Federal Pioneer NB3P40 - 40 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Federal Pioneer NB3P40 — a 40A, 240V, 3-pole bolt-on molded case circuit breaker designed to protect your branch circuits with precision. Built for dependable overcurrent and short-circuit protection, it slots into panelboards and loadcenters with ease, making it a durable choice for residential, commercial, and light industrial applications.

Why the NB3P40 stands out

• Secure bolt-on mounting delivers a rigid, vibration-resistant bus connection, keeping your protective circuit solid and reliable even in environments with movement or vibration.
• Thermal-magnetic trip unit provides stable, repeatable protection across a wide range of load conditions, reducing nuisance trips and ensuring consistent performance.
• 3-pole, 240V operation is ideal for three-phase distribution of loads, supporting balanced protection for multiple circuits from a single device.
• Compatible with matching OEM load centers and panelboards ensures seamless integration and straightforward replacement in established systems.
• Bolt-on molded case design combines compact form with robust electrical isolation, simplifying installation and serviceability within panel assemblies.

Practical use cases

• Three-pole protection for three-phase feeders in small commercial or light industrial installations.
• Branch circuit protection within residential or commercial load centers where robust, repeatable trip performance is required.
• Retrofit and replacement scenarios in existing panelboards that require a compatible 40A, 240V, bolt-on solution.
• Any application needing reliable overcurrent and short-circuit protection for distributed electrical circuits in tight spaces.

Specifications at a glance

• Manufacturer: Federal Pioneer
• Part Number: NB3P40
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal for professionals stocking panel upgrades or replacements, the NB3P40 from AmpState delivers a reliable, code-aligned solution that keeps critical circuits protected without sacrificing ease of installation or compatibility. Add it to your panelboard today and experience consistent protection across all your three-phase loads.