Square D HDA36125UAYP 125A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36125UAYP — a 125A 3-Pole 600 V Circuit Breaker engineered for reliable overcurrent protection in demanding electrical installations. This part, identified by HDA36125UAYP, is built to safeguard three-phase feeders and equipment in commercial and light industrial environments, delivering dependable performance when faults occur.

Why this 125A 3-Pole 600V breaker stands out

• Three-pole design for balanced protection— guards all three phases in a 3‑phase system, helping prevent unbalanced loads and potential equipment damage.
• 125-amp rating— precisely sized to protect feeders and circuits that operate near 125A capacity, reducing nuisance trips while maintaining safety margins.
• 600V maximum system compatibility— suitable for a wide range of commercial and industrial applications that run on higher-voltage three-phase power.
• Trusted Square D construction— part of a long-standing family of circuit breakers designed for durable performance in demanding environments and compatible with Square D panels supporting the HDA series.

Ideal applications and use cases

• Protecting feeders that supply motors, conveyors, and other three-phase loads up to 125A in manufacturing floors or facility rooms.
• Protecting power distribution in commercial spaces with 3-phase power, such as data centers, retail hubs with HVAC systems, and large office complexes.
• Serving as a reliable main or feeder breaker in panels where quick, predictable tripping is essential for safeguarding equipment and personnel.

Key specs at a glance

• Part number: HDA36125UAYP
• Current rating: 125 A
• Pole count: 3
• Voltage rating: 600 V
• Brand: Square D

How to optimize installation and long-term reliability

• Verify panel compatibility with the HDA series and ensure the 600 V system matches your electrical distribution.
• Follow the panel manufacturer’s torque specifications and installation guidelines to ensure secure connections and proper trip performance.
• Use as part of a well-planned protection scheme in systems where three-phase balance and quick fault clearing are critical for uptime and safety.

With the Square D HDA36125UAYP 125A 3-Pole 600 V Circuit Breaker, you’re choosing a proven, three-phase protection solution designed to keep bigger loads safe and systems running smoothly. Ready to upgrade or specify in a project? this 125A, 3-pole, 600V breaker is a precise fit for compatible Square D panels and three-phase distribution scenarios.