Siemens HED43B110 - 110 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Siemens HED43B110 is a 110 A, 480 V, 3-pole bolt-on molded case circuit breaker designed to deliver reliable branch-circuit protection in panelboards and load centers. Engineered for demanding environments, this unit helps shield your electrical systems from overloads and short circuits with precision and ease.

Why this breaker stands out

• Secure bolt-on mounting ensures a rigid, vibration-resistant bus connection, minimizing connection loosening and enhancing long-term reliability in commercial and light industrial panels.
• Thermal-magnetic trip unit provides stable, repeatable protection by responding to both overloads and high-magnitude fault currents, helping you prevent damage to wiring and equipment.
• OEM-compatible design is intended for use with matching Siemens OEM load centers and panelboards, simplifying replacement and upgrade projects without compromising performance.
• Versatile application suited for residential, commercial, and light industrial settings where robust 3-phase protection is required.

What problems does it solve?

When electrical faults occur, unexpected outages and costly equipment damage can follow. The HED43B110 delivers rapide, predictable disconnection under fault conditions while maintaining stable operation during normal load. Its bolt-on mount reduces field installation hassles, making retrofits and upgrades smoother and more reliable in busy electrical rooms.

Ideal use cases

• Protection for three-phase feeders supplying motors, pumps, conveyors, and HVAC equipment in commercial facilities.
• Upgrades or replacements in existing Siemens panelboards and load centers where a bolt-on, three-pole solution is appropriate.
• New installations in residential-adjacent or light industrial environments needing dependable overcurrent and short-circuit protection at 480 V.

Technical snapshot

• Manufacturer: Siemens
• Part number: HED43B110
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 110 A
• Voltage rating: 480 V
• Poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical installation tips

Plan for a clean bus connection by ensuring the mounting surface is flat and free of debris. When replacing an older breaker, verify the panelboard compatibility with the HED43B110 to maintain proper trip characteristics. Always follow electrical safety protocols and manufacturer instructions during installation and maintenance.

For projects needing reliable 110 A, 480 V, 3-pole protection with durable bolt-on mounting, the Siemens HED43B110 from AmpState offers a precise, field-friendly solution designed to perform in real-world panelboards and load centers.