of the Siemens BLF/GFCL series, it provides both thermal-magnetic overcurrent protection and 5 mA ground fault protection in a single breaker. It is designed for your applications where both overcurrent and ground fault protection are needed.

This breaker has a 10 kA interrupting rating and a bolt-on connection for installation in compatible Siemens panelboards. It is commonly used in maintenance and replacement projects where matching the original breaker specifications is important. The built-in test button allows technicians to check operation as part of routine inspections.

Key Features and Benefits

• 20A continuous current rating
• Single-pole design for 120V circuits
• 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 GFCI protection in one device
• Maintains proper form and fit in existing systems
• Simple to test during maintenance
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: BF120
  
• Series: BLF/GFCL
  
• Product Type: GFCI Circuit Breaker
  
• Amperage Rating: 20A
  
• Voltage Rating: 120VAC
  
• Number of Poles: 1
  
• Interrupting Rating: 10 kAIC
  
• Ground Fault Trip Level: 5 mA
  
• Trip Type: Thermal-Magnetic
  
• Connection Type: Bolt-On
  
• Application: Electrical Distribution
  
• Standard: UL 943
  
• Dimensions:
  • Width: 6 in.
  • Height: 1.8 in.
  • Depth: 4 in.
• Weight: 2.205 lb
  

Material Compliance and Certifications

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

Where It Works Best

• The BF120 is used in commercial buildings, schools, healthcare facilities, and maintenance areas where 120V GFCI protection is required. It fits in Siemens panelboards for replacement or service, keeping the original electrical system layout while providing overcurrent and ground fault protection.