24
General Rules for Transistors
The tester determines the type of transistor you
connected based on the following rules:
• If there is a common PN junction to two other
leads, the tester tries to find out if the transis-
tor is a bipolar or a JFET device.
• If the transistor has only one PN junction or a
shorted PN junction, or if the transistor is a
shorted-junction TRIAC, the tester tries to
find out if the transistor is a MOSFET.
• If the transistor has no valid PN junction, the
tester tries to find out if the transistor is an
IGBT.
22-330.fm Page 24 Friday, August 6, 1999 12:34 PM
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