Square D HLL36125SNYP 125A 3-Pole 600 V Circuit Breaker

Square D HLL36125SNYP is a robust, industrial‑grade circuit breaker designed to protect three‑phase electrical systems. With a 125 A rating, a 3‑pole configuration, and a 600 V maximum, this unit delivers reliable overcurrent protection for demanding commercial and light industrial applications. Built by Square D, it combines trusted performance with straightforward compatibility in compatible panels and enclosures.

Designed for efficient, dependable protection, this 125 A, 3‑pole breaker helps ensure power availability while safeguarding motors, feeders, and downstream equipment from overloads and short circuits. The 600 V rating makes it suitable for higher‑voltage distribution environments often found in commercial installations, giving you a single, reliable solution for multi‑phase circuits.

Key specifications

• Current rating: 125 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HLL36125SNYP
• Brand: Square D

Why this model stands out

• Brand‑backed reliability: Part of the Square D family, designed for consistent performance in compatible panels and systems.
• Three‑phase protection: The 3‑pole design simplifies wiring for 3‑phase circuits, reducing installation complexity and improving balance across phases.
• High‑voltage readiness: 600 V rating supports a wide range of commercial and industrial applications where higher distribution voltages are common.
• Durable construction: Built to endure daily switching and steady operation in demanding environments, helping minimize unplanned downtime.

Ideal use cases

This breaker is well suited for protecting feeders and branch circuits in commercial and light industrial panels, including:

• Three‑phase motor feeders and controlled loads
• Power distribution panels in small to mid‑size facilities
• Upgrade replacements in Square D systems to restore reliable circuit protection

Installation & maintenance tips

• Confirm that the panel’s voltage and current requirements align with the 125 A, 600 V specs before installation.
• Follow manufacturer installation instructions to ensure proper seating and secure connections.
• Keep the part number HLL36125SNYP handy for future replacements and service records.