Siemens NGB3B050 - 50A, 3-Pole, Circuit Breaker

Siemens NGB3B050 is a rugged 50A, 3-pole circuit breaker designed to deliver reliable overcurrent protection in demanding electrical environments. With a 3-pole configuration, it provides balanced protection for 3-phase systems in panelboards, switchboards, and control panels—essential for safeguarding feeders, motors, and downstream equipment.

• Current rating: 50A
• Poles: 3-Pole
• Breaker type: Circuit Breaker

Why this matters

• Engineered by Siemens to deliver dependable performance in industrial, commercial, and OEM applications. The 3-pole design ensures synchronized protection across all phases, reducing the risk of unbalanced faults and equipment damage.
• Provides safe operation and consistent protection for distribution panels and motor control centers, helping minimize downtime and equipment wear.
• Seamless integration into existing Siemens infrastructure, enabling straightforward upgrades or retrofits in panelboards, switchboards, and MCCs.

Ideal use cases

• Protection for 3-phase feeders in manufacturing lines, pumping stations, and HVAC systems.
• Motor control center feeders requiring 50A protection and reliable startup isolation.
• OEM applications where compact, reliable 3-pole protection is essential in custom switchgear.

When selecting overcurrent protection, alignment with your system’s conductor size, short-circuit current rating, and coordination with upstream devices is essential. The 50A, 3-Pole configuration of the Siemens NGB3B050 provides a straightforward, robust protection option that fits standard Siemens distribution architectures.