BF120AH - 20Amp Circuit Breaker

BF120AH - 20Amp Circuit Breaker

The Siemens BF120AH is a 20 amp, 1-pole GFCI circuit breaker for your 120V branch circuits. Part of the Siemens BLHF2 series, it combines thermal-magnetic overcurrent protection and 5 mA ground fault protection in a single breaker. It is intended for applications where both your circuit protection and GFCI protection are required.

With a 22 kA interrupting rating, the BF120AH is used in electrical systems with higher available fault current than standard 10 kAIC breakers. The breaker mounts in compatible Siemens panelboards and helps maintain the original electrical specifications of the installation. A built-in push-to-trip button allows breaker operation to be checked during inspections and routine maintenance.

Key Features and Benefits

• 20A current rating
• Single-pole design
• 120VAC operation
• 5 mA GFCI protection
• Thermal-magnetic trip mechanism
• Protection against overloads, short circuits, and ground faults
• 22 kA interrupting capacity (22 kAIC)
• Panelboard mounting configuration
• Compatible with designated Siemens panelboard applications
• Push-to-trip button for testing
  

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: BF120AH
  
• Series: BLHF2
  
• Product Type: GFCI Circuit Breaker
  
• Amperage Rating: 20A
  
• Voltage Rating: 120VAC
  
• Poles: 1
  
• Interrupting Rating: 22 kAIC
  
• Ground Fault Trip Level: 5 mA
  
• Trip Type: Thermal-Magnetic
  
• Mounting Style: Panelboard Mounting
  
• Application: Circuit Protection
  
• Net Weight: 0.243 lb
  

Material Compliance and Certifications

• UL 943 Listed
• Manufactured to Siemens electrical distribution specifications
• Intended for Class A GFCI applications
• Suitable for installation in accordance with applicable electrical codes
  

Where It Works Best

• The Siemens BF120AH is commonly found in commercial buildings, schools, healthcare facilities, retail spaces, and maintenance areas where GFCI protection is required on 120V circuits. It is often installed in compatible Siemens panelboards during maintenance and replacement projects where matching the existing breaker rating and interrupting capacity is important. This breaker is a common choice when a 20A, 1-pole GFCI breaker with a 22 kAIC rating is required for an existing electrical system.