Admin Table of Contents
How do you read a transistor with a multimeter?
Connect the base terminal of the transistor to the terminal marked positive (usually coloured red) on the multimeter. Connect the terminal marked negative or common (usually coloured black) to the collector and measure the resistance. It should read open circuit (there should be a deflection for a PNP transistor).
How can check transistor pin using multimeter?
Steps to identify the PNP type transistor: Keep the positive probe to the pin-1 (Emitter) of the transistor. Touch the negative probe to the center pin (Base). You will see some voltage in the multimeter. Similarly touch the negative probe to the center pin (Base) with respect to the pin-3 (collector).
How do you read a transistor number?
The typical format for the transistor is a digit, letter and serial number. The first digit is the number of leads minus one. An ordinary bipolar transistor has three leads, so the first digit for it will be 2. The letter N is for semiconductors, so this will be the letter written on a transistor using this system.
How do you identify the pins of a transistor?
In plastic casing, one side of the transistor is Flat which is the front side and the pins are arranged serially. To identify the pins, keep the front flat side facing you and count the pins as one, two etc.
How do you test a transistor?
Transistors are commonly used as either a switch or a current amplifier. You can test a transistor with a multimeter that has a diode test function. A transistor is basically 2 diodes that share one end.
How do you test a PNP transistor?
If you are testing PNP transistor, you should see “OL” (Over Limit). Keep the postitive lead on the BASE (B) and place the negative lead to the COLLECTOR (C).
How do you test a bipolar transistor with a multimeter?
The diode test using an analogue multimeter can be extended to give a simple and straightforward confidence check for bipolar transistors. Again the test using a multimeter only provides a confidence check that the bipolar transistor has not blown, but it is still very useful.