Siemens HGB1B015B - 15 A, 347 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens HGB1B015B — a purpose-built, 15 A, 347 V, 1-pole bolt-on molded case circuit breaker that delivers reliable branch circuit overcurrent and short-circuit protection for panelboards and loadcenters. Sold by AmpState, this device is engineered to safeguard commercial, residential, and light industrial electrical systems with precision and resilience.

Why this breaker stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant connection to the bus, minimizing loosening and ensuring consistent performance in environments with equipment movement or vibration.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining overload (thermal) and short-circuit (magnetic) protection in one compact unit, reducing nuisance trips while staying responsive to faults.
• 1-pole design protects a single branch circuit, offering a compact footprint ideal for dedicated circuits such as lighting, receptacle feeds, or small motor loads.
• 347 V rating aligns with commercial distribution networks, enabling safe integration in systems that operate above typical residential voltages while maintaining robust protection.
• OEM compatibility designed to work with matching Siemens loadcenters and panelboards, ensuring a seamless fit and reliable interoperability within existing Siemens ecosystems.

Ideal use scenarios

• Upgrading or replacing a blown or aging breaker on Siemens panelboards in commercial spaces, offices, or retail environments.
• Installing dedicated circuits in residential settings that require precise 15 A protection on 347 V systems.
• Retrofitting light industrial panels where secure mounting and dependable protection against overcurrent are priorities.

How this breaker solves real problems

By combining a rugged bolt-on mounting with a thermal-magnetic trip mechanism, the HGB1B015B delivers dependable protection while resisting vibration-related connection issues. The result is fewer unwanted trips, clearer fault isolation, and longer-lasting panel performance — crucial for maintaining uptime in busy commercial spaces and ensuring safe operation of critical circuits.

Technical snapshot

• Manufacturer: Siemens
• Part number: HGB1B015B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 15 A
• Voltage rating: 347 V
• Number of poles: 1
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

For professionals building or maintaining Siemens-based electrical systems, the Siemens HGB1B015B delivers targeted protection with a trustworthy, panel-ready form factor. Add this essential component from AmpState to ensure your panelboards and loadcenters meet the exacting demands of today’s residential, commercial, and light industrial applications.