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TK251A NPN Transistor

The TK251A is a bipolar junction transistor (BJT) with an NPN-type configuration. That means the TK251A transistor has a positively charged layer between two negatively charged layers. This transistor has three terminals Base, Collector, and Emitter.

The TK251A 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 TK251A transistor as follows.

Circuit diagram symbol of the TK251A transistor

TK251A Transistor Specification

Transistor Code TK251A
Transistor Type BJT
Transistor Polarity NPN
Transistor Material Silicon(SI)
Package TO5
Collector Power Dissipation (Maximum) PC 0.5W
Collector-Base Voltage (Maximum) VCB 40V
Collector-Emitter Voltage (Maximum) VCE 20V
Collector Current (Maximum) IC 0.25A
Operating Junction Temperature (Maximum) TJ 150°C
Emitter-Base Voltage (Maximum) VEB 6V
Forward Current Transfer Ratio (hFE Value) 20
Transition Frequency FT 100MHz

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