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HMA3175 - 175Amp Circuit Breaker

HMA3175 - 175Amp Circuit Breaker

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HMA3175 - 175Amp Circuit Breaker

The HMA3175 is a 175-amp, 3-pole thermal-magnetic circuit breaker designed for applications that use the HMA breaker configuration. It has an interchangeable trip unit, is rated at 40°C, and includes load-side terminals. For maintenance teams working with existing electrical equipment, those details matter—especially when the goal is to replace a breaker while maintaining the required form, fit, and function. If you're matching an existing HMA breaker, check the part number, amperage, poles, voltage, A.I.C. rating, dimensions, trip-unit configuration, and terminal requirements.

Key Features and Benefits

  • 175 Amp, 3-pole configuration for compatible electrical distribution equipment
  • Thermal magnetic operation provides the protection characteristics specified for this breaker type
  • Interchangeable trip unit as part of the HMA configuration
  • Rated for operation at 40°C
  • Load-side terminals are included
  • Clearly defined dimensions make it easier to check physical fit against an existing breaker
  • Useful for maintenance and replacement applications involving compatible legacy HMA equipment
  • Built to last when installed and used within its specified electrical ratings

Technical Specifications

  • Part Number: HMA3175
  • Type: HMA
  • Breaker Type: Thermal Magnetic
  • Amperage: 175 Amps
  • Poles: 3
  • Temperature Rating: 40°C
  • Trip Unit: Interchangeable
  • A.I.C. @ 600VAC: 25k
  • A.I.C. @ 480VAC: 35k
  • A.I.C. @ 240VAC: 65k
  • Dimensions: 8.25"W x 16.00"L x 4.00"D
  • Width: 8.25 in.
  • Height / Length: 16.00 in.
  • Depth: 4.00 in.
  • Approx. Shipping Weight: 46.00 lbs.
  • Terminals: Load-side terminals included

Material Compliance and Certifications

No specific material compliance information or agency certifications were included in the supplied specifications for the HMA3175. For that reason, UL, CSA, RoHS, or other certifications should not be assumed.

If a particular listing or certification is required for your application, check the markings on the breaker and the requirements of the equipment where it will be installed.

Where It Works Best

The HMA3175 175 Amp circuit breaker is best suited to existing electrical distribution systems designed for an HMA 3-pole thermal-magnetic breaker with this set of ratings and dimensions. That makes it especially useful for maintenance and replacement projects involving compatible legacy equipment.


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.

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