The KT857A is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the KT857A transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.
The KT857A transistor symbol shows an arrow from the base into the emitter. This means that the current flows from collector terminal to emitter terminal.
Circuit diagram symbol of the KT857A transistor as follows.
| Transistor Code | KT857A | |
|---|---|---|
| Transistor Type | BJT | |
| Transistor Polarity | NPN | |
| Transistor Material | Silicon(SI) | |
| Collector Power Dissipation (Maximum) | PC | 60W |
| Collector-Base Voltage (Maximum) | VCB | 250V |
| Collector Current (Maximum) | IC | 7A |
| Operating Junction Temperature (Maximum) | TJ | 150°C |
| Emitter-Base Voltage (Maximum) | VEB | 6V |
| Forward Current Transfer Ratio (hFE Value) | 7.5 | |
| Transition Frequency | FT | 9.9MHz |
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