SJ6040RATP

Overview

The Littelfuse SJ6040RATP is a standard recovery Silicon Controlled Rectifier (SCR) designed for high-temperature applications. It features a rated repetitive off-state voltage of 600 V and an on-state RMS current of 20 A. The device operates within a junction temperature range of -40°C to +150°C. Key electrical parameters include a maximum gate trigger current of 35 mA, a maximum holding current of 75 mA, and a non-repetitive peak on-state current capability of 300 A. It is housed in a TO-220-2 through-hole package.

Feature Summary

• Capable of operation at elevated junction temperatures up to 150°C
• Provides robust surge handling with a 300 A non-repetitive peak on-state current rating
• Designed for reliable switching with low gate trigger requirements

Applications

• Industrial motor control systems
• High-temperature power supply circuits
• General purpose rectification in demanding environments

Procurement Notes

Verify the specific suffix 'A' against official Littelfuse documentation to confirm if it denotes a specific tape-and-reel variant or packaging difference compared to the standard tube version. Ensure the component meets RoHS compliance standards required for your assembly process. Cross-reference the exact part number with manufacturer datasheets to validate pinout compatibility and thermal management requirements before finalizing procurement specifications.

Selection Notes

Select this component when a 600 V blocking voltage and 20 A continuous current are required in a TO-220-2 package. Consider its 150°C operating limit for applications exceeding standard thermal constraints. Compare the 35 mA gate trigger current against available drive circuit capabilities. Evaluate the 300 A surge rating against potential inrush currents in the target application to ensure adequate safety margins.

Part Context

This SCR belongs to the SJxx20xx series from Littelfuse, which focuses on medium-current thyristors. The SJ6040RATP shares the core silicon structure with other variants in the family but differs in packaging and specific electrical tolerances. It serves as a specialized solution for designs requiring higher thermal resilience than standard industrial SCRs while maintaining a compact through-hole footprint.

Replacement Considerations

Direct substitutes may include other 600V 20A SCRs in TO-220-2 packages from manufacturers like Vishay or STMicroelectronics. Verify that replacement parts match the 35 mA gate trigger current and 75 mA holding current limits. Ensure the alternative device supports the same 150°C junction temperature rating for equivalent thermal performance.