Siemens LGB3B080B - 80 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siem ens LGB3B080B delivers dependable branch circuit protection in a compact, three-pole package. With an 80A rating and a 600V insulating capability, this bolt-on molded case circuit breaker is built for panelboards and load centers that demand durable, maintenance-friendly overcurrent and short-circuit protection.

Why this 3-Pole Bolt-On Breaker stands out

• Secure bolt-on mounting creates a rigid, vibration‑resistant bus connection that stays aligned through harsh electrical environments, reducing loosening risk over time.
• Thermal-magnetic trip unit provides stable, repeatable protection by sensing both overload (thermal) and short-circuit (magnetic) conditions, helping prevent nuisance trips and ensuring fast response when it matters.
• OEM compatibility is designed to pair seamlessly with matching Siemens OEM load centers and panelboards, minimizing integration issues during upgrades or replacements.
• Broad suitability covers residential, commercial, and light industrial applications, making it a versatile choice for new installations or retrofit projects.

Ideal use cases and scenarios

• Protect subfeed or branch circuits in residential subpanels that require reliable 80A protection in a 3-phase setup.
• Upgrade or replace aging breakers in existing Siemens-compatible panelboards and load centers, ensuring consistent trip characteristics and coordination with other protection devices.
• Applications in light commercial spaces where a robust, three-pole breaker is needed to guard shared loads and reduce risk of cascading faults.

Technical overview

• Manufacturer: Siemens
• Part number: LGB3B080B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 80 A
Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical considerations for installation and operation

• Ensure the panelboard or load center is compatible with the LGB3B family to maintain coordinated protection and proper fitment.
• Follow manufacturer torque specifications for bolt-on mounting to preserve the integrity of the bus connection and trip performance.
• Use in configurations where 3-pole protection is required for balanced three-phase systems, motor loads, or multi-wire branch circuits.

Available through AmpState, the Siemens LGB3B080B combines a robust bolt-on design with a reliable thermal-magnetic protection mechanism. If you need a dependable, OEM-compatible solution for 80 A, 600 V, 3-pole branch circuit protection in panelboards and load centers, this breaker is built to perform when it matters most.