BAS21

Single Diodes Overview

The BAS21 is a silicon signal diode manufactured by Taiwan Semiconductor Corporation, housed in an SOT-23 (TO-236AB) surface-mount package. It features a single-element configuration with a maximum repetitive peak reverse voltage of 250 V and a continuous forward current rating of 0.2 A. The device supports a non-repetitive peak forward surge current of up to 0.625 A and dissipates a maximum power of 0.225 W. Operating temperatures range from -55 °C to 150 °C junction temperature.

Single Diodes Feature Summary

• High-speed switching capability for efficient signal processing
• Compact SOT-23 plastic surface-mount envelope for automated assembly
• High breakdown voltage suitable for general-purpose applications

Single Diodes Applications

• General purpose rectification circuits
• High-speed switching applications
• Signal clamping and protection

Single Diodes Procurement Notes

Verify the specific manufacturer designation, as the BAS21 part number is utilized by multiple semiconductor vendors including NXP, onsemi, and Diodes Incorporated. Confirm that the component matches the Taiwan Semiconductor datasheet specifications regarding the 250V reverse voltage rating and SOT-23 package dimensions before integration into the design.

Single Diodes Selection Notes

Select this component when a high-voltage single diode is required in a miniature surface-mount footprint. The 250V rating provides headroom for higher voltage environments compared to lower-rated variants like the BAS19. Ensure the thermal management strategy accounts for the 0.225W power dissipation limit in the small plastic package.

Single Diodes Part Context

This component belongs to the BAS series of silicon planar high-speed switching diodes. These devices are designed for use in applications requiring fast recovery times and compact packaging. The BAS21 specifically offers a higher voltage rating than the BAS19 and BAS20 within the same family.

Single Diodes Replacement Considerations

Cross-reference with BAS21 variants from other manufacturers such as NXP or onsemi. Verify pinout compatibility and ensure the substitute part meets the 250V reverse voltage requirement.