DB107S products are widely used in various household appliances such as switching power supplies, 

LED lighting, integrated circuits, mobile communications, computers, industrial automation control equipment, 

automotive electronics, LCD TVs, IoT, smart homes, medical instruments, induction cookers, etc.
https://www.weetcap.com/Diodes-Rectifiers/WEET_DBS_DB101S_THRU_DB107S.html

The difference in usage between MB6S and DB107S: MB6S is a rectifier bridge that operates in the mid to low frequency range, 

while DB107S is a high-frequency rectifier bridge that operates in the tens of kilohertz range. 

Therefore, in order to replace the fast diode SS14, DB107S must be chosen instead of MB6S. 

A rectifier bridge is a device that encapsulates the rectifier tubes within a casing. Divided into full bridge and half bridge. 

A full bridge is a circuit that seals four diodes of a connected bridge rectifier circuit together. 

Half bridge rectifier is a circuit that combines half of two diode bridge rectifiers together. 

Two half bridges can form a bridge rectifier circuit, and one half bridge can also form a full wave rectifier circuit with a transformer and a center tap. 

When selecting a rectifier bridge, consideration should be given to the rectifier circuit and operating voltage.