BAV21W-E3-18

Overview

The BAV21W-E3-18 is a high-voltage small signal switching diode manufactured by Vishay Semiconductors. It features a silicon epitaxial planar construction in an SOD-123 surface-mount package. Key electrical parameters include a maximum repetitive peak reverse voltage of 250 V and a continuous DC forward current rating of 250 mA. The device exhibits a typical reverse recovery time of 50 ns, a maximum leakage current of 100 nA at 200 V, and a diode capacitance of 1.5 pF at 0 V. It operates within a temperature range of -55 °C to +150 °C.

Feature Summary

• Silicon epitaxial planar construction for general-purpose switching applications
• High-voltage capability with a 250 V repetitive peak reverse voltage rating
• Fast switching performance characterized by a 50 ns reverse recovery time
• RoHS-compliant commercial grade designation

Applications

• General purpose switching circuits
• High-voltage signal processing
• Clamping and protection applications

Procurement Notes

Verify the specific ordering code suffix against official Vishay documentation to confirm packaging options and compliance status. Ensure that the selected variant matches the required tape and reel specifications for automated assembly processes. Cross-reference the part number with the manufacturer's latest datasheet to validate current availability and technical specifications before finalizing procurement orders.

Selection Notes

Select this component when a high-voltage small signal diode with fast switching characteristics is required. The 250 V reverse voltage rating distinguishes it from lower-voltage variants like the BAV19W or BAV20W. Consider the SOD-123 package dimensions for board space constraints and verify thermal management requirements based on the specified power dissipation limits under expected operating conditions.

Part Context

This component belongs to the BAV19W, BAV20W, and BAV21W series of high-voltage small signal switching diodes. All models share identical physical packaging and thermal characteristics but differ in their reverse voltage ratings. The BAV21W specifically provides the highest voltage tolerance within this family, making it suitable for applications requiring robust reverse blocking capabilities.

Replacement Considerations

Direct substitutes within the same Vishay series include BAV19W-E3-18 and BAV20W-E3-18, provided the application voltage does not exceed their respective ratings. Verify that any replacement maintains the required reverse voltage margin and switching speed specifications.