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> SBEC/UBEC & Regulator > SBEC/UBEC

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HobbyKing™ HKU5 5V/5A UBEC

HobbyKing™ HKU5 5V/5A UBEC

This small and lightweight UBEC features a high efficiency switching mode BEC, providing better heat dissipation when compared to linear voltage regulation. The shielded PCB design and output EMF coil provide a stable, low noise voltage output. The HKU5 also features built-in reverse polarity protection.

Specifications:
Input: 7.2V-21V (2-5S Li-Po)
Output: 5V/5A
Dimension: 49mm*20mm*12mm (L*W*H)
Weight: 11.5g (wires included)



PRODUCT ID: 5AUBEC

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Weight: 14g
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Price  $5.75

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 Customer rated
594
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Total of 61 discussions.
Jack  1 points - 4/13/2015
 
Im trying to get an old rc car going again it uses brushed motor, analog 'esc' moved by a servo and a 7.3v ni cad battery which work my prob is I fried my rx when I plugged it in ( it uses the batt slot for power) will this work for powering it. It's over 20 years years old it's a maxxum ff by kyosho Thx
Martin  1 points - 4/12/2015
 
I want to put HKU5 5V/5A UBEC on 2s Lipo or a 3s Lipo direct to an Reciver, depend on the airplane (2 or 5 servo). So i can get 5V / 5A on my Servos. Is this usful with no Problem? Or ist a better solution? Thanks
 v_max 4963 points
this UBEC is good choice for powering servos... but switching becs are not best choice for powering RX ... I'd use separate BECs, this for servos and other one (linear one) for RX to have clean power on RX and avoid interference from power ripples of switching bec AND from servo motors.
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 Martin 1 points
Hy I fly only gliders (zagi is the smalest). Means from small glider 2 servos, 1 reciver and 1 akku. Normaly with an NiMh akku with 4.8V. Now i wil change from NiMh Akku tu Lipo Akku. My small gliders have realy no weight. if i had now to put 2 becs inside i will loose the positive effect from the lipo (weight). I need a bec or e voltage regulator, so that my servos get a normal voltage (5V) but i can use lipo's Thanks for e answer
 v_max 4963 points
if you use micro servos like 9g or smaller ones then it's total current wouldn't be too big... hmmm 2 servos and RX... what for 5A? as I can estimate 1.5-2A bec will be more then enough. This one is too big and heavy for small gliders... May be PRODUCT ID: HK-3EC01 will be better?
 Martin 1 points
Thanks for the answer. 1 Bec is for the smal gliders and the other i wil use in a 2m glider. for the big gliders (3m or biger) i will give a double voltage safty box because the wight there is not so important i need from eatch 2 pices, because my junior ist fliying gliders as well. The HK-3EC01 is out of stock. :-( Whats about: HobbyKing™* Micro UBEC 3A / 5v or TURNIGY 8-15A UBEC for Lipoly (2m glider) or Turnigy Multistar Twin Output 5/10 Amp (6-50V) SBEC for Lipoly (2m glider) I found many.. :-)
 v_max 4963 points
Micro UBEC 3A / 5v one I think is good for small gliders...... Twin output multistar seems only usefull for 4s or more power when you need 12v also to feed FPV for example.. with 2s or 3S it's senseless... And for big gliders this one will suit your needs ... 5a should be enough.
John-D  2 points - 3/15/2015
 
Mine is 52C (125 F) even when not under load. Is this normal?
 v_max 4963 points
No. this more likely means it has shortened coil inside. I'd suggest to open case in support.
BEST ANSWER CREDIT AWARDED
 John-D 2 points
You were right. Tried another one of these and it's only 35C. Attached is the faulty unit opened and measured. target=_blank>faulty unit
 v_max 4963 points
Open case in support, then. Link at top right of each page
jorgo  8 points - 2/26/2015
 
Can someone please doublecheck this statement: I can use this to connect to a 3s or 4sbattery to lower voltage for headlights operating at 4.8-6v
 v_max 4963 points
Input voltage is in range (from 2 to 5s) so 3 or 4s is OK. Output voltage is 5v DC so this match your requirement 4.8-6v. The only open question is your current (or power consumption) requirements . If required current is less then 5 amp (or in terms of power less then 25 Watt), then yes it's OK for use with your headlights.
Mar11  2693 points - 1/15/2015
 
hi can i use this to power my 5v fpv camera ?
 v_max 4963 points
If your camera has good power filter then yes. The problem is that's this is SWITCHING BEC which provide not well fitered power with HF frequency ripples which path-through to video. For camera, I'd recommend to use LINEAR BEC ... and hardly you need more then 1A ... so linear one is preferable for camera feeding
BEST ANSWER CREDIT AWARDED
 Patrik 68 points
Is it possible to maybe add a small capacitor which will smooth out the frequency ripples?
 v_max 4963 points
you can add low path filter.. ( LC filter) but what the sense? simple linear bec for current under 1A will be lighter and better. Simple 7805 regulator chip and small capacitor will do job better...
 Mar11 2693 points
hi vmax can you recomend a good linear bec ?
 v_max 4963 points
Most ESCs with BEC has linear 5v bec 1A build-in... So if you have ESC, then you can use ESC bec output for feeding your FPV camera... On multicopters you always have unused ubecs in escs...why not to use what you already have... If not then ....single chip LM7805 and 33-100uF capacitor will do the same... Unfortunately HK do not offer separate linear BECs, as well as most other suppliers too.
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SITAS
12 likes
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Verry small and cheap. Thanks hobbyking.


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Rusty Nuts
109 likes
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Purchased three of these for ignition voltage regulator duty in my large scale gas planes, when paired up with the turnigy 2100 Lipo receiver pack, you can run an engine all day versus the 4 cell NiMH packs. Working great in my planes, the 3A version works great too, but is a little longer and slightly heavier, but cost less. Next order, I will order more for spares for future projects.


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gianhulk
39 likes
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Really good, light and useful for no esc bec.


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91 likes
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Extra safety in your hobby


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nesperatu
96 likes
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ubec very small, but is doing its job


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