The Schneider Electric Square D 8539SJG3V03 is a NEMA Size 1 combination motor starter designed for robust motor control and protection in industrial environments. This unit integrates a magnetic motor starter with a thermal-magnetic overload relay, providing a single, reliable solution for safeguarding motors against overcurrent conditions and short circuits. It is commonly employed in applications requiring dependable start/stop functionality and comprehensive motor safety.

Technical details

• Series: Square D 8539SJG
• NEMA Size: 1
• Enclosure Type: J (NEMA 1, General Purpose)
• Voltage Rating: 600V AC maximum
• Amperage Rating: 30A maximum
• Control Circuit Voltage: 120V AC (coil voltage)
• Overload Relay Type: Thermal-magnetic, adjustable trip settings
• Short Circuit Protection: Provided by the integrated magnetic contactor
• Number of Poles: 3

Applications & compatibility

This combination starter is suitable for direct-on-line (DOL) starting of three-phase induction motors across various industrial sectors. It is frequently specified for use in machine tool applications, conveyor systems, pump controls, and general manufacturing equipment where reliable motor operation and protection are paramount. The 8539SJG3V03 is designed to be compatible with standard NEMA control system wiring practices.

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 8539SJG3V03 or contact our technical team for cross-reference assistance with compatible Square D motor control components.