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HKB3125 - 125Amp Circuit Breaker

  • 125 Amp
  • 18k @ 600VAC; 25k @ 480VAC; 65k @ 240VAC
  • 3 Pole
Circuit BreakersSKU: HKB3125 [NS]

Purchase Options: New Surplus

HKB3125 - 125Amp Circuit Breaker Description

HKB3125 - 125Amp Circuit Breaker

The HKB3125 thermal magnetic circuit breaker is a 3-pole, 125-amp electrical protection device designed for use in compatible HKB electrical systems. It is commonly used in commercial and industrial applications where maintaining your existing electrical setup and matching established equipment specifications are important. Featuring an interchangeable trip-unit design and load-side terminals, the HKB3125 provides a practical solution for replacement and maintenance needs in existing power distribution equipment.

Key Features and Benefits

  • 125 Amp Rating: Designed for electrical systems requiring a 125-amp circuit breaker.
  • 3-Pole Design: Supports compatible three-phase electrical systems requiring coordinated circuit protection.
  • HKB Frame Type: Designed for HKB-style breaker systems where proper form, fit, and function are required.
  • Thermal Magnetic Protection: Uses both thermal and magnetic trip functions for applicable circuit protection needs.
  • Interchangeable Trip Unit: Allows flexibility when working with compatible configurations.
  • Load-Side Terminals Included: Help meet connection requirements for matching electrical equipment.
  • 40°C Rated: Designed for applications operating in a 40°C environment.
  • Maintenance-Focused Design: Helps maintain existing electrical systems without changing the original equipment layout.

Technical Specifications

  • Part Number: HKB3125
  • Type: HKB
  • Style: Thermal Magnetic Circuit Breaker
  • Amperage: 125 A
  • Poles: 3
  • Approximate Shipping Weight: 14.00 lbs.
  • Dimensions: 4.13"W x 10.00"L x 4.13"D
  • Height: 10.0 in.
  • Width: 4.13 in.
  • Depth: 4.13 in.
  • A.I.C. Ratings:
    • 18kA @ 600VAC
    • 25kA @ 480VAC
    • 65kA @ 240VAC
  • Temperature Rating: 40°C
  • Trip Unit: Interchangeable design
  • Connections: Load-side terminals included

Material Compliance and Certifications

The HKB3125 should be installed in accordance with applicable electrical codes and the requirements of the equipment it is used with. Always verify voltage ratings, interrupt ratings, and system compatibility before installation.

Where It Works Best

The HKB3125 is well suited for commercial buildings, industrial facilities, and maintenance environments where HKB-compatible equipment is already in place. It works best when replacing an existing breaker and keeping the original system layout intact is the goal.


Use of Original Equipment Manufacturer (OEM) trademarks, names, and logos is for informational and identification purposes only. This does not imply any affiliation, sponsorship, endorsement, or approval by the original equipment manufacturer. CIRCUIT BREAKER SUPERSTORE® is an independent reseller and is not an authorized distributor, affiliate, or representative of any manufacturer. Manufacturer warranties do not apply unless expressly stated. All trademarks and registered trademarks are the property of their respective owners.

Eaton®, Cutler-Hammer®, Westinghouse®, Challenger®, Bussmann®, Edison®, Edison Fuse®, GTE Sylvania®, Crouse-Hinds®, and Cooper® are registered trademarks of Eaton Corporation plc. Products sold are surplus, used, or refurbished and are NOT supplied by Eaton Corporation plc or its affiliates.

Specifications

  • Width:4.13
  • Height:10.0
  • Depth:4.13
  • Poles:3
  • Amperes:125
  • A.I.C. Rating & Volts:18k @ 600VAC; 25k @ 480VAC; 65k @ 240VAC
  • Type:HKB
  • Approx Dimensions:4.13"W x 10.00"L x 4.13"D
  • Additional Notes:40°C Rated, Thermal Magnetic Circuit Breaker With Interchangeable Trip Unit. This item includes load-side terminals. - discontinued by the Manufacturer

Returns are easy

You may return unused items within 30 days of delivery for a full refund.

FREE ground shipping on breaker orders over $100 and all other items with orders over $500.

Shipping charges are Prepaid and Allowed on UPS Ground orders for all other products on orders over $500.00, again only when shipping within the lower 48 continental United States, provided the product(s) can safely ship UPS Ground.

If the product cannot safely ship via UPS Ground, or is too heavy to ship UPS Ground, then the product will be shipped via freightliner at buyer's expense.

CIRCUIT BREAKER SUPERSTORE® offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

Same Day Shipping

We strive to ship out your items within one business day.

In rare circumstances, CIRCUIT BREAKER SUPERSTORE® may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.

CIRCUIT BREAKER SUPERSTORE® provides a limited 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer).

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