Taking the common SMD Schottky diode SS14, ss24 and SS34 as an example, the difference between the three tubes is mainly in the current. There are three packages: SMA, SMB and SMC.

In terms of cost and volume, the smallest SMA / do-214ac package is preferred.

From the following pictures, the three packages are similar, and the main volume is different. It can be seen that SMA < SMB < SMC

1、SMA/DO-214AC

2、SMB/DO-214AA

3、SMC/DO-214AB