Square D HDA36070US 70A 3-Pole 600 V Circuit Breaker

Square D HDA36070US is a rugged, 70 A, 3-pole circuit breaker rated up to 600 V, engineered to shield three‑phase electrical systems from overloads and faults. With the exact part number HDA36070US, this device is designed for reliable replacement in compatible Square D panels, ensuring seamless integration into your distribution setup.

Why this 3-pole breaker matters for three‑phase protection

• Three-pole design provides simultaneous interruption across all three phases, reducing the risk of unbalanced loads and minimizing arc energy in fault conditions.
• 70 A current rating is a precise fit for motor circuits, feeders, and distribution lines that operate near the upper limit of safe continuous load without unnecessary nuisance tripping.
• 600 V voltage rating expands compatibility with a broad range of industrial and commercial distribution systems, including higher voltage panelboards and multi‑voltage layouts.
• Designed for use in compatible Square D panels, this breaker helps maintain coordinated protection with the rest of your Square D distribution equipment.

Key specifications at a glance

• Current rating: 70 A
• Poles: 3
• Voltage rating: 600 V
• Part Number: HDA36070US
• Brand: Square D (Schneider Electric)

Ideal applications and practical use cases

• 3‑phase motor circuits in manufacturing lines, conveyor systems, pumps, and compressors up to 70 A
• Industrial equipment distribution in panelboards and switchgear that require reliable three‑phase protection
• Commercial and light‑industrial electrical rooms where a single breaker safeguards multiple phase conductors

What to consider when selecting this breaker

• Ensure panel compatibility with HDA-series breakers to maintain proper interlock, mounting, and electrical performance.
• Confirm your system voltage and load characteristics align with a 600 V rating for safe, reliable operation.
• Use this 70 A, 3‑pole unit for circuits that demand balanced, three‑phase protection to prevent component damage and downtime.

Choosing the Square D HDA36070US means opting for a trusted, purpose‑built solution that aligns with Square D's legacy of dependable electrical protection. It’s the practical choice for safeguarding critical three‑phase loads while maintaining straightforward replacement and compatibility within existing Square D installations.