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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 Quantity: 
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stock
10+
Price$5.33


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 Customer rated
591
crowns
  
 
Total of 44 discussions.
Jose M  1 points - 3/16/2014
 
BuddyCode 760C7A2C-3C81-48DF-8FBA-49D9DE1F2727 UBEC 5V/5A
balrog  3 points - 2/25/2014
 
To say that the switching BEC provides better heat dissipation than linear is not knowing what youŕ*e talking about and is confusing, please fix the product description. A switching regulator generates less heat than a linear regulator, but heat dissipation happens afterwards and it doesn't matter what regluator it is, the radiator matters. There's just less heat to dissipate.
 Jimbolina1 476 points
Hello balrog. I think you might be confused a bit. The advantage of useing a seperate bec apart from one built into an ESC is two fold. One is if your esc burns out you will still have flight control and second by dissableing the ESC's built in linier bec you are reducing the overall load on said esc making it run cooler. The newer opto type ESC's with built in bec avoid this issue all together and would be my recomendation for anyone looking for an all in one unit.
 RattleSnake 500 points
Jimbolina1 : You are the confused one. Optio ESc's don't have bec's... at all.
Brandon  11 points - 2/8/2014
 
77E9DB7F-C8DF-4679-92B3-4B8E8ED9E21A Buddy Code!
glassair  10 points - 11/19/2013
 
It is just hot even without current draw. Heating behaviour is definitely worse than my other linear BEC. My usage was 4pcs of 12g of analogue mini servo. I think level of current consumption is not high to make big load on this UBEC. Even in case of hot condition, voltage output looks good. My guess is one of this twins UBEC maybe faulty. I will put two thermocouple on each unit and check the temperature differences. Those measuremrnt pictures will be sent to CS for claim.
 Jimbolina1 476 points
Be sure that none of your servos are binding and are centering. A servo trying to center constantly or getting stuck will cause this issue.
 Jimbolina1 476 points
Agreed waterlogged. A single servo even in bind conditions should not cause this alone but if one malfunctioning servo is drawing half the amp load than it is very possible to completely overload it with the additional servos. I do agree it seems that he has a malfunctioning unit. I was just throwing out something that should be considered and checked before tossing the UBC.
 Jimbolina1 476 points
I do the same. Always good to have replacements on hand. I am a bit dissapointed with the problems indicated here. Seems this is the updated version of the UBEC I have stocked up on (the HKUS 5amp 5 volt) I have had great success with this one. I run 5 9g and 1 13g servo with it in my old eflite p38 for several years now without a hitch. Never a fail in any of the 12 planes I use it in.Happy Landings.
 glassair 10 points
Thank you so much for all of your opinion 'No current draw' means No Connection of any number of servo. Again! Heating is always presented regardless of current consumption. 1 faulty UBEC among thousnads normal one can make crash. I am NOT fortune guy among thousnads people. But HK & supplier of this products keep the mind of Reliability. And other RC pilot who is interested in this UBEC can be shared by my experience. I will make some temp. measurement picture and share it.
 glassair 10 points
Thanks for your comment, waterlogged. Actually some pictures are mainly for people in CS. This faulty device case became a lessons-learn for me. More carefull check-up when I put new devices into my plane is necessary. I wish your FUN & SAFE flight! :)
glassair  10 points - 11/18/2013
 
My one is too hot when I just put 3s. I think such a hot condition is absolutely not normal in switching BEC. Actually I faced 2 times of crash with this UBEC. Do you know why too hot? And how to fix it?
 v_max 2995 points
The problem might be short circuit in coil.
BEST ANSWER CREDIT AWARDED
 glassair 10 points
Thank you for your feedback v_max! I think you may know the internal construction of this UBEC. This is the two peices of ubec with parallel combine for increasing current capacity. Thats the reason why it is too thick. I will separate it and compare it. If one of them is extraordinary hot, I will try to exchange the coil unit (inside hexagonal black case...right?) at first.
 Prickle 80 points
What are you powering with it?
 glassair 10 points
Sorry... I made a mistake to write a reply on Top... I created new question... please find it above.
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SITAS
12 likes
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Verry small and cheap. Thanks hobbyking.


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Rusty Nuts
107 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
34 likes
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Really good, light and useful for no esc bec.


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88 likes
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Extra safety in your hobby


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


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