1.INTRODUCTION The 8A-UBEC is an outer type voltage devices which works in switching-mode and gets directvoltage for receiver and other devices from a 2-3 cells lithium battery pack. lt is very suitablefor nitro powered RC helicopter (above 30 class) and big fixed-wing aircraft.Compared with the linear mode UBEC, the overall efficiency of the switch mode UBEC ismuch higher, which can extend the working time of the receiver battery pack and can reducethe heat generation significantly to avoid the loss of control caused by the over-heat problemwhich is frequently happened with the linear mode UBEC. 2.SPECIFICATIONS Output: 5V/8A or 6V/8A(Changeable with an output-voltage select switch )Input: 7.4V-12.6V (2-3 cells lithium battery pack)Size: 56mm X 35mm X 11mm (length X width X height)Weight: 35g Quiescent current: 50mA 3.FEATURES 3.1. With switch power of an integrated synchronous rectifier controlling chip design, and thepeak efficiency of the chip reaches 95%.3.2. With the output short-circuit and over-temperature protection function.3.3. Large output current. The continuous output current is 8A, and the burst output currentis 15A. 3.4. The output wires fixed a special filter which can help to reduce the electromagneticinterference, and insure proper operation of receiver.