Siemens | NGG3B050 | Circuit Breaker | 50A | 3-Pole | 600V

Engineered by Siemens, the NGG3B050 Circuit Breaker delivers dependable overcurrent protection for three-phase systems. With a 50-amp rating, a 3-pole configuration, and a 600V maximum, it provides precise, reliable protection for maintenance, retrofit, and replacement projects in commercial and industrial panels.

• Amperage: 50A
• Poles: 3-Pole
• Voltage: 600V
• Part number: NGG3B050

Why the Siemens NGG3B050 stands out

Designed to fit Siemens panels and align with the standard NGG3 family form factor, this breaker preserves the intended protection characteristics for three-phase feeders. It’s especially valuable when you need consistent current limitation and reliable trip behavior across all poles in a circuit.

Ideal use cases

• Maintenance and service upgrades for commercial or industrial panels that run three‑phase loads.
• Retrofits where a 50A, 3-pole, 600V protection device is required to replace aging hardware.
• Emergency replacements in spare parts inventories to minimize downtime during panel servicing.

Compatibility and best practices

Always verify fit and ratings before ordering. The NGG3B050 is the most reliable reference for compatibility with Siemens panels that accept this style of breaker. If your system operates at or below 600V and requires protection up to 50A per phase, this unit aligns with the electrical design intent.

Handling and maintenance tips

• Store spare breakers in a clean, dry environment to prevent corrosion on terminals.
• Power down the panel and follow lockout-tagout procedures during installation.
• Document replacements with the exact part number NGG3B050 for future service records.