Siemens HED42B100L - 100 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Siemens HED42B100L is a 100 A, 480 V, 2-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection for panelboards and load centers. Built for real-world electrical rooms, it combines rugged mounting with precise protection to keep critical circuits safe and running smoothly.

Why this breaker stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays locked in place even in busy equipment rooms or near heavy machinery, reducing the risk of loose connections over time.
• Thermal-magnetic trip unit delivers stable, repeatable protection for both overloads and short circuits, with fast, predictable trips that help protect wiring and downstream devices.
• OEM-compatible installation designed to pair with matching Siemens load centers and panelboards, ensuring seamless integration, consistent trip characteristics, and easier maintenance.
• Versatile for multiple sectors suitable for residential, commercial, and light industrial applications where reliable 100 A protection at 480 V is required.

Technical snapshot

• Manufacturer: Siemens
• Part Number: HED42B100L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 100 A
• Voltage Rating: 480 V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases

In a commercial or light industrial panel, the Siemens HED42B100L protects 480 V branch circuits feeding critical equipment such as HVAC drives, server room power feeds, or utility/service panels. Its bolt-on design makes retrofits and upgrades straightforward in existing Siemens-based installations, while maintaining reliable protection and clean, vibration-free bus connections.

Who benefits

• Electrical contractors and facility engineers upgrading Siemens panelboards and load centers.
• Maintenance teams that need repeatable, predictable protection with minimal nuisance trips.
• Sites requiring robust, code-compliant 480 V protection for commercial and light industrial environments.

For reliability and compatibility in Siemens-based electrical systems, the HED42B100L from AmpState delivers a purpose-built solution that aligns with your panelboard protection strategy. It’s engineered to protect your circuits where it matters most, visit AmpState for availability and order details.