UBEC 8A, 2-3 cells LiPo, selectable output voltage 5/6V
Hobbywing
HWUBEC8
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The 8A-UBEC is a switch-mode DC-DC regulator capable to deliver 8 - 15A.  

Input Voltage:     6 - 12V  (2 - 3 cells LiPo)
Output Voltage:  5 or 6V (manual selectable)
Output Current:  8A continuous, 15A maximum

This UBEC is very suitable for big fixed-wing aircrafts because it can supply a big current and it contains 2 output terminals towards the receiver for improved reliability. It also contains a battery capacity indicator (4 leds) and an on/off switch.

This UBEC can be used with a 2-3 cells LiPo battery pack.

Compared with the linear mode UBEC, the overall efficiency of the switching-mode BEC is much higher, so it can extend the working time of the receiver battery pack, and because a switch mode UBEC can significantly reduce the heat emission, it can avoid the loss of control caused by the over-heat problem which can happen with the linear mode UBEC.

Documentation: UBEC_8A User manual
                                                                                                                                                                                                         

1  Specification

1.1 Output Voltage: 5V or 6V (Changeable with an output-voltage select switch)
1.2 Continuous output current: 8 Amps
1.3 Burst output current: 15 Amps
1.4 Input: 6V-12.6V (2-3 cells lithium battery pack
1.5 Quiescent current: 60mA
1.6 Size: 42mm*39mm*9mm (length*width*height)
1.7 Weight: 36g

2  Features
2.1 Designed with an advanced switching-mode DC-DC regulator IC.
2.2 The output current is very large.
2.3 With the output short-circuit protection function.
2.4 A metal shield covers almost all the electronic components, and a filter ring is attached with the output wires to significantly reduce the electromagnetic interference.
2.5 Automatically detects the number of the lithium battery pack (2 cells or 3 cells).
2.6 Shows the battery capacity with 4 indicators (LEDs).  
2.7 Shows the working status with an indicator (LED), lights when the output is in normal range.
2.8 There are 2 output leads to reduce the resistance when connecting the UEBC to the receiver.