Siemens HGB3B070B - 70 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens HGB3B070B is a 70A, 600V, 3-pole bolt-on molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for durable performance in real-world electrical environments, this unit emphasizes a secure connection and consistent protection when it matters most.

Why this 3-pole bolt-on breaker stands out

• Secure bolt-on mounting: Provides a rigid, vibration-resistant bus connection that minimizes movement and wear, helping maintain dependable conductivity over time.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection by responding appropriately to both overcurrent and short-circuit conditions, reducing nuisance trips while safeguarding equipment.
• OEM-compatible design: Engineered to pair with matching Siemens OEM load centers and panelboards for seamless integration and reliable operation.
• Robust electrical ratings: 70 A continuous current rating and a 600 V maximum voltage rating, suited for residential, commercial, and light industrial applications.

Practical uses and scenarios

In a residential subpanel, this 3-pole bolt-on MCCB provides unified protection for multi-wire branch circuits, helping prevent overloads that could lead to overheating or fire risk. In commercial settings, it protects key distribution paths for lighting, outlets, and small mechanical systems, while in light industrial environments it supports dependable protection for motors and control circuits that operate at moderate voltages. Its bolt-on design is particularly advantageous in installations where vibration or racking forces are a concern, such as equipment rooms, service panels, or outdoor enclosures with frequent door openings.

What you gain with Siemens HGB3B070B

• Consistent protection performance across temperature and load conditions thanks to the thermal-magnetic trip mechanism.
• Long-term reliability with a solid mechanical connection that resists loosening in demanding environments.
• Compatibility with standard Siemens panelboards and loadcenters, reducing integration guesswork during upgrades or replacements.
• Clear, straightforward electrical protection for branch circuits without needing complex configuration.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: HGB3B070B
• Type: Thermal-magnetic molded case circuit breaker (MCCB)
• Amperage Rating: 70 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Designed for installers who demand reliability, straightforward installation, and compatible performance with Siemens load centers, the HGB3B070B is a practical choice for ensuring safe, uninterrupted power distribution in a variety of settings. When you need robust protection that’s easy to integrate and proven in the field, this bolt-on MCCB delivers.