How to judge the positive and negative of Schottky diode?
Generally, the normal pin diode can judge the positive and negative poles by the length of the pin or the area of the inside of the straw hat. The ordinary chip diode can be judged according to the negative electrode at the end of the bar, and the negative electrode of the LED is also generally There is a sign. Today, the board is used, and the Schottky rectifier diode MBRF30100CT is used to find that the positive and negative poles are not labeled like other common diodes. For safety reasons, you can use a multimeter to measure the positive and negative poles. Here is a digital multimeter test method: digital When the multimeter is used to measure the diode, the red and black two-pens with the multimeter's resistance (usually X100 or X1K) are connected to the two poles of the diode, and the resistance will be small once, and the resistance is very close. In the case of a small resistance, the red pen is connected to the positive electrode.
How do the positive and negative electrodes of the Schottky diode determine the positive and negative electrodes during installation? Many people will inevitably have doubts during the installation, and experienced friends will know it at a glance.
First, look at the symbol logo. The sign of the diode is generally indicated on the surface of the Schottky diode, the positive pole is indicated by a triangular arrow symbol and the other end is a negative pole.
Second, look at the component color points. On the case of point-contact Schottky diodes, there are generally polar dots (white or red). The end of the common color point is the positive pole. Other diodes are marked with a color ring, and one end of the color ring is a negative electrode.
The first measurement connected to the black test lead is the positive pole, and the end connected to the red test lead is the negative pole.