Siemens HEB3B040B - 40 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens HEB3B040B is a 40A, 600V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for steady performance in residential, commercial, and light industrial environments, it’s a reliable choice for ongoing electrical safety and system reliability.

• Bolt-on mounting for a rigid, vibration-resistant bus connection — secure, durable installation that helps prevent loose connections in environments with movement or vibration.
• Thermal-magnetic trip unit — combines a fast magnetic short-circuit response with stable thermal overload protection for consistent, repeatable protection characteristics.
• OEM-compatible design — engineered to perfectly align with matching Siemens OEM load centers and panelboards for smooth integration and dependable operation.
• 3-pole configuration — ideal for 3-phase circuits, delivering balanced protection across all phases in commercial or light-industrial applications.

This 3-pole, 40A, 600V breaker protects against overcurrent and short circuits across branch circuits, helping minimize downtime and equipment risk. Its molded-case construction provides reliable performance in a compact, serviceable package designed for easy replacement in existing Siemens systems.

• Siemens
• Part Number: HEB3B040B
• 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

Who should consider this breaker? electricians and specifiers upgrading or expanding Siemens panelboards and load centers, installers refreshing preserved Siemens equipment, and maintenance teams seeking dependable, easy-to-replace protection for 3-phase feeders in light industrial or commercial spaces.

Practical tips for use: pair this breaker with compatible Siemens panel infrastructure to ensure optimal fit and performance, and follow standard electrical safety practices during installation. If you’re replacing an existing unit, verify that your panel’s model and the HEB series compatibility match to maintain intended protection characteristics and warranty considerations.