Siemens NEB3B020 Circuit Breaker, 20A, 3-Pole, 480V

Meet the Siemens NEB3B020 Circuit Breaker — a robust, ready-to-deploy protection device designed for demanding industrial electrical service, maintenance, and replacement projects. With a 20 amp rating across 3 poles and a 480V operating capability, it safeguards multi-phase equipment and prevents costly downtime in high-demand environments.

Core specifications at a glance

• Manufacturer: Siemens
• Part Number: NEB3B020
• Amperage: 20 A
• Poles: 3
• Voltage: 480V

Why choose the NEB3B020 for your installation?

• Three-pole configuration provides synchronized protection across all phases in a 480V system, ideal for industrial motors, presses, conveyors, and large panel boards.
• 20 A rating strikes a balance between protection and uptime for common 3-phase loads, reducing nuisance trips while guarding wiring and components.
• Designed for rugged industrial environments with reliable trip performance and clear electrical compatibility with Siemens ecosystem and standard industrial panels.
• Quick verification path: verify fit by part number and application requirements to ensure correct mounting, bus compatibility, and interface with your panel design.

Best use cases and scenarios

• New installations in service panels and motor control centers that require compliant 480V protection.
• Maintenance replacements where older protective devices no longer meet safety or reliability standards.
• Industrial environments where minimizing downtime is critical, and consistent three-phase protection is essential.

If you’re unsure about compatibility, we can help. Message us to confirm that NEB3B020 matches your application requirements and fitment needs before you purchase.