Siemens NGG3B015L - 15 A, 600 V, 3-Pole Circuit Breaker | AmpState

Introducing the Siemens NGG3B015L — a compact, reliable 3-pole molded case circuit breaker rated for 15A at up to 600V. Designed to protect branch circuits in panelboards and load centers, it delivers dependable overcurrent and short-circuit protection while conserving valuable panel space.

Key benefits

• Space-efficient design: The compact molded case footprint lets you maximize panel real estate without sacrificing protection.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection by combining precise thermal sensing with fast magnetic interruption during faults.
• OEM-ready compatibility: Engineered to pair with matching Siemens OEM load centers and panelboards for consistent performance and straightforward replacement.
• Versatile for multiple sectors: Ideal for residential, commercial, and light industrial applications where reliable protection is essential.

Technical snapshot

• Manufacturer: Siemens
• Part Number: NGG3B015L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 15 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases

In a residential subpanel, the NGG3B015L protects multiple circuits from overloads and short faults, reducing nuisance trips while ensuring rapid interruption when faults occur. In commercial spaces, it safeguards lighting and small-motor circuits along a three-phase distribution path, helping maintain service continuity by isolating faults quickly. For light industrial panels, it provides a dependable protection layer for machinery feeders without crowding the panel or complicating wiring layouts.

Installation and care tips

• Install in panelboards or load centers designed to accept 3-pole molded case breakers of this rating and configuration.
• Ensure the panel is rated for 600V and 15A to match the device specifications.
• When upgrading or replacing, use the same type and rating to preserve electrical system coordination and trip characteristics.
• Follow local electrical codes and consult a licensed electrician for installation or servicing tasks.

Why choose this Siemens breaker

The NGG3B015L embodies Siemens' commitment to dependable electrical protection. Its compact form factor frees panel space, while the thermal-magnetic trip mechanism provides reliable, predictable interruption for both overloads and short circuits. When paired with Siemens OEM load centers, it delivers cohesive performance, simplifies maintenance, and ensures consistent protection across your electrical system.