Engineered for commercial and industrial applications, the Eaton HFD2125 is a 2-pole, 125A molded case circuit breaker from the Series C family. This F-Frame breaker features a bolt-on mounting style for integration into Eaton Series C panelboards and switchboards. It is replaced by the PDG22M0125TFFL (requires mounting kit). Rated at 65 kAIC at 480VAC, this HACR-rated and current-limiting device offers high interrupting capacity and reverse feed capabilities.
HACR Rated, Reverse Feed, High Interrupting Capacity, Current Limiting
Product FAQs
8 answers
What type of panelboards are compatible with the HFD2125?
This F-frame molded case circuit breaker is designed for use in Eaton Series C commercial panelboards and switchboards. It is not compatible with standard residential load centers like the BR or CH series.
What is the difference between the HFD2125 and a standard FD2125 breaker?
The 'H' in the HFD prefix indicates a high-interrupting capacity rating. The HFD2125 provides 65kAIC at 480VAC, whereas a standard FD2125 is only rated for 35kAIC at 480VAC.
Can the Eaton HFD2125 replace legacy Westinghouse or Cutler-Hammer models?
Yes. Eaton acquired both the Westinghouse and Cutler-Hammer distribution equipment lines. A modern Eaton HFD2125 is a direct, drop-in replacement for older Westinghouse or Cutler-Hammer breakers with the exact same catalog number.
What wire sizes are supported by the standard lugs on this breaker?
The factory-installed lugs accept wire gauges from 4 AWG up to 4/0 AWG. The terminals are dual-rated for both copper (Cu) and aluminum (Al) conductors.
Are the thermal and magnetic trip settings adjustable on this breaker?
No. This specific breaker utilizes a thermal-magnetic trip unit with fixed thermal and fixed magnetic settings. If you require adjustable trip settings, you will need an F-frame breaker with an electronic trip unit, such as an HFDE model.
Is the HFD2125 rated for direct current (DC) systems?
Yes, this breaker is rated for use in DC applications up to 250VDC, providing an interrupting capacity of 22kAIC at that voltage.
How does the HFD2125 mount into the panelboard?
It features a bolt-on connection type. It secures directly to the bus bars of a Series C panelboard or switchboard chassis using the appropriate mounting hardware kits.
Can I use the HFD2125 in a 3-phase system?
This is a 2-pole breaker, so it is designed for single-phase circuits or for protecting two lines of a 3-phase system. For full 3-phase protection, you would need the 3-pole version, which is the HFD3125.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 21 reviews.
Eaton / Cutler-Hammer HFD3200 - 200A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
8/20/26
Breaker
Breaker shipped out and we received it super quick.
DL
Deanna L.
Verified Buyer
Reviewing
Eaton / Cutler-Hammer HFD3150 - 150A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
8/19/26
Eaton / Cutler-Hammer HFD3150 - 150A 3 Pole Molded Case Circuit Breaker
We needed more breakers ASAP and once again, Michael David came thru like he always does. We are a 24/7/ emergency electrical restoration companyso most of our orders are always needed in a rush and SuperBreakers is always my go to!.
RF
Ron F.
Verified Buyer
Reviewing
Eaton / Cutler-Hammer HFD3045 - 45A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
4/9/26
HFD3045
Perfect breaker & great price/delivery. It's very easy to schedule around SB as their projected delivery times are accurate.
CP
Christopher P.
Verified Buyer
Reviewing
Eaton / Cutler-Hammer HFD3020L - 20A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
2/13/26
Fast and Cost effective
Superbreakers Is always my first palce to look for harder to source breakers for a good price, and fast turnaround.
DS
David S. B. D.
Verified Buyer
Reviewing
Eaton / Cutler-Hammer HFD3060 - 60A 3 Pole Molded Case Circuit Breaker