LGB3B125B | Siemens VL Series 3-Pole 125A 600V Thermal-Magnetic Molded Case Circuit Breaker

Siemens · Circuit Breakers & Protection

Description  The Siemens® LGB3B125B is a VL Series molded case circuit breaker (MCCB) designed for reliable circuit protection in low-voltage distribution systems. This 3-pole, 125-amp, 600-volt breaker features a thermal-magnetic trip unit with long-time and instantaneous protection functions. It is engineered for use in industrial and commercial panelboards where high interrupting capacity and compact performance are essential.     Technical Specifications  Condition New/Never Used Surplus Brand Siemens Category Circuit Protection Devices Part Number LGB3B125B Subcategory Molded Case Circuit Breaker Series VL Series (Type LGB) Poles 3 Phase 3-Phase Rated Current 125 A Rated Voltage 600 VAC Interrupting Capacity 100 kA @ 240V, 65 kA @ 480V Trip Unit Type Thermal-Magnetic (LI – Long-Time and Instantaneous) Mounting Type Bolt-On Connection Type Load-side lug terminals Feed Type Suitable for reverse feed Protection Type Overload and short-circuit protection Approvals / Certifications UL Listed, CSA Certified Enclosure Type Panelboard mounting Dimensions (W × L × H) 2.96 × 2.87 × 4.99 in Manufacturer Siemens Breakers Weight 2.75 lbs     Information About LGB3B125B The LGB3B125B is part of the Siemens VL (LGB type) molded case circuit breaker family, designed to deliver consistent performance in demanding electrical environments. Rated at 125 amps and 600 VAC, it offers high interrupting capacity of up to 100 kA at 240V and 65 kA at 480V, ensuring fast fault clearing and system safety. Its bolt-on connection allows secure installation in panelboards, and the breaker is suitable for reverse-feed applications, offering flexibility in system design. Built with a LI trip unit (long-time and instantaneous) and load-side lug terminals, the LGB3B125B combines durability, protection, and easy integration into Siemens power distribution systems. Key Features: High Interrupting Capacity: Rated up to 100 kA @ 240V and 65 kA @ 480V for robust short-circuit protection. Thermal-Magnetic Trip Unit: Combines long-time and instantaneous trip functions for precise overload protection. Bolt-On Mounting: Secure panelboard installation for reliable power connections. 125A Current Rating: Ideal for medium-capacity circuits in industrial or commercial installations. Reverse-Feed Suitable: Can be installed in applications where line and load positions are reversed. Compact 3-Pole Design: Space-efficient and compatible with standard Siemens panelboards. UL Listed Construction: Meets global safety and performance standards for low-voltage protection. High Durability: Built with rugged molded case housing for long operational life in harsh environments. The LGB3B125B delivers the reliability, safety, and performance demanded in industrial power distribution and control applications.

Brand: Siemens · Category: Circuit Breakers & Protection

Key features

• High Interrupting Capacity: Rated up to 100 kA @ 240V and 65 kA @ 480V for robust short-circuit protection.
• Thermal-Magnetic Trip Unit: Combines long-time and instantaneous trip functions for precise overload protection.
• Bolt-On Mounting: Secure panelboard installation for reliable power connections.
• 125A Current Rating: Ideal for medium-capacity circuits in industrial or commercial installations.
• Reverse-Feed Suitable: Can be installed in applications where line and load positions are reversed.
• Compact 3-Pole Design: Space-efficient and compatible with standard Siemens panelboards.
• UL Listed Construction: Meets global safety and performance standards for low-voltage protection.
• High Durability: Built with rugged molded case housing for long operational life in harsh environments.

Specifications

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