Siemens NGG2B050L - 50 A, 600 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet Siemens NGG2B050L — a 50A, 600V, 2-pole bolt-on molded case circuit breaker designed to deliver reliable branch-circuit protection in panelboards and load centers. Built to withstand the rigors of busy electrical rooms, this unit provides precise protection when you need it most and stays securely connected through vibration and routine maintenance.

• Secure bolt-on mounting: a rigid bus connection minimizes movement and loosening, ensuring consistent electrical contact even in commercial environments with vibration.
• Thermal-magnetic trip unit: combines fast short-circuit interruption with reliable overload protection, delivering stable, repeatable protection across a wide range of operating conditions.
• OEM-ready compatibility: designed to pair seamlessly with Siemens OEM panelboards and load centers for straightforward replacements and upgrades.
• Versatile applications: suitable for residential, commercial, and light industrial circuits — from lighting and outlets to feeders and HVAC controls.

The NGG2B050L supports protection for branch circuits at up to 50 amperes and up to 600 volts, making it a solid choice for spaces where space efficiency and reliability matter. Its two-pole design provides simultaneous disconnect and protection for both conductors, simplifying wiring within panelboards.

Why choose this Siemens breaker?

• Precise protection with a thermal-magnetic trip curve that adapts to surges and sustained loads, reducing nuisance trips while preserving equipment life.
• Durable construction tailored for panelboard environments — long-life bus connections and rugged housing resist wear in frequent switching operations.
• Clear path to code-compliant installations in residential, commercial, and light industrial settings due to standardized Siemens design.

Technical at a glance

• Manufacturer: Siemens
• Part Number: NGG2B050L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 50A
• Voltage Rating: 600V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Applications: Branch circuit overcurrent and short-circuit protection

Ideal for electricians and facility managers performing panelboard upgrades or replacements, the NGG2B050L provides a reliable, install-with-confidence solution. When you need a rugged, bolt-on breaker that aligns with Siemens load centers and panelboards, this 50A, 2-pole unit delivers consistent protection and straightforward serviceability.