Siemens | NJG3B300 | Circuit Breaker | 300A | 3-Pole | 600V | Bolt-On

Engineered by Siemens for demanding industrial power distribution, the NJG3B300 circuit breaker delivers dependable protection for three-phase systems. With a 300A rating, 3 poles, and a 600V maximum, it's built to handle substantial loads while maintaining precise protection. The bolt-on design simplifies installation and field retrofits, making it a practical choice for maintenance, retrofit, and replacement projects where exact specifications matter.

Key specifications at a glance

• Amperage: 300A
• Poles: 3-Pole
• Voltage: 600V
• Mounting: Bolt-On

Why choose the NJG3B300 for your system

• Secure bolt-on mounting provides stable, vibration-resistant installation in rugged environments.
• Precisely matches systems that require a 300A, 3-pole, 600V breaker, reducing guesswork in maintenance or upgrades.
• Part number NJG3B300 serves as the definitive compatibility reference, helping you avoid mismatches during replacement or retrofit.
• Ideal for maintenance, retrofit, and replacements where continuity of protection and quick serviceability matter.

Compatibility note: Confirm fit and ratings against your panel or MCC before ordering; relying on the NJG3B300 part number is the best reference for compatibility.

Use scenarios include updating legacy panel boards to support higher-load three-phase equipment, replacing aging breakers that no longer meet demand, or upgrading to a robust Siemens solution within an existing electrical distribution setup. If your system operates at up to 600V and is configured for three-phase protection, the Siemens NJG3B300 is designed to integrate smoothly, maintain reliability, and support long service life in industrial environments.