Siemens HEB2B040B - 40 A, 600 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Siemens HEB2B040B is a 40 A, 600 V, 2-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. From AmpState, this device is engineered for installations where secure connections and reliable performance matter most.

Secure bolt-on mounting for a vibration-resistant connection

The bolt-on design of the HEB2B040B creates a rigid bus connection that resists loosening under vibration or heavy loads. This translates to fewer maintenance interruptions and more consistent protection across the life of the installation, whether in a compact residential panel or a larger commercial distribution setup.

Thermal-magnetic trip unit for stable, repeatable protection

Its integrated thermal-magnetic trip mechanism provides precise overload and short-circuit protection that adapts to temperature and current conditions. You get predictable, repeatable performance—minimizing nuisance trips while delivering rapid response to dangerous faults when they occur.

OEM-ready compatibility for streamlined retrofits

Designed to work with matching Siemens OEM load centers and panelboards, the HEB2B040B offers a straightforward upgrade path or replacement option. This compatibility helps ensure proper fit, consistent electrical characteristics, and smoother installation in existing Siemens-equipped systems.

Ideal for a range of applications

• Residential panelboards needing robust secondary protection for 240 V circuits
• Commercial electrical rooms and light industrial panels requiring reliable branch circuit protection
• Renovations and retrofit projects where a secure, bolt-on breaker is preferred for long-term stability

Key benefits that matter in the real world

• Reduces downtime with a dependable, vibration-resistant connection that stays secure through temperature cycles and load changes
• Delivers consistent protection with a thermal-magnetic trip that minimizes nuisance trips while responding decisively to overloads and faults
• Fits seamlessly in Siemens-based panelboards and load centers, simplifying stocking, sourcing, and service planning
• 2-pole design supports common 240 V circuits, enabling efficient protection for multi-wire systems

Technical specifications at a glance

• Manufacturer: Siemens
• Part Number: HEB2B040B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40 A
• Voltage Rating: 600 V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

For professionals who demand reliability, compatibility, and clear protection for both routine and demanding electrical environments, the Siemens HEB2B040B delivers a focused, practical solution. Install it in panelboards or load centers that require solid bolt-on mounting, precise thermal-magnetic protection, and OEM-grade compatibility—so you can protect circuits with confidence from the first connection to the final load.