Square D HLA36100SDYP 100A 3-Pole 600 V Circuit Breaker

Protect critical electrical circuits with the Square D HLA36100SDYP 100A 3-Pole 600 V Circuit Breaker. This trusted Square D device is designed for three-phase power systems, delivering reliable interruption of fault currents and overloads to safeguard wiring and equipment.

Key specifications

• Part Number: HLA36100SDYP
• Current rating: 100 A
• Poles: 3
• Voltage rating: 600 V

Why this breaker stands out

Unlike generic breakers, this unit is part of Square D's trusted protection family, engineered for compatibility with Square D panels and enclosures. The 3-pole design is ideal for three-phase systems, ensuring synchronized tripping across all hot legs — a critical factor for motor loads, compressors, and other three-phase equipment.

Practical use cases

• Protect three-phase feeders supplying motors, compressors, or large HVAC equipment in commercial or light industrial environments.
• Replace a worn or obsolete breaker in a panel that requires HLA36100SDYP to restore system protection and panel certification.
• Upgrade distribution to support higher voltage distribution networks up to 600 volts while maintaining a 100 amp limit.

Installation and compatibility

Verify that your electrical panel accepts HLA-series breakers and that the circuit this device protects is rated for 600 V. This 100 A, 3-pole unit is designed for straightforward replacement in compatible Square D assemblies, helping you maintain system protection without reconfiguring downstream circuits.

Maintenance and reliability tips

Regularly inspect connections for tightness and corrosion, and test the panel's protective devices during routine maintenance to ensure proper trip operation under fault conditions. When replacing older hardware, carry out a full inspection of lead wires and bus connections to preserve reliability.