Siemens NEB1B020B - 20 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Siemens NEB1B020B is a 20A, 277V, 1-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for reliability, it integrates seamlessly into professional electrical deployments where performance and durability matter.

• Bolt-on mounting provides a secure, vibration-resistant bus connection for a stable, long-lasting installation.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding to both overloads and short circuits with predictable trip behavior.
• OEM-compatible design is engineered to fit and coordinate with matching Siemens panelboards and load centers for straightforward installation and consistent protection.
• Versatile across applications suitable for residential, commercial, and light industrial environments where 277V circuits are common.

Why this matters in real-world setups:

• In a home workshop or basement panel, the 20A rating protects wiring and devices on a dedicated circuit without unnecessary nuisance trips.
• In commercial lighting or equipment circuits operating at 277V, the breaker’s thermal-magnetic action provides fast, reliable disconnection during faults, helping prevent equipment damage and fire risks.
• In compact electrical rooms or service areas, the bolt-on design maintains a solid connection even in spaces with vibration or movement, reducing maintenance concerns over time.

Technical specifications

• Manufacturer: Siemens
• Part Number: NEB1B020B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 277V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Designed for reliability and ease of use, the Siemens NEB1B020B is a solid choice for electricians and facilities managers seeking a durable, accurately rated breaker that matches Siemens’ panelboard ecosystems and delivers clear protection where it’s needed most.