SJ6020R2TP

Overview

The Littelfuse SJ6020R2TP is a 20 Amp high junction temperature Silicon Controlled Rectifier (SCR) from the SJxx20xx series. It features a maximum RMS on-state current of 20 A and peak non-repetitive blocking voltage ratings of 400 V or 600 V. The device has a maximum gate trigger current (IGT) of 10 mA at approximately 1.5 V. It supports a peak non-repetitive surge current of 300 A at 60 Hz half cycle and operates within a junction temperature range of -40°C to 150°C. The component utilizes a TO-220AB non-isolated package with a thermal resistance (RθJC) of 1.0 °C/W.

Feature Summary

• High junction temperature capability up to 150°C for robust operation in demanding environments
• Low gate trigger current sensitivity of 10 mA for efficient control circuitry
• Surge current capability up to 300 A at 60 Hz half cycle
• Internally constructed isolated packages available for ease of heat sinking

Applications

• Phase control in heating systems
• Motor speed controls
• Converters and rectifiers
• Inrush current controllers
• Capacitive discharge systems for strobe lights, nailers, staplers, and gas engine ignition

Procurement Notes

Verify the specific voltage rating required, as the SJxx20xx series includes both 400V and 600V variants. Confirm the package type matches the design needs, as the 'R' suffix indicates a non-isolated TO-220AB mounting tab common with the center lead. Ensure compliance with RoHS standards if applicable to the project requirements.

Selection Notes

Select this component based on the required RMS on-state current and blocking voltage. Consider the thermal management capabilities, noting the RθJC value of 1.0 °C/W for the TO-220R package. Evaluate the gate trigger current requirements against the driver circuit's output capability. Review the derating curves for case temperature versus RMS on-state current to ensure reliable operation under expected load conditions.

Part Context

The SJ6020R2TP belongs to the SJxx20xx series of 20 Amp high junction temperature SCRs manufactured by Littelfuse. This series is designed for uni-directional switch applications requiring high reliability and thermal performance. The part numbering system encodes voltage, current, sensitivity, and package type, allowing for easy identification of similar components within the family.

Replacement Considerations

Direct replacements must match the 20A current rating, 600V blocking voltage, and 10mA gate sensitivity. Verify that alternative SCRs offer comparable surge current capabilities and thermal resistance values. Ensure the replacement package is compatible with the existing PCB footprint and mounting constraints.