Bipolar Junction Transistors (Bjts) - Peak Electronics DCA75 User Manual

Atlas DCA Pro User Guide

Bipolar Junction Transistors (BJTs)

Bipolar Junction Transistors are simply "conventional"
transistors, although variants of these do exist such as
Darlingtons, devices with free-wheeling diodes, resistor
shunted types and combinations of these types. All of these
variations are automatically identified by the DCA Pro and their schematic
symbol is displayed on the screen. Both NPN and PNP types are supported.
The 3 test clips can be applied to the transistor in any configuration.
As an example, testing a common
PNP transistor such as the 2N5401
will result in a display similar to this:
This example shows that the Red test
clip is connected to the Emitter, the
Green is connected to the Base and
the Blue test clip is connected to the
Collector.
Pressing scroll-off allows further details to be displayed.
The DC current gain (h
leakage current (I
Refer to the following sections for more details on these measurements.
), base emitter voltage drop (V
FE
Leak) are all shown along with their test conditions.
C
PNP Silicon BJT
Red-E Green-B Blue-C
h FE =106
h FE =106
at I C =5.00mA
V BE =0.754V
V BE =0.754V
at I B =5.00mA
I C Leak=0.000mA
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April 2015 – Rev 1.4
) and collector
BE