Square D HGA36100UDYP 100A 3-Pole 600 V Circuit Breaker

The Square D HGA36100UDYP is a dependable 100-amp, 3-pole circuit breaker built for demanding three-phase power systems up to 600 V. Designed to protect feeders, motors, and critical loads in commercial and industrial panels, this unit delivers reliable overcurrent protection with coordinated trip performance you can trust when it matters most.

Key specifications at a glance

• Current rating: 100 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HGA36100UDYP
• Type/family: Square D HGA series circuit breaker (3-pole, common-trip capable)

Why engineers and electricians choose this 3-pole design

• Coordinated three-phase protection: The 3-pole arrangement ensures all phases trip together, reducing the risk of unresolved faults that can damage motors and equipment.
• Heavy-duty motor and distribution protection: With a 100 A rating, it is well-suited for feeders, motor circuits, and distribution panels where reliable current limiting is essential.
• Versatile voltage tolerance: Rated for up to 600 V, it supports a wide range of industrial and commercial power systems without sacrificing safety or performance.
• Direct-fit reliability: Part of the Square D lineup, designed to plug into compatible panels and bus systems for straightforward installation and replacement.

Ideal use cases and scenarios

• Protection for three-phase motors in manufacturing lines, pumps in wastewater or chemical processing, and fans in large HVAC systems.
• Feeders for switchgear, MCCs (motor control centers), and distribution panels where a single device safeguards multiple conductors.
• Retrofit or replacement in existing Square D installations to restore or upgrade overcurrent protection without changing panel hardware.

How this breaker fits into your system

• System compatibility: Suitable for panels and enclosures designed to accept the HGA family and standard Square D mounting configurations. Confirm panel rating and notch compatibility during installation.
• Safety and reliability: The 3-pole common-trip functionality helps ensure a safe, simultaneous disconnect across all live phases in fault conditions, protecting both personnel and equipment.
• Maintenance mindset: Regular inspection of terminal integrity and enclosure cleanliness helps maintain dependable performance and extends service life.

Choosing the right protective device matters, and the Square D HGA36100UDYP delivers clear value for three-phase power systems requiring solid, reliable overcurrent protection at 100 amps and up to 600 volts. If you’re building or upgrading a distribution panel, MCC, or motor-fed circuit, this 3-pole breaker provides a concrete, field-proven solution that aligns with professional electrical standards and practical, real-world use.