SJ6020RTP

Overview

The Littelfuse SJ6020RTP is a 20 Amp high junction temperature Silicon Controlled Rectifier (SCR) in the TO-220 non-isolated package. It features a peak repetitive reverse voltage of 600 V and an RMS on-state current of 20 A at a case temperature of 105 °C. The device supports a maximum average on-state current of 12.8 A under the same thermal conditions. Gate trigger current options include 6 mA, 10 mA, or 35 mA maximum, with a gate trigger voltage of approximately 1.5 V. Surge capability reaches 300 A for a single half-cycle at 60 Hz. The component operates within a junction temperature range of -40 °C to 150 °C.

Feature Summary

• Halogen-free and RoHS compliant construction
• High junction temperature rating up to 150°C
• Internally constructed isolated packages available for ease of heat sinking
• Recognized to UL 1557 as an electrically isolated semiconductor device

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 to confirm the exact gate sensitivity and packaging configuration required for your design. The 'TP' suffix indicates tube packing, while 'RP' denotes embossed carrier reel packaging. Ensure the selected variant matches the necessary isolation requirements, as the R-package is non-isolated compared to the L-package. Cross-reference the datasheet revision date to ensure compliance with current specifications before finalizing procurement orders.

Selection Notes

Select the SJ6020RTP when a non-isolated TO-220 package is suitable for the application's thermal management needs. Verify that the circuit's peak repetitive reverse voltage does not exceed 600 V. Consider the gate trigger current requirement; this specific model variant typically corresponds to the standard 35 mA sensitivity unless otherwise specified by additional suffixes. Ensure adequate heat sinking is provided to maintain the case temperature within the rated limits for the desired RMS current.

Part Context

This component belongs to the SJxx20xx series of high-temperature SCRs manufactured by Littelfuse Inc. The series offers various voltage ratings and package types, including isolated and non-isolated options. The SJ6020RTP specifically utilizes the TO-220AB non-isolated mounting tab configuration, distinguishing it from the isolated L-package and surface-mount N-package variants within the same electrical family.

Replacement Considerations

Direct substitutes within the same series include SJ6020LTP (isolated TO-220) or SJ6020NTP (TO-263), provided the package form factor and isolation requirements align with the board layout. Verify that any replacement maintains the 600 V blocking voltage and 20 A current rating. Ensure the gate sensitivity characteristics match the driving circuit capabilities to guarantee reliable triggering.