X0203NN 5AA4

Scrs Overview

The X0203NN 5AA4 is a sensitive gate Silicon Controlled Rectifier (SCR) manufactured by STMicroelectronics. It features an 800 V rated repetitive off-state voltage and a 1.25 A RMS on-state current capability. The device is housed in a surface-mount SOT-223 package, specifically the TO-261AA variant. Key electrical parameters include a maximum off-state leakage current of 5 uA at rated voltage and a forward voltage drop of approximately 1.5 V. It supports a non-repetitive surge current of 25 A and operates within a temperature range of -40°C to +125°C.

Scrs Feature Summary

• Sensitive gate architecture designed for low-power triggering applications
• Surface-mount construction utilizing the SOT-223 package for automated assembly
• High thermal stability with a maximum junction temperature rating of 125°C

Scrs Applications

• On/off switching functions in circuits with limited gate drive current
• Lighting control systems requiring high-voltage isolation
• General-purpose power switching in consumer electronics

Scrs Procurement Notes

Verify the specific ordering suffix '5AA4' to ensure compatibility with required packaging formats such as cut tape or reel. Confirm that the SOT-223 footprint matches the target PCB design. Check for lifecycle status updates, as distribution channels may list this component as obsolete or end-of-life depending on regional inventory availability.

Scrs Selection Notes

Select this component when a robust SCR solution is needed for moderate current loads up to 1.25 A. The sensitive gate characteristic makes it suitable for microcontroller-driven interfaces where minimal gate current is available. Ensure the 800 V blocking capability aligns with the peak reverse voltage present in the application circuit.

Scrs Part Context

This part belongs to the X02 series of thyristors from STMicroelectronics. The series focuses on providing reliable switching performance in compact surface-mount packages. The X0203NN variant specifically addresses applications requiring higher current handling than standard small-signal SCRs while maintaining ease of integration into modern printed circuit boards.

Scrs Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout compatibility and thermal characteristics before considering alternative manufacturers.