Square D HJA36125SPYP 125A 3-Pole 600 V Circuit Breaker

The Square D HJA36125SPYP 125A 3-Pole 600 V Circuit Breaker is a dedicated 3-phase protective device designed to safeguard larger electrical feeders and machinery. With a 125-amp rating and three poles, this breaker handles multi‑phase loads up to 600 V, providing reliable interruption during overloads or faults in commercial or light industrial environments. Part number HJA36125SPYP ensures precise ordering and cross‑reference in your Square D inventory.

• Current rating: 125 A
• Poles: 3 (three-pole for 3-phase circuits)
• Voltage rating: up to 600 V
• Brand: Square D
• Part number: HJA36125SPYP

Ideal for protecting mid to large 3‑phase feeders, this breaker is well-suited for protecting motors, compressors, conveyors, and other heavy equipment in commercial facilities, manufacturing lines, or data center support infrastructure. The 3-pole configuration helps ensure balanced protection across all phases, reducing the risk of overheating and unsymmetrical faults that can stress wiring and equipment.

Key use cases and scenarios:

• Feeder protection for 3‑phase motors and equipment in workshops, manufacturing floors, or HVAC systems
• Primary protection point in panelboards where three-phase distribution is required
• Replacement for like‑for‑like 125 A, 3‑pole, 600 V breakers in existing Square D installations

Why choose this Square D model over alternatives? It delivers a precise 125 A protection level for 3‑phase circuits at up to 600 V, matching the needs of mid‑capacity industrial loads while staying within Square D’s trusted legacy for reliability and compatibility with Square D panels and bus systems. When selecting, confirm panel compatibility and ensure a like‑for‑like replacement to maintain system safety and electrical code compliance.