"Tiny Cooling Fan" fast recovery following 20A and ultrafast recovery diodes, Schottky diodes are mostly used T0-220 package outline its equivalent circuit shown in Figure 9-15. According to the internal structure, can be divided into single-tube, tube (also known as dual pipe) two. "Tiny Cooling Fan" on the interior of the tube contains two tubes, according to two different diode-connected, there are common cathode tube, anode tube points. Table 9-5 lists the performance comparison of three rectifier typical products, which are used T0-220 package. "Tiny Cooling Fan" tens of amperes tubes generally use T0-3P metal shell package. Several hundred to several thousand amperes tube is used bolt-type or flat package.