Square D HDA36070USYP 70A 3-Pole 600 V Circuit Breaker

Engineered for demanding electrical environments, the Square D HDA36070USYP is a robust 70 A, 3-Pole circuit breaker designed to protect 3-phase feeders and equipment in commercial and industrial panels up to 600 V. This part, clearly identified by HDA36070USYP, delivers reliable overcurrent protection when you need to safeguard high-power circuits.

Key specifications

• Part number: HDA36070USYP
• Current rating: 70 A
• Poles: 3
• Voltage rating: 600 V
• Type: Circuit breaker

Why this matters

The 3-pole design ensures simultaneous disconnection of all live conductors in a three-phase system, enhancing safety and preventing damage to motors, transformers, and feeders. With a 70 A rating, it provides precise protection for medium to high-power loads, helping minimize downtime and costly equipment failures in busy electrical environments.

Ideal uses

• Protects three-phase motors and feeders in commercial or industrial equipment operating up to 70 A in 600 V systems.
• Suitable as a replacement part for compatible Square D panels that accept HDA-series breakers.
• Effective for service entrances and distribution panels where reliable, multi-pole overcurrent protection is required.

Installation and compatibility

Verify that your panel accepts HDA-series breakers and that the labeling confirms compatibility with HDA36070USYP. Installation should be performed by a qualified electrician in accordance with local electrical codes. Ensure the wiring configuration matches a 3-phase service and that the bus stabs align with the panel’s design for proper operation.

Practical tips

• Keep terminals clean and free of debris to ensure secure connections and accurate trip performance.
• Periodically inspect for signs of wear, arcing, or corrosion around the breaker and bus area.
• When storing spare units, keep them in their protective packaging to prevent corrosion before install.