Siemens NGB2B080B - 80 A, 600 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Siemens NGB2B080B is a rugged 80A, 600V, 2-pole bolt-on molded case circuit breaker designed to safeguard electrical panels, load centers, and branch circuits with precision. Built to stand up to vibration and continual use, this breaker delivers reliable overcurrent and short-circuit protection where it matters most—at the point of connection in your panelboard.

Why the NGB2B080B stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays put in demanding environments—reducing nuisance trips and maintaining continuous protection.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance across a range of fault currents and ambient conditions, so you can trust it to interrupt faults quickly and safely.
• OEM-compatible design is built to pair with matching Siemens OEM load centers and panelboards, ensuring a seamless fit and dependable operation.
• Versatile application suitable for residential, commercial, and light industrial installations, handling branch circuit protection with ease.
• Molded case construction offers durability, compact form, and reliable electrical performance in standard electrical panels.

What problems does it solve?

When electrical faults occur, the NGB2B080B shuts down the affected circuit promptly, preventing damage to wiring, devices, and downstream equipment. Its two-pole design ensures both live conductors disconnect together, enhancing safety and eliminating the risk of backfeed through the neutral path in multi-wire branch circuits. The bolt-on mounting minimizes loosening over time, which translates to fewer service calls and more dependable protection in busy electrical spaces.

Ideal use cases

• Upgrading or replacing aging protection devices in panelboards and load centers.
• New construction layouts where reliable, vibration-resistant protection is required in mechanical rooms, basements, or commercial spaces.
• Panelboard retrofits in residential, small commercial, and light industrial environments where a secure, 2-pole 80A solution is needed.

Installation and compatibility

Designed for bolt-on mounting, the NGB2B080B ensures a sturdy mechanical connection to the panel’s bus bars. It is compatible with Siemens’ matching OEM load centers and panelboards, providing a cohesive protection system that installers and electrical teams can trust. Use it in circuits and feeders where 80A current capacity and 600V maximum voltage are appropriate—and where dependable short-circuit interruption is a priority.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: NGB2B080B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 80A
• Voltage Rating: 600V
• Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection