SJ6020R2ATP

Overview

The Littelfuse SJ6020R2ATP is a high junction temperature Silicon Controlled Rectifier (SCR) from the SJxx20xxA series, rated for 600 V repetitive blocking voltage and 20 A RMS on-state current. It utilizes a TO-220R non-isolated mounting tab package with a center lead gate configuration. The device features a maximum gate trigger current of 10 mA at approximately 1.5 V. It supports an operating junction temperature range of -40°C to +150°C and is qualified under AEC-Q101 standards. Key electrical parameters include a maximum forward voltage of 1.6 V at 40 A, a holding current of 75 mA, and a peak non-repetitive surge current capability of 300 A at 60 Hz.

Feature Summary

• High thermal endurance with a maximum junction temperature rating of 150°C
• Automotive-grade reliability through AEC-Q101 qualification
• Low gate sensitivity requiring a maximum trigger current of 10 mA
• Robust surge handling capability up to 300 A

Applications

• AC generator rectifiers
• Battery voltage regulators
• Inrush current controllers in AC to DC applications
• Power tool controls
• Home appliance motor speed controls

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm the exact package type and packing mode. The 'R' designation indicates a non-isolated TO-220 mounting tab, while 'TP' specifies tube packaging. Confirm that the required gate sensitivity matches the '2' code for 10 mA maximum trigger current before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring high thermal stability and automotive-level reliability. Ensure the application voltage does not exceed the 600 V rating and consider derating continuous current to 75% of the 20 A rating for extended life. Verify that the gate drive circuit can supply sufficient current to meet the 10 mA maximum trigger requirement under worst-case temperature conditions.

Part Context

This part belongs to the SJxx20xxA family of 20 Amp high junction temperature SCRs manufactured by Littelfuse. The series offers various voltage ratings and package options, including isolated and non-isolated configurations. The SJ6020R2ATP specifically combines the 600 V rating with the standard 10 mA gate sensitivity and non-isolated TO-220 package format.

Replacement Considerations

Consult the official Littelfuse datasheet for direct cross-reference information. Potential substitutes within the same series include variants with different voltage ratings or gate sensitivities, such as the SJ6020R1ATP (6 mA sensitivity) or SJ6020L2ATP (isolated package). Verify pinout compatibility and thermal resistance differences before substitution.

FAQ

What is the difference between the R and L packages in this series?

The R package (TO-220R) features a non-isolated mounting tab common with the center lead, whereas the L package (TO-220L) provides an electrically isolated mounting tab.

How does junction temperature affect gate trigger current?

According to the datasheet, the normalized DC gate trigger current increases as the junction temperature rises from -40°C to 150°C, meaning more current may be required to trigger the device at higher temperatures.

What is the maximum allowable torque for the mounting tab?

The maximum torque to be applied to the mounting tab is 8 in-lbs (0.904 Nm).