Square D HJA36125UP 125A 3-Pole 600 V Circuit Breaker

The Square D HJA36125UP 125A 3-Pole 600 V Circuit Breaker is engineered to protect 3‑phase power distributions in industrial and commercial facilities. With a 125 amp rating, three poles, and a 600 V maximum, this breaker delivers reliable isolation and overload protection for demanding electrical systems.

Key features and benefits

• 125 amp current rating safeguards feeders and branch circuits from overcurrent, helping prevent overheating and equipment damage.
• Three-pole design ensures simultaneous disconnection of all three conductors, providing balanced protection for 3‑phase loads and enhanced safety during shutdowns.
• 600 V voltage rating suitable for industrial distribution, motor control circuits, and other higher‑voltage applications common in commercial settings.
• Part number HJA36125UP guarantees exact model identification for replacement, service, or retrofits within Square D panels and compatible enclosures.
• Durable, reliable construction designed to perform in demanding environments found in manufacturing, facilities management, and data centers.

Use cases you can count on

• Protect 3‑phase motors, pumps, conveyors, and HVAC equipment in industrial or large commercial installations.
• Shield heavy feeders and branch circuits in panel boards that require robust, high‑amperage protection.
• Replace worn or outdated breakers with a proven Square D solution that fits standard Square D distribution systems.

Why choose this model

• Designed specifically for 3‑phase systems up to 600 V, offering appropriate protection for higher‑voltage commercial and industrial environments.
• Exact compatibility with Square D panels and enclosures, making installation straightforward and maintenance predictable.
• Provides clear, dependable protection metrics at a 125 A threshold, helping engineers and technicians plan safe, compliant electrical layouts.

When selecting a circuit breaker, match the amperage, number of poles, and voltage rating to your system requirements. The HJA36125UP delivers precise 125 A, 3‑pole, 600 V protection in a single, reliable package—an essential component for safeguarding three‑phase power in modern facilities.