What is BEC/UBEC?

What is BEC/UBEC?

BEC stands for Battery Elimination Circuit. It’s just a fancy name for voltage regulator, which converts main LiPo battery pack voltage to a lower voltage (e.g. 3S 11.1V or 4S 14.8V or more higher 12s/14s/20s to 5V or other lower voltage). BEC is usually built into ESC, and as the name suggests, it eliminates the need for a separate battery to power the 5V or other low voltage electronic devices (such as receiver of remote).

UBEC stands for universal BEC or sometimes ultimate BEC. It’s used when ESC doesn’t have built-in BEC, or standalone power system is required. They generally are more efficient, more reliable and able to provide more current than BEC. The UBEC is connected directly to the main battery.