The Schneider Electric Square D YA8KKR44A9SXXXXXXX is a high-capacity molded case circuit breaker designed for robust overcurrent protection in demanding industrial electrical systems. Engineered by Schneider Electric's Square D brand, this breaker is a critical component for ensuring the safety and operational continuity of machinery and power distribution networks.

Technical details

• Series: Square D YA
• Type: Molded Case Circuit Breaker
• Ampere Rating: 4000A
• Voltage Rating: 635V
• Frame Size: K (indicated by 'K' in YA8KKR)
• Configuration: 4-pole (indicated by '4' in YA8KKR)
• Terminal Type: Standard (indicated by 'S' in A9SXXXXXXX)
• Actuation Type: Thermal-Magnetic (typical for this series, verify with datasheet)
• Interrupting Capacity: Verify with manufacturer datasheet for specific rating
• Mounting Type: Fixed (typical for this series, verify with datasheet)

Applications & compatibility

This 4000A, 635V circuit breaker is suitable for main feeders, distribution panels, and large motor protection in heavy industrial environments. It is commonly found in applications such as large manufacturing plants, mining operations, and utility substations where reliable and high-fault current interruption is paramount.

Available from Industrial Automation Co as new, refurbished, or surplus stock, backed by a 2-year warranty with same-day shipping on in-stock items. Request a quote for the Schneider Electric Square D YA8KKR44A9SXXXXXXX or contact our technical team for cross-reference assistance with compatible Square D components.