Often indicates the manufacturer, product line, or series.
The string is the most distinctive part of the code and strongly suggests the component's function. We can hypothesize it stands for S uper F ast R ecovery R ectifier. This hypothesis is strongly supported by the existing component SUF101B , a 1.0 Amp surface mount super fast recovery rectifier manufactured by SECOS. Therefore, ZTSUFV101B10 very likely describes a Super Fast Recovery Rectifier from a "ZT" series, with the "V" potentially indicating a specific characteristic like voltage rating or a variant with a different package. ztsufv101b10