Square D HDA36150U43XAA 150A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36150U43XAA—a high-capacity, three-pole circuit breaker built for demanding 3‑phase power environments. With a 150 A rating and a 600 V maximum voltage, this part delivers robust protection for commercial and industrial electrical systems, helping safeguard wiring, equipment, and uptime from overloads and short circuits.

Key characteristics

• Current rating: 150 A
• Pole configuration: 3-pole for three-phase circuits
• Voltage rating: up to 600 V
• Part number: HDA36150U43XAA
• Brand: Square D

Why this 3-pole design matters

Three-pole protection ensures all phases in a three‑phase system are safeguarded evenly, reducing the risk of unbalanced faults that can damage motors and equipment. This makes the HDA36150U43XAA a reliable choice for panels and distribution systems where consistent, coordinated interruption is essential.

Ideal for

• Industrial facilities with 3‑phase machinery and heavy loads
• Commercial buildings that rely on three-phase power distribution
• Panel upgrades, replacements, or new installations requiring a Square D 150 A, 3‑pole, 600 V breaker

Use scenarios and benefits

• Provides dependable fault interruption in circuits powering large motors and drive systems.
• Fits standard Square D installations designed for this part number, enabling straightforward substitution or upgrade.
• By limiting fault current across all phases, it helps minimize equipment wear and potential downtime from electrical faults.

Installation and maintenance tips

• Always reference manufacturer installation guidelines and ensure your panel supports this specific part number.
• Verify correct trip characteristics and torque compliance per your panel’s specification sheet.
• Inspect and replace in‑line with matching Square D components to maintain electrical system integrity.

Why choose Square D HDA36150U43XAA

This part number offers a precise, proven solution for protecting high‑current, three‑phase circuits at voltages up to 600 V. Choosing a familiar, compatibility-focused unit like the HDA36150U43XAA helps ensure reliable performance, easier maintenance, and consistent availability for replacement needs.