BAS521B-QF

Single Diodes Overview

The BAS521B-Q is a high-voltage switching diode manufactured by Nexperia USA Inc. It utilizes an ultra-small SOD523 (SC-79) flat lead surface-mounted device plastic package. The component supports a repetitive peak reverse voltage of 250 V and a maximum forward current of 250 mA. Key electrical characteristics include a maximum reverse recovery time of 50 ns, a maximum reverse leakage current of 100 nA at 200 V, and a typical forward voltage of 1.25 V at 200 mA. The device operates within a junction temperature range up to 150 °C and is qualified according to AEC-Q101 standards.

Single Diodes Feature Summary

• High switching speed with a reverse recovery time of 50 ns or less
• Low leakage current capability of 100 nA or less
• High reverse voltage rating supporting up to 250 V repetitive peak reverse voltage
• Qualified for automotive applications in accordance with AEC-Q101

Single Diodes Applications

• High-speed switching circuits
• General-purpose switching functions
• Voltage clamping applications
• Reverse polarity protection

Single Diodes Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct package type and marking code alignment. Confirm that the procurement channel provides valid traceability records for AEC-Q101 qualified components. Ensure storage conditions comply with moisture sensitivity level requirements prior to soldering. Validate that the received units match the specified SC-79 package dimensions and pin configuration.

Single Diodes Selection Notes

Select this component when circuit designs require a compact footprint combined with high-voltage handling capabilities. The low capacitance characteristic makes it suitable for high-frequency signal paths where minimal parasitic effects are critical. Evaluate thermal resistance parameters if the application involves significant power dissipation or elevated ambient temperatures. Ensure the required forward current does not exceed the continuous rating under expected operating conditions.

Single Diodes Part Context

This device belongs to the BAS521B series of high-voltage switching diodes produced by Nexperia. It is designed as a replacement for standard silicon rectifiers requiring smaller form factors. The product line emphasizes reliability in automotive environments while maintaining low cost and high performance. The SOD523 package allows for automated assembly in space-constrained printed circuit board layouts.

Single Diodes Replacement Considerations

Public confirmed substitute part numbers: None identified.