SJ6020NTP

Overview

The Littelfuse SJ6020NTP is a high junction temperature Silicon Controlled Rectifier (SCR) from the SJxx20xx series, designed for uni-directional switching applications. It features a TO-263AB (D2-Pak) surface mount package with a maximum RMS on-state current of 20 A at a case temperature of 130 °C and an average on-state current of 12.8 A. The device supports a repetitive peak off-state voltage of 600 V and offers a sensitive gate trigger level of 6 mA maximum at approximately 1.5 V. It withstands non-repetitive surge currents up to 300 A at 60 Hz half-cycle and operates within a junction temperature range of -40 °C to 150 °C.

Feature Summary

• High thermal capability with a maximum junction temperature of 150 °C
• Sensitive gate design enabling direct microprocessor interface with low trigger current
• Electrically isolated semiconductor device recognized by UL 1557
• Halogen-free and RoHS compliant construction

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm the exact package type and packing mode. The 'N' designation indicates a TO-263AB surface mount package, while 'TP' denotes tube packaging. Confirm that the required gate sensitivity matches the '1' suffix for 6 mA trigger current. Ensure the application environment supports the specified thermal ratings and mounting requirements for the D2-Pak form factor.

Selection Notes

Select this component when a surface mount SCR with high thermal endurance is required. The SJ6020NTP provides a 20 A RMS rating suitable for moderate power applications where space constraints favor the TO-263AB package over through-hole options. Consider the 6 mA gate sensitivity for compatibility with low-power logic drivers. Evaluate the thermal resistance and heat sinking needs to maintain the junction temperature within the 150 °C limit during continuous operation.

Part Context

This part belongs to the SJxx20xx series of 20 Amp High Junction Temperature SCRs manufactured by Littelfuse. The series includes variants with different voltage ratings (400 V or 600 V), gate sensitivities (6 mA, 10 mA, or 35 mA), and packages (TO-220L, TO-220R, and TO-263AB). The SJ6020NTP specifically combines the 600 V rating, 6 mA sensitivity, and TO-263AB surface mount package.

Replacement Considerations

Direct replacements must match the 20 A current rating, 600 V blocking voltage, and TO-263AB package. Verify gate trigger characteristics and thermal performance. Other parts in the SJxx20xx series with different sensitivities or packages may serve as alternatives if electrical parameters align with the circuit requirements.