Square D HDA36090UDYP 90A 3-Pole 600 V Circuit Breaker Potential Transformer

Square D HDA36090UDYP is a rugged, three-phase protective device engineered for demanding electrical systems. With a 90 A current rating, 3 poles, and a 600 V voltage rating, this circuit breaker is built to protect and manage medium to large distribution circuits in industrial and commercial settings. The HDA36090UDYP model is specifically designed to integrate with systems that utilize a potential transformer, enabling precise metering and relay signaling without sacrificing protection reliability.

Smart protection with integrated sensing

This breaker does more than interrupt current—it supports accurate monitoring and coordination. By accommodating a potential transformer interface, it delivers clean, reliable voltage and current signals to protection relays and metering equipment. That means faster fault detection, better protection coordination across feeders, and improved energy management without adding separate sensing hardware.

Key features and benefits

• Current rating: 90 A for dependable overload protection on mid-size distribution circuits.
• Three-pole design provides simultaneous, balanced interruption across all phases for safe, coordinated trip behavior.
• 600 V rating suitable for a wide range of commercial and industrial installations while maintaining robust insulation and clearance margins.
• Part number: HDA36090UDYP ensures precise compatibility within Square D / Schneider Electric ecosystems and standard enclosures.
• Potential transformer compatibility supports integrated sensing paths for metering and protection relays, reducing wiring complexity and enhancing monitoring capabilities.

Ideal use cases

Perfect for electrical rooms, service panels, and feeder circuits in warehouses, manufacturing facilities, large office buildings, and data centers where reliable protection is essential and where remote monitoring or metering is advantageous. The combination of a solid protective trip with potential transformer compatibility makes it a practical choice for systems seeking compact, integrated protection and measurement.

Practical guidance for deployment

For optimal performance, secure proper termination according to local electrical codes and ensure the device is seated correctly in the panel. Regularly inspect connections and labeling, and pair with compatible protection relays and metering modules to fully leverage the potential transformer interface. This approach simplifies maintenance, enhances fault visibility, and helps align protection strategies with energy management goals.