"Tiny Cooling Fan" is a low-power Schottky rectifier diode, high current, ultra high-speed semiconductor rectifiers. Reverse recovery time is very short (as small as a few nanoseconds), the forward voltage drop is only 0.4V, while the rectified current, but can reach several thousand amperes. These "Tiny Cooling Fan" excellent feature is the fast recovery diode unmatched. But Schottky diode peak reverse voltage is low (usually no more than 100V), suitable for low voltage, high current rectification or freewheeling. Voltage characteristics of Schottky rectifier. In selecting the parameters of the pipe must set aside a certain margin, in other words, all devices should make derating. "Tiny Cooling Fan" generally leaving about double the margin is appropriate, I will cause excessive waste. For example, select the pipe 20A / 80V can be long-term reliable operation under 10A, 40V condition.