Dual common-cathode diode in a small outline package
The Infineon BAV70WH6433XTMA1 is a dual switching diode with a common-cathode configuration, rated for 80 V reverse voltage and 200 mA forward current per diode. It is housed in the SC-70 (SOT-323) surface-mount package, a compact 3-pin outline with 0.65 mm lead pitch. The 4 ns reverse recovery time qualifies it for high-frequency switching tasks — rectification, clamping, and logic-level shifting in circuits up to several MHz. The common-cathode pair is useful for full-wave rectification or as a steering diode pair in redundant supply OR-ing circuits.
Last-buy window — plan the BOM transition now
This part carries a Last Buy lifecycle status from Infineon. That means the manufacturer has announced end-of-life and is accepting final orders only during a defined last-time-buy window. Once that window closes, the part will no longer be manufactured. For a BOM line using this diode, the procurement action is clear: either place a lifetime buy to cover forecasted production needs, or qualify a replacement. No official successor part is listed on the Infineon lifecycle notice, so a pin-compatible substitute must be evaluated from the broader BAV70 family or an alternative dual common-cathode diode in SC-70.
Package and mounting
The SC-70 (SOT-323) package is one of the smaller standard surface-mount outlines — about 2.0 mm × 1.25 mm body with three leads on 0.65 mm pitch. Under a hot-air station, the part lifts cleanly if you preheat the board to 100 °C and use a fine nozzle. The key is getting the solder paste volume right: too much and the part floats, too little and the joint wicks up the lead. Pin 1 identification is marked by a bevel on the package body — look for the chamfered corner. The common cathode is on pin 2 (the centre lead), with the two anodes on pins 1 and 3. Orientation is unambiguous once you spot the bevel.
Sourcing this BAV70 variant
Given the Last Buy status, buyers should expect limited stock in the spot market and plan accordingly.