Siemens BQ2B080H - 80 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Siemens BQ2B080H delivers dependable branch circuit overcurrent and short-circuit protection in a compact, rugged format. This 80 A, 240 V, 2-pole bolt-on molded case circuit breaker is designed for use in panelboards and loadcenters, providing a reliable line of defense against electrical faults while keeping your electrical system organized and safe.

Why this breaker stands out

• Secure bolt-on mounting — a rigid, vibration-resistant bus connection that stays tight under busy conditions, reducing the risk of loose connections and intermittent trips.
• Thermal-magnetic trip unit — combines precise thermal protection with fast magnetic response for short circuits, delivering stable, repeatable protection performance when it matters most.
• OEM-compatible reliability — specifically designed to be compatible with matching Siemens OEM load centers and panelboards, ensuring proper fit, alignment, and electrical integrity.
• Versatile application — suitable for residential, commercial, and light industrial installations where robust 2-pole protection at 240 V is required.

Technical specifications at a glance

• Manufacturer: Siemens
• Part Number: BQ2B080H
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 80 A
• Voltage Rating: 240 V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases and practical benefits

This breaker is a solid choice for electricians and maintenance teams working on panelboards and loadcenters that require a secure, high-current 2-pole solution. Use it to:

• Replace a failed or aging 2-pole breaker in Siemens or compatible panelboards, restoring safe operation quickly.
• Protect 240 V branch circuits in residential or light commercial setups, such as subpanels feeding workshops, garages, or HVAC equipment.
• Upgrade panel protection in environments with vibration or movement where a bolted connection maintains contact integrity better than other mounting styles.

What problems it solves

• Prevents nuisance trips and connection loosening by combining a secure bolt-on mounting with a reliable thermal-magnetic trip mechanism.
• Ensures consistent protection for high-current circuits in panelboards and loadcenters designed for Siemens OEM components.
• Provides clear, dependable short-circuit protection without needing frequent maintenance or recalibration.

With the Siemens BQ2B080H, you gain a precise, durable, and manufacturer-compatible solution for essential electrical protection. Its bolt-on design, robust trip unit, and compatibility with matching panel components make it a practical, long-lasting choice for professional electrical installations.