The Schneider Electric Square D S33661 is a PowerPact circuit breaker shunt trip designed for remote electrical tripping operations. This accessory is engineered for integration with M, P, and R-frame molded case circuit breakers, providing essential safety and control functionality in diverse electrical distribution systems.

Technical details

• Series: PowerPact
• Compatible Circuit Breaker Frames: M-frame, P-frame, R-frame
• Voltage Rating (AC): 110-130 VAC
• Voltage Rating (DC): 125 VDC
• Function: Shunt trip for remote tripping
• Mounting: Designed for internal installation within compatible Square D circuit breakers
• Operation: Actuates the circuit breaker trip mechanism when energized
• Control Signal: Requires a dedicated control voltage signal for activation

Applications & compatibility

This shunt trip unit is commonly employed in industrial control panels and electrical distribution systems where remote circuit breaker tripping is a critical safety or operational requirement. Applications include emergency stop circuits, remote disconnect functions, and integration into automated shutdown sequences for machinery such as conveyor systems, motor control centers, and process equipment.

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 S33661 or contact our technical team for cross-reference assistance with compatible PowerPact components.