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

Siemens NGG3B050 is a 50A, 600V, 3-pole molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Its compact design makes the most of available panel space while providing dependable protection where it matters most.

Key advantages you’ll feel in daily electrical distribution

• Compact molded-case design: Maximizes panel space without compromising protection, making it ideal for dense commercial or residential installations.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection by combining thermal sensing for overloads with magnetic trip for instantaneous short circuits.
• 3-pole configuration: Ensures synchronized protection across all phases, reducing the risk of multi-wire faults and providing consistent trip behavior in three-phase systems.
• 50A, 600V rating: Suitable for a wide range of branch circuits in commercial, light industrial, and multi-room electrical layouts.
• OEM compatibility: Engineered to pair seamlessly with matching Siemens OEM loadcenters and panelboards, simplifying installation and coordination.

What this means for your project

Use the NGG3B050 as a robust line-side or branch-circuit protector in panelboards and loadcenters where space is at a premium but protection can't be compromised. Its 3-pole design is particularly beneficial for three-phase applications or circuits with multiple hot legs sharing a neutral, helping prevent nuisance trips and maintaining system reliability.

Technical snapshot

• Manufacturer: Siemens
• Part number: NGG3B050
• Type: Thermal-magnetic molded case circuit breaker
• Amperage: 50 A
• Voltage: 600 V
• Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Installation and best practices

Install the NGG3B050 in compatible Siemens loadcenters or panelboards, ensuring wiring matches the panel’s bus configuration and terminal torque specifications. For lasting performance, verify proper alignment with the protection scheme and avoid mixing with non-compatible devices. The result is predictable trip behavior, streamlined maintenance, and safer electrical distribution in commercial and light industrial environments.

Who benefits most

Ideal for electrical professionals designing or upgrading panelboards in commercial spaces, small industrial facilities, and residential complexes that require compact, reliable three-pole protection for branch circuits and three-phase or multi-wire layouts.