Westinghouse HFB3050 50A 3P 600V F-Frame Mark 75 Breaker

Price: $335.00
  • SKUCM846C
In stock - 5 units available.
- +
Cutler-Hammer Dist Equip HFB3050 Circuit Breaker

Stock photo shown for reference only. You will receive a unit of the listed catalog number in the condition stated above, inspected and tested to ESP Product Standards. Cosmetic appearance may vary.

1-Year Operational Guarantee Every breaker we sell — new, surplus, reconditioned, or used — is guaranteed to operate normally for one year from date of sale. Product Standards
Same-Day Shipping In-stock orders placed before 12pm PST typically ship the same business day, with UPS tracking provided. Shipping details
30-Day Returns Return authorization available within 30 days of receipt. Return policy
Talk to a Real Person Questions about fit, condition, or availability? Call 800-664-4377. Credit terms available for approved accounts.
Found this part for less somewhere else? Surplus and reconditioned prices vary widely with scarcity and condition — tell us what you found and make us an offer. Include the catalog number and we’ll respond same business day: call 800-664-4377 or email us. Every ESP unit is tested and backed by our 1-year operational guarantee — make sure you’re comparing like for like.

Description

Westinghouse HFB3050 Specifications

ManufacturerWestinghouse / Eaton / Cutler-Hammer
Catalog NumberHFB3050
SeriesMARK 75 · AB De-ion
TypeHFB — MARK 75, high interrupting
FrameF Frame
Amperage50 A at 40°C
Voltage600V AC
Poles3-Pole
MountingBolt-On
Trip functionThermal-Magnetic — LI (long-time and instantaneous)
Interrupting rating65 kA @ 240V AC · 35 kA @ 480V AC · 25 kA @ 600V AC · 250V DC capable
TerminalsLoad terminals only; the L variant adds line-side lugs
ApplicationsFits Westinghouse and Eaton Pow-R-Line C panelboards and switchboards
Modern equivalentEaton Series C HFD3050 — electrically interchangeable
Weight6 lb
StandardsUL 489 · CSA
ConditionReconditioned — 1-year operational guarantee

This unit is sold reconditioned, inspected and tested to ESP Product Standards, and guaranteed to operate normally for one year from the date of sale.

HFB3050 and FB3050 carry the same 50-ampere rating in the same F-frame case and mount identically, but the HFB clears 65 kA at 240 volts where the standard FB clears considerably less. They are indistinguishable once the panel cover is on, so where a short-circuit study drove the original selection the catalog number is the specification rather than the amperage.

The Westinghouse F frame is obsolete. Eaton's Series C FD and HFD are the successors and are electrically interchangeable, though they do not drop into an F-frame opening without a retrofit. ESP stocks tested reconditioned FB and HFB units across the pole and amperage range.

More Details

Fifty amperes, three poles, Mark 75 high interrupting. Sixty-five kiloamperes at 240 volts is what separates this from a standard FB3050 - same case, same mounting, very different fault performance.

What is "surplus new"?

Surplus new means the item has never been installed or put into service. It may not arrive in its original packaging, but it has never been used.

What does "reconditioned" mean?

Reconditioned items have been inspected, cleaned, and tested to confirm they operate to the manufacturer's original specifications. Every reconditioned item we sell carries a one-year operational guarantee.

How fast will my order ship?

In-stock orders placed before 12pm PST usually ship the same business day via UPS, with tracking provided.

What if I can't find the item I need?

Call 800-664-4377 — we stock thousands of obsolete and hard-to-find electrical parts that may not yet be listed online.

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