HGB3B125B - 125Amp Circuit Breaker
- 125 Amp
- 35k @ 480VAC; 100k @ 240VAC
- 3 Pole
Purchase Options: New In Box
HGB3B125B - 125Amp Circuit Breaker Description
HGB3B125B - 125Amp Circuit Breaker
The HGB3B125B is a 125-amp, 3-pole HGB G-frame circuit breaker built for compatible low-voltage panelboard applications where dependable overload and short-circuit protection are essential. Its compact dimensions—approximately 3 inches wide by 5.4 inches high by 2.8 inches deep—also make physical verification simple when you're matching an existing panelboard installation. For applications calling specifically for an HGB3B125B 125A 3-pole circuit breaker, the combination of HGB frame construction, thermal-magnetic protection, defined interrupting ratings, and Cu/Al conductor compatibility gives you the key specifications needed to evaluate the fit with confidence.
Key Features and Benefits
- 125A current rating: Designed for circuits and compatible panelboard applications requiring a 125-amp breaker.
- 3-pole configuration: Provides simultaneous circuit protection across three poles for suitable three-phase electrical systems.
- Thermal-magnetic trip unit: Combines thermal overload response with magnetic short-circuit protection.
- HGB G-frame design: Built for compatible low-voltage panelboard mounting applications using the HGB frame configuration.
- Load-side lug configuration: Equipped with TC1GG20 load-side lugs only, an important detail when matching an existing installation.
- Copper and aluminum conductor compatibility: Accepts 8 AWG to 1/0 AWG Cu/Al conductors, providing flexibility for approved wiring applications.
Technical Specifications
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Catalog Number / MFN: HGB3B125B
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Product Type: Low-voltage panelboard circuit breaker
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Frame Type: HGB G-Frame
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Amperage: 125A
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Number of Poles: 3
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Trip Unit: Thermal-magnetic
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Interrupting Rating at 600Y/347V: 14 kAIC
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Interrupting Rating at 480Y/277V: 35 kAIC
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Lug Configuration: Load-side lugs only
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Lug Type: TC1GG20
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Wire Range: 8 AWG to 1/0 AWG
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Conductor Compatibility: Copper / Aluminum (Cu/Al)
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Dimensions (W x H x D): 3 x 5.4 x 2.8 in.
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Net Weight: 2.756 lb.
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UPC: 887621219901
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Country of Origin: Mexico
Material Compliance and Certifications
The HGB3B125B circuit breaker is UL Listed, providing an important certification reference when evaluating the breaker for a compatible electrical installation. Environmental documentation associated with this model references WEEE (2012/19/EU) take-back obligations and REACH Article 33 information. RoHS substance-restriction compliance is listed as not available in the supplied technical data, and a SCIP number is not provided.
Where It Works Best
The HGB3B125B 125A 3-pole circuit breaker is best suited to compatible low-voltage panelboards and commercial or industrial electrical distribution systems that specifically require an HGB G-frame breaker with this amperage, pole configuration, trip technology, and interrupting capacity. Its thermal-magnetic trip mechanism makes it appropriate where protection against both sustained overload conditions and short circuits is required.
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Siemens®, I-T-E®, and Murray® are registered trademarks of Siemens AG. Products sold are surplus, used, or refurbished and are NOT supplied by Siemens AG or its affiliates.
Specifications
- Depth:3.06
- Height:5.0
- Width:3.0
- Poles:3
- Amperes:125
- A.I.C. Rating & Volts:35k @ 480VAC; 100k @ 240VAC
- Type:HGB
- Approx Dimensions:3.00"W x 5.00"L x 3.06"D
- Additional Notes:40°C, HACR rated, Molded Case Circuit Breaker, Panelboard Mount. Includes Load-Side Terminals
Returns are easy
You may return unused items within 30 days of delivery for a full refund.
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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).