Siemens HGB3B125B Molded Case Circuit Breaker – 125A – 3-Pole / 3-Phase – 600V – 100kA @ 240V – Bolt-On – VL Series HGB

The Siemens HGB3B125B is a 125A, 3-pole, 3-phase molded case circuit breaker from the Siemens VL Series Type HGB. It is designed for compatible panelboard-mounted electrical distribution applications and features thermal-magnetic protection with Long-Time and Instantaneous (LI) trip functions.

The breaker has a 600V rating, a 100kA interrupting rating at 240V, and a high interrupting capacity. It uses a bolt-on connection, includes load-side lug terminals, and is suitable for reverse-feed applications.

Specifications:

• Manufacturer: Siemens
• Product Type: Molded Case Circuit Breaker
• Product Family: VL Series
• Series: VL
• Type: HGB
• Catalog No.: HGB3B125B
• Current Rating: 125A
• Number of Poles: 3-Pole
• Phase: 3-Phase
• Voltage Rating: 600V
• Interrupting Rating: 100kA @ 240V
• Interrupting Capacity: High
• Protection Type: Thermal-Magnetic
• Trip Functions: Long-Time and Instantaneous (LI)
• Trip Type: Complete with LI Trip Functions
• Connection / Mounting: Bolt-On
• Mounting Type: Panelboard Mounting
• Terminal Type: Load-Side Lug Terminals
• Reverse Feed: Suitable for Reverse-Feed Applications
• Application: Electrical Distribution and Overcurrent Protection

Part Numbers & Identification:

• Manufacturer Part Number (MPN): HGB3B125B
• Catalog Number: HGB3B125B
• Model: HGB3B125B
• Product Family: Siemens VL Series Molded Case Circuit Breakers
• Series: VL
• Type: HGB
• Brand: Siemens
• Manufacturer: Siemens
• Product Type: Molded Case Circuit Breaker
• Breaker Configuration: 3-Pole, 125A
• UPC:887621219901

Compatibility:

Designed for use with compatible Siemens VL Series Type HGB panelboards and electrical distribution equipment that accept bolt-on molded case circuit breakers. The HGB3B125B provides 125A, 3-pole, 3-phase protection for compatible 600V applications and features high interrupting capacity with LI Long-Time and Instantaneous trip functions.

The breaker is also suitable for reverse-feed applications and includes load-side lug terminals. Always verify the specific panelboard or electrical equipment model, approved breaker type, system voltage, available fault current, pole configuration, trip requirements, terminal arrangement, and installation requirements before installation.

Certifications:

• VL Series Type HGB
• 125A Rated
• 3-Pole / 3-Phase
• 600V Rated
• 100kA @ 240V Interrupting Rating
• High Interrupting Capacity
• Thermal-Magnetic Protection
• Long-Time and Instantaneous (LI) Trip Functions
• Bolt-On Connection
• Panelboard Mounted
• Load-Side Lug Terminals
• Suitable for Reverse-Feed Applications

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