Siemens QJ23B080H - 80 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Siemens QJ23B080H is a rugged 80A, 240V, 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 to withstand the demands of real-world electrical environments, this unit pairs precise protection with a secure, vibration-resistant connection that keeps panel wiring solid over time.

• Secure bolt-on mounting: Provides a rigid, low-resistance bus connection that stays put even in environments with vibration or movement—reducing the risk of loose connections and intermittent trips.
• Thermal-magnetic trip unit: Combines thermal and magnetic sensing for stable, repeatable protection. Prevents nuisance trips on gradual overcurrents while rapidly breaking the circuit during a short-circuit, protecting both conductors and connected equipment.
• OEM-aligned compatibility: Specifically designed to work with matching Siemens load centers and panelboards, ensuring a seamless fit and predictable performance within your existing system.
• Three-pole design for 3-phase systems: Ideal for residential, commercial, and light industrial applications that rely on balanced 3-phase power distribution.
• Residential, commercial, and light industrial readiness: Rated for everyday panelboard protection in a variety of settings, from home electrical upgrades to small business electrical rooms.

Why this matters

In panelboards and load centers, reliable overcurrent protection is essential to prevent wiring damage, insulation degradation, and equipment failure. The QJ23B080H’s bolt-on construction minimizes vibration-induced wear, while the thermal-magnetic trip unit ensures protection is fast and predictable—helping facilities avoid costly downtime and repairs.

Key specifications at a glance

• Manufacturer: Siemens
• Part Number: QJ23B080H
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 80A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

This breaker is a practical choice for engineers and electricians upgrading or specifying protection in Siemens-based electrical infrastructures. Its combination of secure mounting, precise trip performance, and OEM compatibility helps you maintain safe, reliable power distribution across a broad range of applications.