Siemens NEB3B110B - 110 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens NEB3B110B is a 110 A, 600 V, 3-pole bolt-on molded case circuit breaker (MCCB) designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for solid performance in commercial, residential, and light industrial electrical environments, this breaker provides robust protection where it matters most.

Key differentiators you’ll notice in real-world use

• Secure bolt-on mounting: A rigid, vibration‑resistant bus connection helps prevent loose contacts in panels that experience movement or vibration, improving long‑term reliability.
• Thermal‑magnetic trip unit: Combines temperature-based overcurrent protection with magnetic short-circuit protection for fast, predictable responses to faults, reducing nuisance trips and equipment damage.
• OEM‑level compatibility: Designed to pair with matching Siemens OEM load centers and panelboards, ensuring consistent performance and fit during upgrades or replacements.
• Three-pole design: Provides balanced protection for three‑phase systems, with a single device handling all conductors in the circuit for streamlined wiring and safer operation.

Technical snapshot

• Manufacturer: Siemens
• Part Number: NEB3B110B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 110 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Upgrading residential or light commercial panels where a reliable 3‑pole protection device is required for 3‑phase or multi‑wire branch circuits.
• Installing in new-build or retrofit projects where a secure, vibration‑resistant connection is important—especially in areas with equipment that generates movement or vibration.
• Replacing legacy breakers in OEM panelboards to maintain compatibility and predictable trip characteristics.

Why choose this Siemens breaker over generic alternatives

Beyond basic protection, the NEB3B110B emphasizes reliability in demanding environments through bolt-on hardware that resists loosening, and a thermal-magnetic trip unit that provides stable, repeatable performance over time. Its design supports clear, coordinated protection for three-phase systems and aligns with Siemens’ OEM panelboards, helping you minimize compatibility concerns during installation or expansion.

Whether you’re safeguarding critical commercial equipment, lighting systems in a small business, or a three‑phase processing line in a light industrial setting, the Siemens NEB3B110B delivers dependable, code‑compliant overcurrent protection with installation simplicity and long‑term durability.