BAS521-QX

Single Diodes Overview

The BAS521-Q is a high-voltage switching diode from Nexperia, encapsulated in an ultra-small SOD523 (SC-79) flat lead Surface-Mounted Device plastic package. It features a repetitive peak reverse voltage of 300 V and a maximum forward current of 250 mA. The device exhibits a typical reverse recovery time of 16 ns with a maximum of 50 ns. It is qualified according to AEC-Q101 standards, making it suitable for automotive applications.

Single Diodes Feature Summary

• High switching speed with low reverse recovery time
• High reverse voltage capability up to 300 V
• Qualified for automotive applications per AEC-Q101 standard
• Ultra-small SMD plastic package for space-constrained designs

Single Diodes Applications

• High-speed switching circuits
• High-voltage switching applications

Single Diodes Procurement Notes

Verify the specific ordering suffix matches the required packaging configuration. Confirm that the AEC-Q101 qualification status aligns with your automotive project requirements. Ensure thermal management strategies account for the specified junction-to-ambient resistance values during operation.

Single Diodes Selection Notes

Select this component when high reverse voltage blocking is required alongside fast switching characteristics. The SOD523 package is ideal for compact PCB layouts. Consider the 300 V rating for high-side or low-side switching where higher voltage margins are necessary compared to standard low-voltage diodes.

Single Diodes Part Context

This part belongs to Nexperia's BAS series of high-voltage switching diodes. It shares the SOD523 footprint with other small-signal diodes but offers significantly higher voltage ratings. The -Q suffix indicates automotive qualification, distinguishing it from general-purpose variants within the same electrical family.

Single Diodes Replacement Considerations

Check pinout compatibility and voltage ratings against existing designs. Verify if lower voltage alternatives like BAS521 without the Q suffix meet non-automotive needs. Ensure substitute parts support the required 300 V reverse voltage and fast recovery specifications.