Siemens BF120A | 20A 1-Pole Type BLF GFCI Bolt-On Circuit Breaker

Main Description:

The Siemens BF120A is a 20-amp, 1-pole molded case circuit breaker designed for dependable overcurrent and GFCI protection in residential, commercial, and light-industrial systems. Part of the BL Series and designated as a Type BLF breaker, it features a bolt-on mounting design and provides 5mA ground-fault protection. Rated for 120 VAC operation with a 10 kA interrupting capacity, the BF120A incorporates thermal-magnetic trip technology with Long-Time and Instantaneous protection functions, ensuring precise and reliable circuit interruption. Its durable molded-case construction supports long-term performance across a wide range of applications.

Technical Overview:

• Manufacturer: Siemens

• Brand: Siemens

• Part Number: BF120A

• Category: Circuit Breaker

• Subcategory: Molded Case Circuit Breaker – 20 Amp

• Condition: New/Never Used Surplus

• Series / Type: BL Series / Type BLF

• Poles: 1

• Phase: Single-Phase

• Amperage Rating: 20 Amps

• Voltage Rating: 120 VAC

• Frequency: 50/60 Hz

• Interrupting Capacity: 10 kA

• Trip Type: Thermal Magnetic (LI – Long-Time / Instantaneous)

• Additional Protection: GFCI – 5 mA Fault Protection

• Mounting Type: Bolt-On

• Application: Residential, Commercial, and General-Purpose Panels

• Construction: Molded Case

Key Features:

• 20A Type BLF breaker with integrated 5mA GFCI protection

• Thermal-magnetic LI trip functions for accurate overload and short-circuit response

• Bolt-on mounting for secure installation

• Rated 10 kA at 120 VAC for standard fault protection

• Single-pole design suitable for 120-volt single-phase circuits