Siemens HED43B100 - 100 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Siemens HED43B100 delivers reliable 100A, 480V protection in a 3-pole bolt-on molded case circuit breaker designed for panelboards and load centers. Built to safeguard branch circuits against overcurrent and short circuits, it’s a trusted choice for demanding electrical enclosures where stability matters.

Key advantages that set the HED43B100 apart:

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, maintaining a dependable electrical path even in environments with movement or vibration.
• Thermal-magnetic trip unit delivers stable, repeatable protection across varying fault currents, minimizing nuisance trips while ensuring fast interruption when faults occur.
• 3-pole design for 3-phase systems optimized for 480V applications, making it ideal for commercial and light industrial power distribution.
• OEM compatibility designed to work with matching Siemens OEM load centers and panelboards for a seamless upgrade or replacement.
• Versatile application suitable for residential, commercial, and light industrial environments where reliable branch circuit protection is critical.

Why this matters for your electrical system

When protecting motor loads, lighting, or other critical equipment, a high-quality protective device like the HED43B100 ensures you get predictable tripping behavior tied to actual fault conditions. The combination of a robust bolt-on mount and a dependable thermal-magnetic trip means fewer unexpected trips and shorter downtime due to protective failures. It’s the smart choice for installers who demand reliability, compatibility, and performance in one package.

Technical at a glance

• Manufacturer: Siemens
• Part Number: HED43B100
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 100A
• Voltage rating: 480V
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

• Protection of 3-phase circuits in commercial panelboards and light industrial distribution systems rated for 480V.
• Replacement or upgrade within Siemens-compatible load centers to maintain consistent protection characteristics.
• Protection for equipment circuits in office buildings, retail spaces, and small manufacturing environments where reliable trip performance matters.

With the Siemens HED43B100, you’re choosing a purpose-built protector that aligns with Siemens panel ecosystems, delivering precise protection, durable mounting, and compatibility across installations that demand dependable 3-phase reliability at 480V.