Siemens NEB3B015B - 15 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens NEB3B015B—a robust, 3-pole bolt-on molded case circuit breaker engineered for reliable branch-circuit protection in panelboards and load centers. With a 15-amp rating and a 600-volt capacity, it’s built to handle the demands of modern commercial and light-industrial electrical systems while maintaining safety and performance.

• Secure bolt-on mounting: A rigid connection to the busbar minimizes vibration-induced movement and ensures a dependable, long-lasting feed to your circuits.
• Thermal-magnetic trip unit: Combines thermal and instantaneous magnetic trip mechanisms to deliver stable, repeatable protection across operating temperatures and fault transients. It reacts quickly to short circuits while reducing nuisance tripping from normal load surges.
• OEM-compatible: Designed to drop into matching Siemens OEM load centers and panelboards, simplifying replacements and upgrades without adapters or aftermarket parts.
• Three-pole design: Specifically intended for 3-phase applications, providing synchronized disconnection of all hot legs—essential for motors, compressors, and other 3-phase equipment.
• Versatile applications: Ideal for residential, commercial, and light industrial panels, from service entrance and feeders to equipment panels in HVAC, manufacturing, and data-center environments.

Technical snapshot

• Manufacturer: Siemens
• Part Number: NEB3B015B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 15 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical use and installation tips

Use this 3-pole breaker to protect 3-phase branch circuits feeding motors, pumps, HVAC equipment, or panelboard feeders. Its bolt-on mounting delivers a rugged, vibration-resistant connection ideal for panels in commercial spaces and mechanical rooms. For installation, ensure the host panelboard is rated for 600V operation and designed for bolt-on molded-case breakers. Always follow the manufacturer's installation guidelines and torque specifications for the mounting hardware to maintain safe, compliant operation.

Who should consider the Siemens NEB3B015B?

Electrical contractors, facilities managers, and qualified technicians who need a dependable, 3-pole protection solution for 15-amp circuits in Siemens-based panel systems. It’s an ideal replacement for worn or failed breakers and a solid upgrade option when expanding 3-phase capacity in residential-adjacent commercial setups and light industrial equipment rooms.