Square D HDA36070SL 70A 3-Pole 600 V Circuit Breaker

Meet the Square D HDA36070SL—a rugged 70 A, 3-pole circuit breaker designed for three-phase power up to 600 V. With part number HDA36070SL, this device delivers dependable protection for feeders, motors, and control circuits in industrial and commercial panels where reliable interruption is critical for safety and uptime.

Why this 3-pole 600 V breaker stands out

• Three-pole design for balanced three-phase protection: Keeps your three-phase circuits protected with synchronized tripping, reducing the risk of phase imbalances and equipment damage.
• 70 A current rating: Provides robust protection for mid-size feeders and motor circuits without unnecessary nuisance trips, helping to maintain production continuity.
• 600 V maximum voltage rating: Built to handle higher-voltage distribution networks, making it suitable for industrial environments and equipment protected by higher-than-usual operating voltages.
• Reliable Square D lineage: Part of a long-standing family of protection devices known for durable construction and predictable performance in demanding settings.

Practical applications and use cases

• Protect three-phase feeders feeding motors, pumps, compressors, and MCCs in manufacturing facilities.
• Ideal replacement part in Square D panelboards and electrical control panels requiring a 70 A, 3-pole, 600 V protection device.
• Suitable for HVAC equipment, large conveyors, and other industrial loads that run on three-phase power.

Installation and compatibility tips

Ensure compatibility by verifying that your panel or enclosure is designed to accept HDA-series breakers and that the part number matches HDA36070SL. When replacing an existing device, confirm the bus configuration and wiring gauge align with the 70 A, 3-pole, 600 V rating. Follow all applicable electrical codes and manufacturer guidelines for mounting and wiring to ensure safe, reliable operation.

What you gain with this Square D breaker

Strategic protection that minimizes downtime and protects critical equipment in three-phase systems. The HDA36070SL combines precise tripping in overload situations with solid, long-term performance—helping facilities maintain steady operation while safeguarding personnel and assets.