SJ6020L2TP

Overview

The Littelfuse SJ6020L2TP is a silicon-controlled rectifier (SCR) from the SJxx20xx series, designed for high-temperature uni-directional switching applications. It features a TO-220L isolated package with a maximum junction temperature of 150°C. The device supports an RMS on-state current of 20 A at a case temperature of 105°C and an average on-state current of 12.8 A under the same conditions. It offers blocking voltage ratings of 400 V or 600 V, with a peak non-repetitive surge current capability of up to 300 A at 60 Hz half-cycle. The gate trigger characteristics include a maximum sensitivity of 10 mA at approximately 1.5 V.

Feature Summary

• High junction temperature operation up to 150°C
• Electrically isolated semiconductor device recognized to UL 1557
• Low gate current trigger level for sensitive control interfacing

Applications

• Phase control in heating systems
• Motor speed controls
• Converters and rectifiers
• Inrush current controllers

Procurement Notes

Verify component authenticity by checking the marking code YMXXX against the official Littelfuse part numbering system. Confirm the specific voltage rating (400V or 600V) and packaging type (Tube Pack TP) required for the design. Ensure that the procurement source provides valid traceability documentation consistent with Littelfuse manufacturing standards.

Selection Notes

Select this component when high thermal stability is required, as it operates reliably up to 150°C. The TO-220L package provides electrical isolation between the mounting tab and the internal circuitry, simplifying heat sinking without additional insulators. Verify that the application's peak surge currents do not exceed the 300 A rating and that the gate drive circuit can supply the necessary 10 mA trigger current.

Part Context

This SCR belongs to the SJxx20xx series, which includes variants with different packages (TO-220R, TO-263) and gate sensitivities (6 mA, 10 mA, 35 mA). The 'L' suffix denotes the isolated TO-220 package, while '2' indicates the 10 mA gate sensitivity. Other series members share similar electrical ratings but differ in physical mounting configurations and trigger requirements.

Replacement Considerations

Direct replacements within the same series include SJ6020L1TP (6 mA sensitivity) and SJ6020L3TP (35 mA sensitivity), provided the gate drive circuitry is adjusted accordingly. Cross-package alternatives like SJ6020NxTP offer surface mount options but require PCB redesign due to different pinouts and thermal characteristics.