Part Number : MMSZ3V9T1
Function : 3.9V, Zener Voltage Regulator, Diode
Package : SOD-123 Type
Maker : ON Semiconductor
Pinouts : 
Description :
Three complete series of Zener diodes are offered in the convenient, surface mount plastic SOD−123 package. These devices provide a convenient alternative to the leadless 34−package style.
Features :
1. 500 mW Rating on FR−4 or FR−5 Board
2. Wide Zener Reverse Voltage Range −2.4 V to 56 V
3. Package Designed for Optimal Automated Board Assembly
4. Small Package Size for High Density Applications
5. ESD Rating of Class 3 (> 16 kV) per Human Body Model
6. AEC−Q101 Qualified and PPAP Capable
6. SZ Prefix for Automotive and Other Applications Requiring Unique Site
7. Pb−Free Packages are Available
Datasheet PDF Download : 
Others datasheet of same file :
MMSZ10T1G, MMSZ11T1G, MMSZ12T1G, MMSZ13T1G, MMSZ15T1G