Square D HJA36070SNYP 70A 3-Pole 600 V Circuit Breaker Potential Transformer

Meet the Square D HJA36070SNYP, a robust 70A, 3-pole circuit breaker with a 600 V rating that also supports integrated potential transformer functionality. Built by Square D, this part delivers dependable overcurrent protection for demanding electrical systems while enabling precise sensing and metering for advanced protection schemes.

Key specifications

• Current rating: 70 A
• Poles: 3
• Voltage rating: 600 V
• Part number: HJA36070SNYP
• Brand: Square D
• Application: three-phase distribution with integrated potential transformer capability

Why this breaker stands out

• Integrated potential transformer support provides a streamlined path for protective relays and metering equipment, reducing wiring complexity in control panels.
• Three-pole configuration securely protects all phases in 3-phase systems, helping to coordinate trips and minimize equipment damage during faults.
• 600 V downstream rating makes it suitable for a wide range of industrial and commercial electrical applications, from motor feeders to panelboard protection.
• Square D compatibility ensures straightforward replacement in existing Square D installations, with reliable performance within standardized bus and enclosure systems.

Ideal use cases

• Industrial facilities with three-phase motors and feeders requiring coordinated protection and reliable sensing.
• Commercial electrical rooms employing metering and protective relays that benefit from an integrated potential transformer within the breaker assembly.
• Retrofits or new installations where a single, compact solution delivers both circuit protection and sensing capabilities.

Installation and compatibility tips

• Confirm panel and bus compatibility with 3-pole, 70 A devices and 600 V systems before installation.
• Use appropriate torque specifications for termination lugs and ensure secure, clean connections to prevent overheating and arcing.
• Plan wiring routes to leverage the potential transformer interface for relay and metering equipment, reducing signal noise and improving accuracy.
• Store and handle the breaker in a clean environment to preserve internal contacts and protective mechanisms for long-term reliability.