Siemens HGB3B040B - 40 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens HGB3B040B is a 40A, 600V, 3-pole bolt-on molded case circuit breaker designed to protect your panelboards and load centers from overcurrent and short-circuit events. Built for reliable performance in residential, commercial, and light industrial settings, this unit pairs robust construction with precise protection to keep electrical systems safe and up and running.

• Bolt-on mounting for a rigid, vibration-resistant connection — ensures a secure bus-bar interface even in environments with movement or vibrations, reducing the risk of loose connections over time.
• Thermal-magnetic trip unit — delivers stable, repeatable protection by responding appropriately to both gradual overcurrent and sudden short-circuit conditions.
• 3-pole design — ideal for 3-phase circuits, providing coordinated protection across all phases in one compact device.
• Compatibility with OEM equipment — engineered to cooperate with matching Siemens OEM load centers and panelboards for straightforward upgrades and replacements.
• Versatile application — suitable for residential, commercial, and light industrial applications where dependable branch circuit protection is essential.

Technical specifications

• Manufacturer: Siemens
• Part Number: HGB3B040B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 40A
• Voltage rating: 600V
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Use cases and installation notes:

• Ideal for replacing worn or failed breakers in Siemens-compatible panelboards and load centers, maintaining system integrity and safety.
• Suitable for retrofit projects in small commercial spaces or light industrial setups where 3-phase protection is required.
• A practical choice for new installations that demand a durable, bolt-on solution with a clear thermal-magnetic protection profile.

Choosing the Siemens HGB3B040B means selecting a dependable, purpose-built component designed to protect your electrical infrastructure with precise, phase-coordinated performance. Its combination of bolt-on rigidity, stable protection, and OEM compatibility helps you reduce downtime, simplify maintenance, and safeguard both equipment and personnel in demanding environments.