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Siemens BF1B020 GFCI Molded Case Circuit Breaker

  • 20A
  • 1 Pole
  • Bolt-On
Siemens BF1B020
GFCI Molded Case Circuit Breaker
Brand Siemens
SKU BF1B020
Select Item Condition
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  • 20A
  • 1 Pole
  • Bolt-On

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Siemens BF1B020 - 20A GFCI Molded Case Circuit Breaker

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$841.09 No Stock

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Description

Built for commercial and industrial applications, the Siemens BF1B020 delivers reliable overcurrent and personnel protection. This 1-pole, 20A GFCI circuit breaker operates at 120VAC with a 10kAIC rating, ensuring safety in wet or damp locations. It mounts into Siemens P1, P2, and P3 panelboards using a secure bolt-on connection. The unit replaces the legacy BF120A model. Equipped with a thermal-magnetic trip unit, it provides 5mA Class A ground fault detection and is HACR and SWD rated.

Specifications

Key specifications
Brand Siemens
Series BF
Amperage 20A
Poles 1
Mounting Style Bolt-On
Voltage 120VAC
Phase 1
AIC Rating 10kA @ 120VAC
Fit and installation
Terminal Type Lugs
For Use With Siemens P1, P2, P3 Panelboards
Wire Gauge 14-10 AWG (Cu), 12-10 AWG (Al)
Max Wire 10 AWG
Min Wire 14 AWG (Cu), 12 AWG (Al)
Protection and operation
Trip Technology Thermal Magnetic
Trip Function Code LIG
Trip Function Long-Time, Instantaneous, Ground Fault
Trip Adjustability Fixed
Standards and features
Special Classification GFCI
Available Options Padlock Attachment
Accessories Load Side Lugs Included
Standards CSA C22.2 No. 5, UL 489, UL 943, NEMA AB 1
Approval CSA, UL
Temp Rating 40C
Construction Features HACR Rated, SWD Rated, Self-Test

Product FAQs

6 answers
Which panelboards are compatible with the Siemens BF1B020 circuit breaker?

The BF1B020 is a bolt-on circuit breaker designed specifically for installation in Siemens P1, P2, and P3 panelboards.

What level of ground fault protection does the BF1B020 provide?

This breaker features a 5mA Class A ground fault circuit interrupter (GFCI). It is designed to provide personnel protection against electrical shock in wet or damp locations.

Does the BF1B020 replace any older Siemens breakers?

Yes, the BF1B020 serves as the direct replacement for the legacy Siemens BF120A 20A GFCI circuit breaker.

How is the neutral connection established on this GFCI breaker?

The BF1B020 utilizes a pigtail neutral wire. This pigtail must be routed and secured to the neutral bus bar in the panelboard to enable proper ground fault detection.

What wire sizes are accepted by the load lugs on the BF1B020?

The load-side lugs are designed to accept 14 to 10 AWG copper (Cu) conductors or 12 to 10 AWG aluminum (Al) conductors.

Is the Siemens BF1B020 suitable for switching lighting loads or HVAC equipment?

Yes, this breaker is SWD (Switching Duty) rated for switching 120VAC fluorescent lighting circuits. It is also HACR rated for use with heating, air conditioning, and refrigeration equipment.

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Reviews

5.0
Rated 5.0 out of 5 stars
Based on 17 reviews
Total 5 star reviews: 17 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
Rating
Ratings
17 reviews
  • PD
    Paul D.
    Verified Buyer
    Reviewing
    Siemens BF120A - 20A GFCI Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    6/25/26
    Fast ship

    Thanks

  • ES
    Eric S.
    Verified Buyer
    Reviewing
    Siemens BF120A - 20A GFCI Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    3/20/26
    20amp Breaker

    Worked as advertised. I have ordered a few times and pricing is great !!

  • AP
    Alex P.
    Flag of United States
    Reviewing
    Siemens BF230A - 30A GFCI Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    12/12/23
    Works as it should! Order

    Works as it should! Order was received on time. No complaints!

  • SC
    SIMON C.
    Flag of United States
    Reviewing
    Siemens BF230A - 30A GFCI Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    7/29/23
    I am very happy with

    I am very happy with price and service, the delivery was on time, I recommend to everybody, this company is honest.

  • CD
    Catherine D.
    Flag of United States
    Reviewing
    Siemens BF230 - 30A GFCI Molded Case Circuit Breaker
    I recommend this product
    Rated 5 out of 5 stars
    6/3/22
    Service was excellent!

    Service was excellent!