NC150 50A 1P 120V Circuit Breaker, Plug-On, Normally Closed | AmpState

The NC150 is a plug-on, normally closed circuit breaker designed to deliver dependable protection in everyday electrical work. With a compact 1-pole footprint and a 50 A rating at 120 V, it’s a straightforward, drop-in solution for panelboards, load centers, and electrical distribution networks. If you’re stocking for service calls or panel builds, this part delivers the exact fit you need without guesswork.

Overview

Built for reliability and ease of use, the NC150 pairs a simple plug-on mounting style with a predictable normally closed operation. In normal conditions, the circuit remains closed and energized; when an overcurrent or fault occurs, the breaker trips to interrupt power and protect conductors and devices. This specific model emphasizes direct part-number compatibility to minimize downtime when replacing aging or failed breakers in established systems.

Key specifications

• Amperage: 50 A
• Poles: 1 Pole
• Voltage: 120 V
• Mounting: Plug-On
• Operation: Normally Closed
• Part Number: NC150
• Brand: Brand Not Specified

Why this NC150 stands out

What makes the NC150 uniquely valuable is its precise part-number match and plug-on design, which streamline replacement in existing builds. Rather than sifting through generics or mismatched form factors, you get a direct fit for panelboards and load centers that rely on a 1-pole, 50 A, 120 V protection device. This specificity reduces inventory complexity and the risk of incompatible components in critical electrical systems.

Ideal use cases

• Maintenance and service teams stocking spare parts for field-ready repairs in commercial, industrial, and residential panels.
• Panel builders and OEMs sourcing exact part-number matches to preserve original protection schemes during retrofits or expansions.
• Retrofit projects where a reliable, easy-to-install 1P 50A 120V breaker is required to restore circuit protection quickly.
• Emergency replacements in existing installations that demand a straightforward, plug-on solution with known performance characteristics.

Installation and compatibility

The plug-on design is aimed at quick, tool-assisted installation into compatible panelboards and distribution assemblies. This makes on-site changes faster and minimizes downtime during maintenance windows. If you’re unsure about compatibility, AmpState offers direct assistance to confirm fit and ensure the NC150 aligns with your panel’s mounting style and electrical ratings. You can reach out for help matching part numbers or verifying compatibility, and the team will guide you to a confident purchase.

Practical tips and considerations

• Keep an exact spare on hand for proactive maintenance—having the NC150 ready can shorten outage planning and improve repair times.
• Document the part number in your service records to simplify future replacements and avoid mismatches during panel upgrades.
• When replacing, follow standard safety procedures: de-energize equipment, verify absence of voltage, and secure the device in accordance with your panel’s guidelines.

Available from AmpState, the NC150 50A 1P 120V Plug-On Normally Closed circuit breaker offers a precise, reliable solution for circuit protection that you can trust in everyday electrical work. If you need help confirming fit or locating the exact direct match for your panel, message us and we’ll help you verify compatibility and secure the right part quickly.