Siemens HGB1B030B - 30 A, 347 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Siemens HGB1B030B is a 30A, 347V, 1-pole bolt-on molded case circuit breaker engineered for dependable branch circuit protection in panelboards and load centers. Built to deliver consistent performance across environments, this unit handles both overload and short-circuit scenarios with precision.

Why this breaker stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, reducing movement that can loosen connections over time and compromise protection.
• Thermal-magnetic trip unit delivers stable thermal overload protection with immediate magnetic response for short circuits, ensuring quick isolation of faults and safeguarding wiring and connected equipment.
• Siemens OEM compatibility is designed to pair seamlessly with matching Siemens panelboards and load centers, simplifying installation, retrofits, and serviceability.
• 1-pole, 30A, 347V configuration is ideal for single-phase branch circuits in residential spaces, light commercial setups, and select industrial controls that require dependable protection without unnecessary footprint.
• Compact molded-case design fits standard enclosures while maintaining reliable trip performance and easy field servicing.

Use cases and scenarios

• Protect lighting circuits and receptacle runs in apartment buildings or small offices where a compact, reliable breaker is essential.
• Feed single-phase loads in retail spaces, mechanical rooms, or clean, climate-controlled environments that demand stable protection and durable mounting.
• Upgrade aging panelboards to restore dependable overcurrent protection with a unit that matches Siemens OEM specifications for straightforward coordination with existing gear.

What you get with the HGB1B030B

• One-pole molded case circuit breaker with bolt-on mounting for robust, vibration-resistant installation
• Thermal-magnetic trip unit for predictable, fast fault isolation
• Compatibility with Siemens load centers and panelboards to ensure coordinated performance
• Clear amperage, voltage, and pole specifications for accurate replacement and upgrade decisions

Technical snapshot

• Manufacturer: Siemens
• Part Number: HGB1B030B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 30A
• Voltage Rating: 347V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Whether you’re replacing a failing breaker, expanding an electrical system, or performing a targeted upgrade in a Siemens-based panel, the HGB1B030B offers precise protection, dependable performance, and installation simplicity that electricians appreciate in residential, commercial, and light industrial projects.