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A UBEC (universal battery eliminator circuit) is a device that converts a high voltage, such as 25V from a 6S LiPo, to a lower voltage so the whole aircraft can run from one primary battery. The Hobbywing 5V/6V 3A switch-mode UBEC is a switch-mode DC regulator separate from the ESC.
It takes high-voltage (5.5V to 26V) power from your battery pack and converts it to a consistent, safe voltage for your receiver, gyro and servos. The listing says it uses an advanced switch-mode DC-DC regulator IC, which removes the worry about overheating.
A status LED shows the working state and lights when the output is in the normal range.
5.5V to 26V input: 2 to 6 cell LiPo or 5 to 18 cell NiMH packs.
Switchable 5V/6V output: 3A continuous.
Low ripple: 50mVp-p at 2A and 12V.
Status LED: lights when the output is normal.
Switch-mode regulator: efficient and cool.
A BEC or UBEC (battery eliminator circuit) converts the high voltage of a flight battery to a lower, steady voltage for receivers, servos, flight controllers and other electronics. A switching regulator does this efficiently and gives off little heat, which is why it is preferred over a simple linear regulator when the input voltage is high.
When you choose a BEC, check that its input range covers your battery, that the output voltage suits your devices and that its continuous current rating is comfortably above what they draw. Servos and video transmitters can draw short bursts, so leave some headroom.
A clean supply also matters for radio equipment: a regulator with low ripple and low radio-frequency noise is less likely to interfere with a receiver or video link. Mount it away from antennas and keep the input and output wires short and twisted where you can.
Powering receivers, gyros and servos from a flight battery
Fixed-wing and multirotor builds without an ESC BEC
Separate clean supply for radio gear
5V or 6V servo systems
Replacing a failed BEC
The specifications list an input of 5.5V to 26V, a 5V/3A and 6V/3A switchable output, a ripple of 50mVp-p at 2A and 12V and a continuous current of 3A. The product title also mentions a maximum of 5A.
Set the output voltage to match your servos and receiver before you connect anything: many standard servos are happy with 5V, while some high-voltage servos need 6V.
Input: 5.5V-26V (2 to 6 cell LiPo, 5 to 18 cell NiMH)
Output: 5V/3A and 6V/3A switchable
Ripple: 50mVp-p (2A/12V)
Continuous current: 3A
Indicator: status LED
1 x Hobbywing 5V/6V 3A switch-mode UBEC
RC and drone builders who need a clean, switchable 5V or 6V supply from a 2-6S battery.
5.5V to 26V.
Switchable 5V/3A or 6V/3A.
50mVp-p at 2A and 12V.
Yes, a status LED.
2 to 6 cell LiPo or 5 to 18 cell NiMH.
One Hobbywing UBEC.
| Brand | Hobbywing |
|---|---|
| Continuous Current | 3.000000 A |
| Input Voltage | 5.5-26V |
| Output Voltage | 5V or 6V (switchable) |
| Ripple | 50 mVp-p (2A/12V) |
| Selling unit | PCS |
