Siemens G3B100 100A 3-Pole 240 V Circuit Breaker

Engineered for robust overcurrent protection, the Siemens G3B100 is a 100 A, 3-pole, 240 V circuit breaker (Part Number G3B100) designed to maintain safe, uninterrupted service in compatible Siemens panels and distribution networks. Built to meet the demands of modern electrical setups, this breaker provides reliable protection for multi-conductor, three-phase circuits and 240-volt feeders.

Key specifications

• Current rating: 100 A
• Poles: 3
• Voltage rating: 240 V
• Part Number: G3B100
• Configuration: 3-pole design for comprehensive phase protection

Why this breaker stands out

What sets the Siemens G3B100 apart is its alignment with Siemens’ G3B family, delivering seamless compatibility with compatible Siemens panels and gear. The 3-pole design ensures coordinated protection across all three conductors in a three-phase system, helping prevent equipment damage and reducing downtime due to electrical faults. With a 240 V rating, it’s well-suited for common industrial and commercial applications that rely on stable, three-phase power distribution.

Ideal applications

• Three-phase motor feeders for compressors, pumps, and conveyors
• 240 V distribution branches in commercial or light-industrial environments
• Main or branch protection in Siemens-compatible electrical panels

Installation and compatibility

Designed to integrate with Siemens panel boards that accept G3B-series breakers, the G3B100 offers straightforward replacement and consistent mounting. When planning a retrofit or new installation, verify panel compatibility with G3B components to ensure optimal fit and reliable protection across all phases.

Practical tips

• Before replacement, confirm that the panel is designed for 3-pole, 240 V protection and supports the G3B family.
• Use proper torque on terminal connections to maintain secure, low-resistance contacts.
• Keep spare G3B100 units on hand for quick swaps to minimize system downtime during maintenance.