SOT-93 Package
SOT-93 Body style Transistor or FET package
 SOT-93 Package |
SOT-93 Pin out Base, pin 1 Collector, Pin 2 Emitter, pin 3 Collector, pin 4 [tab] Tab my have a different function in some cases For example when holding a FET Note Some data sheets indicate: The center pin is in electrical contact with the mounting tab. A SOT-23 is also called a TO-218 |
The SOT-93 package is a 3-terminal molded plastic through hole component. The leads are shown straight in this picture, but they may also be ordered reformed. Normally the center lead is bent so that it mates to the printed wiring board just in front of the other two leads, which allows for larger pads on the PWB.
The metal tab may be either bolted to a metal surface which would act as a heat sink, or a separate heat-sink may be attached to the tab and secured with a nut and washer. Note that the tab is electrically connected to the collector of the transistor [in this case], so the heat-sink would need to be isolated from other conducting circuits [and ground].
SOT-93 Plastic Semiconductors;
NPN High Power Transistor; TIP35
NPN High Power Transistor; MJE4343
PNP High Power Transistor; TIP36
PNP High Power Transistor; MJE4353
PNP Power Transistor; BD246 [pictured]
SCR; HNS025 [1. Cathode, 2. Anode, 3. Gate, Tab. Anode]
TRIAC; HIT216 [1. MT1, 2. MT2, 3. Gate, Tab. Isolated]
When the tab is connected, the term non-isolated is used.
