Square D HDP36100U33X 100A 3-Pole 600 V Circuit Breaker Potential Transformer

Meet the Square D HDP36100U33X, a purpose-built circuit breaker with an integrated potential transformer designed for demanding industrial applications. Rated for 100 A with a 3-pole configuration and a 600 V maximum, this device delivers not only robust arc-fault protection but also precise voltage sensing for reliable monitoring and control in complex power systems.

Why this breaker stands out

• Integrated potential transformer: Streamlines panel wiring by combining protection and voltage sensing in one compact unit, enabling accurate local readings and easier remote monitoring.
• Three-pole design for 3‑phase systems: Ensures synchronized protection across all live conductors, safeguarding equipment and reducing the risk of imbalanced faults.
• 100 Amp current rating: Suited for mid-to-large load centers and feeders where reliable protection and manageable fault-clearing currents matter most.
• 600 V maximum system voltage: Fits standard industrial power distributions, providing a safe and compatible solution for higher-voltage environments.
• Square D reliability: Built to endure challenging duty cycles in panels, switchgear, and control rooms, helping minimize nuisance trips and downtime.

Ideal for whom and where

This device is particularly well-suited for industrial facilities, data centers, and commercial power distribution where precise voltage sensing and robust protection are essential. It’s an excellent choice for panels that require both a protective disconnect and integrated monitoring, helping operators keep a close eye on system health without adding external transformers or additional wiring.

How it solves real-world problems

• Reduces wiring complexity: By housing the potential transformer inside the breaker, it eliminates the need for separate sensing transformers in many installations.
• Improved visibility: Built-in voltage sensing supports accurate metering, fault detection, and protective coordination—crucial for preventative maintenance and quick fault isolation.
• Balanced protection: The 3-pole configuration ensures all three phases are protected consistently, minimizing the chance of phase-to-phase faults causing cascading failures.

Technical snapshot

• Part number: HDP36100U33X
• Current rating: 100 A
• Poles: 3
• Voltage rating: 600 V
• Type: Circuit breaker with integrated potential transformer

Practical tips for installation and usage

To get the most from the HDP36100U33X, verify compatibility with your panel enclosure and three‑phase distribution scheme. Plan for straightforward voltage sensing wired through the integrated transformer to your monitoring system, which can simplify diagnostics and improve reliability of protective trips. Regularly confirm that the breaker’s current rating aligns with the feeder and load characteristics to ensure optimal protection without unnecessary interruptions.

Why choose Square D for this application

Square D brings decades of experience in industrial protection and power management. The HDP36100U33X merges protection with sensing in a single, rugged unit, helping you streamline panel design, improve fault visibility, and maintain safer, more reliable operation across demanding environments.