Siemens HGB3B030B - 30 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens HGB3B030B is a robust 3-pole bolt-on molded case circuit breaker engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. With a 30 A rating and a 600 V capacity, it delivers reliable, consistent protection for demanding electrical installations in residential, commercial, and light industrial environments.

• Secure bolt-on mounting: Provides a rigid, vibration-resistant connection to the panel bus, helping maintain consistent electrical contact in settings with equipment vibration or movement.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection by combining a thermal element for overloads with an instantaneous magnetic trip for short circuits, reducing nuisance trips while safeguarding wiring and equipment.
• Three-pole, 600 V capability: Designed for three-phase circuits up to 600 V, making it suitable for modern commercial and light industrial panel configurations.
• 30 A operation: Ideal for protecting branch circuits feeding motors, control panels, and other 3-phase loads without compromising performance.
• OEM compatibility: Specifically designed to be compatible with matching Siemens OEM load centers and panelboards, ensuring proper fit, listed coordination, and straightforward replacement.
• Versatile applications: Appropriate for residential service panels, commercial distribution systems, and light industrial equipment where durable, long-term protection is essential.

Use cases and scenarios where the HGB3B030B shines:

• Upgrading or replacing a failed breaker in Siemens panelboards to restore reliable 3‑phase protection for small commercial spaces.
• Protecting 3‑phase equipment racks and lightly industrial distributions where vibration resistance is valuable.
• Installing a dedicated 3‑pole protection device in service entrances or electrical rooms that require sturdy bolt-on mounting and tight bus connections.

Key specifications at a glance

• Manufacturer: Siemens
• Part Number: HGB3B030B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 30 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Why this design matters in the real world: the bolt-on configuration combined with a thermal-magnetic trip unit delivers a more rigid electrical connection and predictable protection behavior, reducing the risk of loose bus connections and inconsistent trips that can occur in vibration-prone environments. When you choose the HGB3B030B, you’re selecting a solution that pairs Siemens engineering with practical, everyday reliability for panel installations in homes, offices, and light industrial settings.