Square D HDA36100U43XAABCSJ 100A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36100U43XAABCSJ: a robust 100 A circuit breaker built for demanding 3-phase electrical systems up to 600 V. Crafted to protect wiring and connected equipment from overloads and short circuits, this unit delivers dependable overcurrent protection in commercial and light industrial environments.

• Part number: HDA36100U43XAABCSJ
• Current rating: 100 A
• Poles: 3 (three-pole design for 3-phase power)
• Voltage rating: 600 V

Why choose this model? The HDA36100U43XAABCSJ is a precise, purpose-built Square D breaker that aligns with compatible Square D panels and distribution equipment. Its three-pole configuration is ideal for clean, coordinated protection across all phases in a 3-phase system, helping to simplify panel layouts and improve fault response consistency.

Ideal use cases include:

• 3-phase motor feeders in manufacturing lines and equipment rooms
• Large commercial HVAC and processing systems
• Control panels and distribution boards in warehouses and facilities with 600 V service

Practical considerations for installation and maintenance:

• Verify compatibility with your Square D panels and bus structure before replacement or installation
• Ensure the breaker's amperage matches the circuit and that the panel labeling supports a 100 A, 3-pole device
• Install by a qualified electrician following standard safety practices and the panel manufacturer's guidelines
• Maintain proper enclosure clearance and secure mounting to ensure reliable operation and easy service access

Designed for reliability and straightforward integration, the Square D HDA36100U43XAABCSJ helps you consolidate protection across all three phases with a single, clearly identified component. When performance, compatibility, and precise 3-phase protection matter, this 100 A, 3-pole, 600 V circuit breaker is a practical, focused choice for upgrading or maintaining your electrical infrastructure.