Siemens HED42B080 - 80 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Siemens HED42B080 is an 80‑amp, 480‑volt, 2‑pole bolt‑on molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short‑circuit protection in panelboards and load centers. Built for consistent performance in demanding environments, it combines a rugged mounting approach with precise protective пrofile to keep electrical systems safe and uptime high.

Why this bolt‑on breaker stands out

• Secure bolt‑on mounting provides a rigid, vibration‑resistant bus connection. This reduces the risk of loose connections in panels subject to vibration or movement, helping maintain consistent protection and minimizing maintenance calls.
• Thermal‑magnetic trip unit delivers stable, repeatable protection by responding to both overload (thermal) and short‑circuit (magnetic) conditions. You get fast, predictable Trips when you need them most, with fewer nuisance alarms.
• 2‑pole design protects both live conductors simultaneously, ensuring a complete disconnect on fault conditions and preventing neutral or shared‑fault issues from compromising protection.
• OEM‑compatible installation engineered to work with matching Siemens OEM load centers and panelboards, helping you maintain a cohesive, reliable electrical system.
• High‑amperage, high‑voltage capability with an 80A rating at 480V, making it suitable for feeder protection and larger branch circuits in commercial and light industrial settings.

Technical snapshot

• Manufacturer: Siemens
• Part Number: HED42B080
• Type: Thermal‑magnetic molded case circuit breaker
• Amperage Rating: 80A
• Voltage Rating: 480V
• Number of Poles: 2
• Mounting Style: Bolt‑on
• Application: Branch circuit overcurrent and short‑circuit protection

Ideal use cases

This breaker is a smart fit for panelboard and load center assemblies in commercial spaces, data/comms rooms, light industrial equipment enclosures, and any scenario where a dependable 80A, 480V, 2‑pole protection device is needed. It’s particularly well-suited for feeders and main branch circuits that must withstand vibration, temperature fluctuations, and the rigors of busy electrical rooms.

How it solves real problems

By combining secure mounting with a durable thermal‑magnetic trip mechanism, the HED42B080 reduces downtime caused by loose connections and inconsistent protection. The 2‑pole design ensures full disconnection of both conductors during faults, enhancing safety and simplifying troubleshooting. Its compatibility with Siemens OEM panels means you can retrofit or expand existing systems with confidence, keeping electrical infrastructure cohesive and compliant.

Practical tips for installation and use

• Verify panelboard compatibility with Siemens HED series breakers before installation to ensure electrical and mechanical fit.
• When replacing an older breaker, inspect the mounting area for signs of wear or corrosion; bolt‑on designs rely on clean, secure mounting for best performance.
• In high‑vibration environments (e.g., equipment rooms with heavy machinery), the bolt‑on mounting provides durability that helps maintain long‑term protection integrity.
• Keep 480V systems within the rated scope of protection; do not exceed the specified voltage and amperage ratings for safe operation.