Siemens QJ22B080 - 80 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Siemens QJ22B080 is a robust 2-pole bolt-on molded case circuit breaker engineered to deliver dependable branch circuit overcurrent and short‑circuit protection in panelboards and load centers. With its precise thermal-magnetic trip mechanism and solid mounting design, this breaker keeps your electrical system safer and more reliable in daily use.

Why the Siemens QJ22B080 stands out

• Secure bolt-on mounting provides a rigid, vibration‑resistant bus connection, reducing micro-arcing and movement that can loosen over time.
• Thermal-magnetic trip unit delivers stable, repeatable protection by accurately sensing overloads and short circuits, even as ambient conditions change.
• OEM-compatible design is built to work seamlessly with matching Siemens load centers and panelboards, ensuring plug‑and‑play compatibility and reliable performance.
• Versatile application fit ideal for residential, commercial, and light industrial environments where durable, fast-acting protection matters.
• Hardened molded case construction for long service life in demanding electrical panels.

Technical specs at a glance

• Manufacturer: Siemens
• Part Number: QJ22B080
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 80 A
• Voltage Rating: 240 V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Primary Application: Branch circuit overcurrent and short-circuit protection

Use cases and practical benefits

Protecting electrical distribution in panelboards and load centers, the QJ22B080 shines in both new installations and panel upgrades. It’s well-suited for two‑pole circuits that feed essential equipment and large residential/apartment loads, as well as light commercial subpanels where 80 A protection is required across shared feeders. The bolt-on design simplifies replacement in compatible Siemens panels, helping you achieve a secure, code‑compliant installation with fewer fitment issues.

In environments where equipment vibration is a concern—such as commercial or multi‑story residential settings—the rigid bus connection minimizes movement-induced wear. The thermal-magnetic trip provides reliable protection against both sustained overloads and sudden short circuits, reducing the risk of electrical damage and downtime.

Why choose this over generic breakers?

Unlike generic options, the Siemens QJ22B080 is specifically engineered to pair with Siemens OEM load centers and panelboards, ensuring exact fit and optimized trip characteristics. Its combination of bolt-on rigidity, precise thermal-magnetic protection, and panel‑friendly design translates to fewer compatibility headaches and more consistent performance across installations.

Whether you’re building a new panel, upgrading an existing system, or stocking a replacement part for a Siemens‑equipped project, the QJ22B080 delivers clear, tangible advantages: reliable protection, durable mounting, and straightforward integration with your Siemens infrastructure.