Siemens | HED43B100L | Circuit Breaker | 100A | 3-Pole | 480V

Siemens HED43B100L is a purpose-built, three-pole circuit breaker engineered for demanding 480V three‑phase systems. With a 100A rating, it delivers trusted overcurrent protection for feeders and main circuits in industrial and commercial environments. Designed for maintenance, retrofit, and replacement projects, this part slides into existing panels when the specifications match exactly.

• Amperage: 100 A
• Poles: 3-Pole
• Voltage: 480V
• Part number: HED43B100L

Why choose a Siemens HED43B100L for your system? It’s built to protect complex 3‑phase loads with dependable performance in real-world industrial settings. The 3‑pole configuration ensures simultaneous disconnection across all phases, safeguarding equipment like motors, compressors, and HVAC systems from overdcurrent events. The result is enhanced reliability, smoother shutdowns during fault conditions, and reduced risk of collateral damage to adjacent equipment.

Key use cases include:

• Replacing worn or failed breakers in 480V, three‑phase panels to restore full protection quickly.
• Retrofit projects where the panel requires a 100A, 3‑pole device with matching specifications for seamless compatibility.
• Maintenance scenarios where exact part references (HED43B100L) ensure a safe, code-consistent installation.

Installation and compatibility notes — before ordering, confirm that your equipment truly requires a 3‑pole, 480V, 100A break and that the form factor aligns with your panel. The part number is the best reference for compatibility, and you should verify fit and ratings against your existing electrical system to avoid mismatches. When installing, follow Siemens’ installation instructions for proper termination and safety practices to ensure reliable operation over the long term.

This breaker is ideal for professionals handling industrial distribution, commercial facilities with 480V service, and retrofit projects where maintaining exact specs matters for safety and compliance. By choosing the Siemens HED43B100L, you’re opting for a trusted, purpose-driven solution designed to protect critical equipment and keep systems running smoothly when it matters most.