SJ6040N2ATP

Overview

The SJ6040N2ATP is a silicon-controlled rectifier (SCR) manufactured by Littelfuse, designed for high-temperature and high-current applications. It features a rated repetitive off-state voltage of 600V and supports an RMS on-state current of 40A. The device operates within a junction temperature range of -40°C to 150°C. Key electrical parameters include a maximum gate trigger voltage of 1.5V and a maximum gate trigger current of 15mA. It utilizes a TO-263-3 surface-mount package.

Feature Summary

• Capable of handling high load currents and occasional overloads in environments with limited cooling capacity due to a 150°C junction temperature rating.
• Sensitive gate design allows triggering with low gate current and voltage, facilitating simplified drive circuitry.
• High critical rate of rise of off-state voltage (dv/dt) provides tolerance against line noise and surges common in commercial AC power lines.

Applications

• Rectifiers for various end-use equipment
• Voltage regulators
• Heating control systems
• Motor speed control circuits

Procurement Notes

Verify the specific suffix 'N2' against the official Littelfuse datasheet to confirm pinout and thermal pad configuration. Ensure the ordering information matches the exact TO-263 variant required for your PCB layout. Cross-reference the manufacturer part number directly with Littelfuse documentation rather than relying solely on distributor descriptions.

Selection Notes

Select this component when designing phase control or rectification circuits requiring 40A RMS current handling at 600V blocking voltage. The 150°C operating temperature makes it suitable for applications where thermal management is constrained. Verify that the sensitive gate characteristics align with your available trigger driver capabilities.

Part Context

This part belongs to the SJxx40x series, Littelfuse's first SCR family rated for 600V, 40Arms, and 150°C junction temperatures. The series was introduced to address thermal runaway risks in devices with limited cooling. It complements other thyristors in the portfolio by offering robust performance in demanding industrial and consumer appliance environments.

Replacement Considerations

Consult the official Littelfuse replacement guide for direct equivalents. Generic thyristors may not match the 150°C rating or sensitive gate specifications. Verify that any substitute maintains the TO-263 footprint and identical electrical ratings for dv/dt and holding current.