200 V, 250 mA fast-recovery signal diode for automotive and industrial clamping
The Vishay BAV21WS-HE3-08 is a general-purpose fast-recovery signal diode rated for 200 V reverse voltage and 250 mA average rectified current, packaged in a SOD-323 surface-mount case. Its 50 ns reverse recovery time suits it for high-frequency rectification, snubber clamping, and flyback catch-diode roles where a standard 1N4148 would be too slow or lack the voltage headroom.
This part carries AEC-Q101 qualification, meaning it has passed the automotive-grade stress tests for temperature cycling, humidity, and high-temperature reverse bias. It is intended for under-hood and chassis-domain electronics where the junction temperature can reach 150 °C maximum. Reverse leakage is 100 nA at 200 V, a figure that rises with junction temperature but stays within the guard band for most automotive sensor and actuator interfaces.
SOD-323 footprint and assembly considerations
The SOD-323 package (SC-76) has a 1.7 mm × 1.25 mm body with gull-wing leads on 1.25 mm pitch. The small footprint suits dense PCB layouts, but the copper pad area under the cathode tab sets the thermal resistance — a solid ground-plane connection is recommended for designs running near the 250 mA continuous rating. The part is supplied in Tape & Reel (TR) or Cut Tape (CT) options, compatible with standard pick-and-place equipment.
No official successor or second-source cross-reference is listed; for dual-sourcing, evaluate Vishay's own BAV21WS series siblings with the same SOD-323 footprint.