Siemens HB3B040 - 40 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens HB3B040 - 40A, 240V, 3-pole Bolt-on Molded Case Circuit Breaker

Engineered for dependable branch-circuit overcurrent and short-circuit protection in panelboards and loadcenters, the HB3B040 combines robust construction with precise protection. This 3-pole bolt-on breaker is built to stay securely seated—even in vibration-prone environments—while delivering consistent performance across installation environments.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays clamped under normal operation and throughout service life.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding to both overload (thermal) and short-circuit (magnetic) conditions, helping prevent nuisance trips and equipment damage.
• OEM-compatible design with matching Siemens load centers and panelboards simplifies replacements and service, ensuring electrical compatibility and reliable operation.
• Versatile for multiple applications suitable for residential, commercial, and light industrial installations where reliable 40A, 240V protection is needed across multi-pole circuits.

Key specifications

• Manufacturer: Siemens
• Part Number: HB3B040
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40 A
• Voltage Rating: 240 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Who should consider the Siemens HB3B040? electricians and technicians upgrading or expanding panelboards and loadcenters in homes, offices, retail spaces, and light industrial facilities. It’s an ideal choice when you need a reliable, OEM-compatible 3-pole solution that maintains solid electrical contact and predictable protection performance across a range of operating conditions.

Practical tips for use: select this breaker for circuits that require definitive 40A protection in a 240V, multi-pole configuration. Ensure compatibility with your existing Siemens panelboard or loadcenter to maintain system integrity, and leverage the bolt-on mounting to maximize mechanical stability in environments with equipment vibration or movement.