Square D HGA36070UD 70A 3-Pole 600 V Circuit Breaker

Square D HGA36070UD is a 70 A, 3-pole circuit breaker designed for demanding industrial and commercial electrical systems. Rated up to 600 V, this unit delivers dependable overcurrent protection for three‑phase circuits, safeguarding motors, pumps, and control panels from overloads and short circuits.

This specific part, HGA36070UD, is part of Square D’s trusted HGA line, built to perform in challenging environments. With a 3‑pole configuration, it protects all three live conductors simultaneously, ensuring coordinated protection across three‑phase equipment.

Key specifications at a glance

• Current rating: 70 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HGA36070UD
• Configuration: 3‑pole molded‑case circuit breaker for three‑phase protection

Why this 3‑pole, 600 V breaker is the right choice

- Ideal for medium to large three‑phase panels requiring dependable protection for motors, HVAC equipment, conveyors, and other critical loads.

- The 70 A rating aligns with common motor and feeder sizing, helping prevent nuisance trips while delivering fast fault clearing when needed.

- A 600 V rating offers a robust safety margin for industrial distribution setups and equipment insulation.

Practical use cases

• Protect three‑phase motors on manufacturing lines, such as conveyors, fans, or processing equipment.
• Provide reliable feeder protection in commercial or light industrial panelboards.
• Serve as a main or branch circuit breaker in systems designed around 600 V service with three‑phase power.

Installation and compatibility tips

- Verify that the breaker fits your Square D panel and is compatible with your bus bar configuration. This unit is designed to integrate with Square D panels and MCCB assemblies that support HGA‑series devices.

- Install according to NEC guidelines and Square D installation instructions. Ensure proper enclosure clearance, correct torque on lugs, and appropriate wiring size for 70 A protection.

- Label the breaker in your panel schedule and keep a spare HGA36070UD on hand for quick field replacement to minimize downtime.

What makes the HGA36070UD stand out

Compared with generic substitutes, this Square D breaker is engineered to maintain consistent trip characteristics and reliable operation in industrial environments. The three‑pole design delivers synchronized protection across all phases, reducing the risk of unbalanced loads and equipment damage.