Siemens HGB2B030B - 30 A, 600 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens HGB2B030B—a 30A, 600V, 2-pole bolt-on molded case circuit breaker built to shield your electrical system from overcurrent and short circuits. Designed for dependable performance in panelboards and load centers, this breaker combines robust construction with precise protection you can count on in demanding environments.

• Secure bolt-on mounting: Delivers a rigid, vibration-resistant connection to the bus, helping maintain consistent electrical contact even in panels subjected to movement or thermal cycling.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection by responding accurately to overloads and short circuits, reducing nuisance trips and improving overall system reliability.
• OEM-friendly compatibility: Engineered to integrate seamlessly with matching Siemens OEM load centers and panelboards, enabling straightforward replacements and upgrades without custom fittings.
• Versatile applications: Suitable for residential, commercial, and light industrial installations, from home subpanels to small business electrical rooms and equipment racks.

Technical snapshot

• Manufacturer: Siemens
• Part number: HGB2B030B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 30A
• Voltage rating: 600V
• Number of poles: 2
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Use cases and practical scenarios:

When you're outfitting a new panel or upgrading an existing system, the HGB2B030B provides reliable protection for individual branches. Ideal for home electrical panels, small commercial subpanels, and light industrial distributions where a secure, vibration-resistant connection is critical. It’s a solid choice for circuits that require quick, predictable tripping behavior under fault conditions, helping protect wiring, outlets, and connected loads.

Why choose bolt-on over other mounting styles? The bolt-on design delivers a more solid bus connection in installations prone to movement or vibration, reducing the risk of loose contacts over time. This translates to steadier current interruption during faults and fewer service interruptions due to connection issues.

If you’re building or maintaining reliable electrical infrastructure, the Siemens HGB2B030B offers a precise, durable solution for protecting your branch circuits with clear, repeatable performance—all while integrating smoothly with compatible Siemens panelboards and load centers.