Siemens G3B050 50A 3-Pole 240 V Circuit Breaker

Meet the Siemens G3B050 50A 3-Pole 240 V Circuit Breaker — a purpose-built protection device for 3-phase electrical systems. With part number G3B050, this breaker delivers reliable overcurrent protection where it matters most: safeguarding motors, drives, and heavy electrical loads in commercial and light industrial panels.

Designed to interrupt all three hot legs simultaneously, it helps prevent fault conditions from spreading and protects equipment from damage in the event of overloads or short circuits. This 50-amp, 3-pole device is rated for 240 V, making it an ideal fit for 3-phase distribution networks commonly found in shops, small factories, and HVAC installations.

• Three-pole protection ensures synchronized disconnection of all phases, enhancing safety and reducing arc potential during faults.
• 50 A rating provides robust protection for high-current feeders and motor circuits without nuisance tripping on normal startup surges.
• Direct replacement compatibility with Siemens panels designed for G3B-series breakers, simplifying maintenance and inventory management.
• True 240 V operation suitable for 3-phase systems, enabling clean, balanced distribution of power to motors, pumps, and industrial equipment.
• Reliability you can trust from Siemens, a long-standing standard in electrical protection and panel safety.

Practical use cases include motor feeders for conveyors or compressors, HVAC equipment power circuits, and 3-phase lighting or processing lines in small to mid-size facilities. If you’re upgrading an older panel or replacing a worn-out breaker, the G3B050 offers a straightforward, code-compliant solution that keeps critical equipment running with minimal downtime.

Key specifications — Part Number: G3B050; Current rating: 50 A; Poles: 3; Voltage rating: 240 V.