Reverse recovery time trr: refers to reverse the specified load, maximum forward current and reverse voltage transient recovery time. Zero bias capacitance CO: refers to the voltage across the diode is zero, diffusion capacity of the capacitor and the junction capacitance and. It is noteworthy that, due to the manufacturing process, even if the same type of diode parameters of discrete also great. Parameters given in the manual is often a range, if the test conditions change, rectifier diode, the corresponding parameters will change, for example, at 25 ° C measured 1N5200 Series plastic silicon rectifier diode IR less than 10uA, and in 100 When ° C IR then becomes less than 500uA. Most of the full-bridge rectifier to detect the entire bridge, are marked with "+", "-", "~" symbol (where "+" for the positive rectified output voltage, 1n rectifier diode, "-" for the output voltage negative, "~" AC voltage input), it is easy to determine the respective electrodes. Rac electronic information network detection, it may separately measure the "+" and the two "-" pole, the two "-" pole and the "-" positive and negative resistance value between each pole of the rectifier diode (ordinary diode The same measurement method) is normal, it can determine whether the full-bridge has been damaged. If the measured bridge across the four positive and negative resistance values ??are 0 or diodes are infinite, you can determine that the diode breakdown or open circuit damage. Detection of the half-bridge is composed of two half-bridge rectifier diodes, were measured by using a multimeter positive and negative resistance values ??of the two diodes inside the half-bridge is normal, it can determine the half-bridge is normal. Reverse breakdown voltage detector diode reverse breakdown voltage (voltage value) to test meter to measure the transistor DC parameters. The method is: When measuring diode, should "NPN / PNP" select key test table to NPN state, within and then tested positive diode connected to the test table "C" jack, insert the negative test table "e "Jack, rectifier diode, and then press the" V (BR) "button, the test table to indicate the diode reverse breakdown voltage. Also available megohmmeter and a meter to measure the diode reverse breakdown voltage measurement tested positive phase diode cathode and megger, the cathode of the diode is connected to the positive and megger, 50a rectifier diodes, while with a multimeter (placed in an appropriate DC voltage profile) monitoring the voltage across the diode. As shown in Figure 4-71, shake megger handle (should slow gradually speed up), the voltage across the diode to be stable and no longer rises, the voltage value that is the diode reverse breakdown voltage. The role of the rectifier diode, gold credit (online consultation), rectifier diode provided by Qingdao integrity Technology Co., Ltd. Qingdao integrity Technology Co., Ltd. (www.qdjcx.com) is in Qingdao, Shandong diode leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Ethical Leadership in gold with the staff warmly welcome all inquiries negotiations to create a better future gold credit.