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> SBEC/UBEC & Regulator > SBEC/UBEC


TURNIGY 3A UBEC w/ Noise Reduction

TURNIGY 3A UBEC w/ Noise Reduction
TURNIGY 3A UBEC w/ Noise Reduction

The TURNIGY 3A UBEC utilises switching technology to gain a much higher efficiency than a linear BEC, this means less heat and longer battery life. The UBEC is equiped with a noise reduction alloy housing to reduce noise even further. Incorrect polarity safety feature ensures the UBEC will not be destroyed should the battery be connected incorrectly.

• Over current and over heat protection.
• Switching frequency 300khz.
• 92% chip efficiency
• Noise reduction alloy housing

Output: 5v/3A or 6v/3A (selectable)
Noise: <50mVp-p(@2A/12v)
Input: 5.5v-23v (2-5S Lipo pack, 5-15cells NiMh)
Size: 41.6x16.6x7.0mm
Weight: 7.5g


Weight: 35g
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Price  $4.76

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 Customer rated
Total of 144 discussions.
gary  2 points - 11/2/2015
how do you select the output voltage? does it come set up as 5v or 6v ?
 Martin 5 points
There is a 5V / 6V jumper.
 handyjap 714 points
In the red circle is the black cap that have to be moved between 5.25V and 6V (in my case) target=_blank>In red circle
DooGZ  78 points - 10/3/2015
5 years and counting... alive and kicking
MedicineMan  11 points - 8/17/2015
Can i run 2 of these in parallel for redundency or will it damage the ubec? (i.e. both running off the same lipo and connected to a single receiver)
 Wazza_99 1265 points
Never do this with a switching bec, which this one is. You can get away usually with linear becs.
 MedicineMan 11 points
What if I put diodes on the positive output pins on the becs?
 handyjap 714 points
That should do the trick, but take into account the voltage drop over the diodes which vary with current up to 0.7V. If it is multiple items I drive, like several servos, I prefer to split the circuit for supplying power to the different servos separately.
 kalli 28 points
use a diode and place the jumper on the 6V pins and you will get your redundant /- 5V.
 Akshat 120 points
But at the same time you will lose load regulation !
alessandro  1 points - 8/7/2015
Hello. I read your forum but I did not understand that you intend to UBEC and SBEC. Which of these is linear, which is switching? Why you have not BEC. The "TURNIGY 3A UBEC w / Noise Reduction" is fine with lead batteries AGM? Or it is good only with LiPo?
 handyjap 714 points
This is a switching regulator = SBEC. This regulator is good for any battery between 5.5V~23V. The ones I have select between 5.25V and 6V. Just make sure you have some form of battery monitor not to drain the battery completely as it is not build into this device. The advantages of switch mode regulators are that the waste much less energy during conversion and the disadvantage is that when overloaded they tend to "fold" to 0V for own preservation.
 alessandro 1 points
Thanks for the reply. Engineers Hobbies king they have also explained what they mean by UBEC. I would still like to know what BEC is better to use for lead batteries AGM. And if one of the products of the Hobby King is someone who makes my case. The battery is 6 volts DC therefore, I believe that even a linear type can be fine.
Ramiro  2 points - 7/18/2015
Customer Reviews
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Overall Rating
320 thumbs up!
Very tiny module. I was expecting a little bigger... It came in transparent shrink wrap.

The output wire has a JR battery terminal.
The input terminal has no connectors attached, so you can attach the connect of your choice.

Actually weights 8gms

I am using 5 Futaba 3004 servs without any problems. IT barely gets warm.

Suggest to keep a min 10cm distance form the reciever to avoid interference.

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Overall Rating
Hannes Steets
61 thumbs up!
I checked this UBEC on a spectrum analyser to see wether it put out lots of interference in the 35 MHz radio frequency band. There is some switching noise between 100 Khz and about 2 Mhz, which is to be expected as this is the main switching frequency and the harmonics of it. I was able to lower the noise by winding 2 extra turns of cable on the ferrite core. If you want it REALLY quiet, you can solder a small 4,7 uF Tantalum capacitor between the red and the black cable. Mine fits nicely inside the ferrite ring. But I guess these alterations reflect just my tendency to perfectionism. It would be interesting to do some comparative range testing with this UBEC vs. a receiver battery. Maybe when the wether gets warmer...

4 comments. Reply..

Overall Rating
27 thumbs up!
Very BAD PRODUCT.. The Cable is so Thin..!! i bought 1 of these and tested to my Turnigy Lipo 1300mah, than the Cable BURNING..!!

25 comments. Reply..

Overall Rating
25 thumbs up!
Poor quality. Have after some tests sometimes no output voltage. Just one time is to mutch. Thank god, i don`t have crashed my full glass EP-warbird with this BEC. I took another BEC.

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Overall Rating
23 thumbs up!
Dont agree that this is photographed and labeled, 5A UBEC but when you get it, the instructions state 3 amps. Labeling a device that says UBEC - 5A but not stating 5A amps for 10sec is not right. It's rating is 3 Amps Constant, so it sould be labeled as shuch. I purchaed 2 of these thinking that I got nice small UBEC running at 5 amnps.. Wrong!!!

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