Siemens NGB3B080B - 80 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Siemens NGB3B080B is a bolt-on molded case circuit breaker designed to deliver dependable branch-circuit overcurrent and short-circuit protection for panelboards and load centers. With an 80A rating and a 600V insulation rating, this 3-pole unit is built to handle three-phase protection in demanding residential, commercial, and light industrial environments.

Why this bolt-on breaker stands out

• Secure bolt-on mounting provides a rigid, vibration‑resistant bus connection that helps maintain reliable protection even in equipment-heavy or vibration-prone installations.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining overload sensing with magnetic short-circuit response, minimizing nuisance trips while quickly reacting to faults.
• OEM compatibility ensures a seamless fit with Siemens panelboards and load centers, making replacements straightforward and performance dependable.
• Versatile application suited for residential, commercial, and light industrial use, enabling one breaker to cover a range of protection needs.
• 600V rating supports common distribution systems in professional settings, providing a safe and effective protection solution for higher voltage circuits.
• 3-pole design accommodates three-phase circuits, delivering balanced protection across all conductors and simplifying panel planning in multi‑phase environments.

Technical specifications

• Manufacturer: Siemens
• Part Number: NGB3B080B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 80A
• Voltage Rating: 600V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Installing or upgrading protection in Siemens panelboards and load centers, ensuring compatible, reliable operation.
• Protecting three-phase branch circuits in small commercial spaces or light industrial enclosures.
• Replacing aging or undersized breakers in compatible systems to improve safety and fault response.
• Implementing robust protection in environments with equipment vibration where a secure connection matters most.

Practical installation tips

• Confirm that your panel is designed for bolt-on molded case breakers and that the bus arrangement matches Siemens NGB series mounting.
• Power down the system and follow all electrical codes and Siemens installation guidelines for safe handling and alignment.
• Mount and secure the breaker to ensure full bus engagement and stable electrical contact, then verify that all connections remain tight during operation.
• Use this unit as part of a coordinated protection strategy within OEM-enabled load centers to maintain optimal coordination and trip performance.

The Siemens NGB3B080B combines robust mechanical mounting with dependable thermal-magnetic protection, delivering clear advantages for professionals seeking reliable, compatible branch-circuit protection in panelboards and load centers. Add it to your Siemens-compatible enclosure to safeguard three-phase circuits with confidence.