SJ6020N1ATP

Overview

The Littelfuse SJ6020N1ATP is a high-temperature Silicon-Controlled Rectifier (SCR) from the SJxx20xxA series, designed for uni-directional switching applications. It features a TO-263AB (D2-Pak) surface-mount package with a rated repetitive off-state voltage of 600 V and an RMS on-state current of 20 A at a case temperature of 130 °C. The device supports a maximum junction temperature of 150 °C and offers sensitive gate triggering with a maximum gate trigger current of 6 mA at approximately 1.5 V. It provides a peak non-repetitive surge current capability of 300 A at 60 Hz and includes AEC-Q101 automotive qualification.

Feature Summary

• High thermal stability supporting operation up to 150°C junction temperature
• Sensitive gate control requiring minimal trigger current for microprocessor interfacing
• Automotive-grade reliability through AEC-Q101 qualification
• Surface-mount D2-Pak packaging for automated assembly

Applications

• AC generator rectifiers
• Battery voltage regulators
• Inrush current controllers in AC to DC converters
• Power tool controls
• White goods appliance management

Procurement Notes

Verify component authenticity by checking the date code marking format against Littelfuse standards. Confirm the specific suffix 'TP' indicates tube packing rather than embossed carrier reels. Ensure the ordering part number matches the required voltage rating and gate sensitivity specifications before finalizing procurement orders.

Selection Notes

Select this component when a surface-mount SCR is required for phase control or rectification in space-constrained designs. The TO-263 package facilitates direct heat sinking to printed circuit boards. Verify that the application's peak surge currents remain within the 300 A limit and that the gate drive circuit can supply the necessary 6 mA trigger threshold reliably.

Part Context

This device belongs to the SJxx20xxA family of 20 Amp high junction temperature SCRs manufactured by Littelfuse. The 'N' designation identifies the TO-263AB surface-mount package variant, while the '1' suffix specifies the 6 mA gate sensitivity level. The 'A' suffix denotes AEC-Q101 automotive qualification status.

Replacement Considerations

Direct replacements include other SJxx20xxA series devices with identical electrical ratings but different packages, such as SJ6020R1ATP (TO-220). Cross-package substitution requires verifying thermal resistance differences and mounting hole alignment on the target PCB layout.

FAQ

What is the maximum allowable case temperature for the SJ6020N1ATP?

The maximum operating junction temperature is 150 °C. The RMS on-state current rating of 20 A is specified at a case temperature of 130 °C.

How does the gate trigger current vary with temperature?

The gate trigger current increases as the junction temperature rises. Designers should consult the normalized DC gate trigger current graph in the datasheet to ensure sufficient drive current at elevated temperatures.

Is the mounting tab electrically isolated?

No, the TO-263AB (N-package) has a non-isolated mounting tab common with the center lead (anode), unlike the TO-220L package which offers isolation.