Square D HDA36125UK 125A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36125UK 125A 3-Pole 600 V Circuit Breaker — a purpose-built protective device designed for demanding 3‑phase electrical applications. This unit, identified by part number HDA36125UK, delivers reliable overcurrent protection for systems up to 600 V with a robust 125 A current rating.

Why this 3-Pole breaker stands out

• 125 A current rating for substantial loads while maintaining dependable protection.
• 3-pole configuration ideal for balanced 3-phase circuits common in industrial and commercial environments.
• 600 V voltage rating suitable for higher voltage distribution networks, offering versatility across installations.
• Constructed by Square D, a trusted name in electrical protection and panel compatibility, ensuring reliable fit and performance in compatible panels and distribution boards.

Ideal applications and use cases

• New or upgraded 3-phase electrical panels in manufacturing facilities, warehouses, and large workshop environments.
• Replacement parts in maintenance programs where a durable, standardized 3-pole, 600 V breaker is required.
• Industrial control panels and distribution systems that operate close to the upper limits of moderate-to-high load demands.

What problems it helps prevent

By providing targeted protection for 3-phase circuits, the HDA36125UK helps guard equipment from overload conditions that can lead to damage, downtime, and safety risks. Its 3‑pole design ensures simultaneous protection across all three phases, promoting system balance and reducing uneven current exposure in multi-phase networks.

Practical guidance for integration

• Verify compatibility with your Square D panels and busbar configuration to ensure a proper fit and reliable operation.
• Keep the HDA36125UK part number on hand for accurate ordering and quick part identification during maintenance or upgrades.
• Use as a strategic component in preventive maintenance to minimize unexpected outages on critical 3-phase circuits.

Technical snapshot

• Part Number: HDA36125UK
• Current rating: 125 A
• Poles: 3
• Voltage rating: 600 V