Square D HDA36125SDYP 125A 3-Pole 600 V Circuit Breaker

Discover the Square D HDA36125SDYP, a purpose-built protection device engineered for demanding three-phase electrical systems. This 125 A, 3-pole circuit breaker is designed to reliably guard your distribution circuits at up to 600 V, making it a trusted choice for industrial and commercial applications where consistent, safe power is non-negotiable.

Key specifications at a glance

• Current rating: 125 A
• Poles: 3 (three-phase protection)
• Voltage rating: 600 V
• Part number: HDA36125SDYP

Why this 3-pole design stands out

• Balanced three-phase protection: By disconnecting all three hot legs simultaneously, it minimizes phase imbalances and reduces the risk of equipment damage during faults.
• Clear replacement compatibility: The HDA36125SDYP designation helps you identify exact replacements quickly, supporting maintenance schedules and spares inventories.
• Industrial-grade suitability: With a 600 V rating, it’s well-suited for higher-voltage distribution within commercial buildings, manufacturing floors, and other three-phase environments.
• Durable, trusted brand: Built under Square D standards, this breaker is designed to withstand the rigors of everyday use in demanding settings.

Ideal use scenarios

• Protecting three-phase feeders and equipment in manufacturing lines, pumps, and compressors.
• Safeguarding motors and transformers in commercial or light-industrial power distribution panels.
• Serving as a replacement part in existing Square D installations that specify a 125 A, 3-pole, 600 V protection device.

Practical guidance for deployment

Install this breaker in compatible Square D panels or enclosures that support a 3-pole, 125 A protection device. Use it to ensure quick, safe isolation of all three phases during maintenance or in response to faults. Always follow local electrical codes and manufacturer guidelines when wiring and servicing distribution systems.