SC70 is just the name of the package, it corresponds to hundreds of thousands of models, so of course it is not found. However, you can reverse check the model from the abbreviated code on the tube body, and another way is to test it with an instrument. MBD330DW, silkscreen T4, SOT363 package, Schottky diode. The patch switch diode 1N4148WS T4 0805 package SOD-323 has a higher probability. A single backward check of the patch diode from T4 printing code can find 4-5 completely different corresponding models.