Siemens HGB1B025B - 25 A, 347 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens HGB1B025B — a 25A, 347V, 1-pole bolt-on molded case circuit breaker engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers.

Designed for rugged, vibration-prone environments, this breaker uses secure bolt-on mounting to deliver a rigid, vibration-resistant bus connection that stays put even under equipment chatter. The thermal-magnetic trip unit provides stable, repeatable protection across a wide range of fault currents and temperatures, helping to prevent nuisance trips while ensuring fast response when it matters most.

• Bolt-on mounting for reliability: a solid, vibration-resistant connection to the bus, reducing movement and wear in demanding installations.
• Thermal-magnetic protection: precise trip behavior that adapts to temperature changes and current surges, minimizing downtime.
• OEM panel compatibility: crafted to integrate with matching Siemens OEM load centers and panelboards for seamless replacements and upgrades.
• Versatile applications: ideal for residential, commercial, and light industrial circuits requiring safe, effective branch-circuit protection.

Technical specifications

• Manufacturer: Siemens
• Part number: HGB1B025B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 25 A
• Voltage rating: 347 V
• Number of poles: 1
• Mounting style: Bolt-on
• Applications: Branch circuit overcurrent and short-circuit protection

Smart installation and use cases

Install this breaker in panelboards and load centers that require a robust single-pole solution for 347-volt systems. It’s particularly well suited for retrofit projects where Siemens OEM compatibility ensures a straightforward swap, minimizing downtime and wiring complexity. Typical use cases include lighting and receptacle circuits in light commercial spaces, small machinery feeders in workshops, and residential distribution panels where reliable protection is essential.