Siemens LGB1B030B - 30 A, 347 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens LGB1B030B — a 30A, 347V, 1-pole bolt-on molded case circuit breaker crafted to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built to endure the demands of commercial and light industrial environments, this breaker combines rugged mounting with precise protection for peace of mind in every installation.

• Secure bolt-on mounting: a rigid, vibration-resistant bus connection that helps prevent loosening and promotes consistent electrical contact over time.
• Thermal-magnetic trip unit: delivers stable, repeatable protection by reacting to both overload and short-circuit conditions, reducing nuisance trips while safeguarding circuits.
• 1-pole, 30A rating: targeted protection for individual branch circuits that require 30A, balancing safety with performance.
• 347V voltage rating: suited for commercial distribution systems where higher voltage operation improves efficiency and reduces conductor stress on appropriate loads.
• Panel compatibility: designed to fit matching Siemens OEM load centers and panelboards, making retrofits and new installations straightforward.
• Versatile application: ideal for residential, commercial, and light industrial applications that demand reliable overcurrent and short-circuit protection.

What problems does the LGB1B030B solve?

In busy electrical rooms, connections can loosen and unpredictable trips can disrupt operations. The LGB1B030B’s bolt-on design minimizes bus movement, while its thermal-magnetic trip unit delivers predictable response across varying loads and temperatures. The result is safer circuits, fewer downtime events, and equipment protection you can count on.

Ideal use cases

• Upgrading or replacing breakers in Siemens panelboards and load centers that require a 1-pole, 30A solution.
• Protecting individual 347V branch circuits in commercial spaces, lighting rooms, and controlled environments.
• Retrofit projects where a compatible bolt-on MCCB is needed for reliable overcurrent and short-circuit protection.

Technical snapshot

• Manufacturer: Siemens
• Part number: LGB1B030B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 30 A
• Voltage rating: 347 V
• Number of poles: 1
• Mounting style: Bolt-on
• Applications: Branch circuit overcurrent and short-circuit protection