HobbyKing Online R/C Hobby Store : HXT UBEC 5/6v output, 5.5~23v Input

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8/25/2010
Camboui (-10%)
What's the verified efficiency ? Thanks.

7/29/2010
narue@gmail.com (62%)
tenho usado esse produto e comigo nao apresentou falhas, uso uma lipo de 3s no meu aviao glow!! recomendo!!!

Sergio Alas (34%)
Em quantos servos usas? vou por em 1 treiner e em um cessna, ambos com 5 servos!

6/29/2010
maffi (63%)
question: using an ESC to run a motor and in the same time UBEC for receiver to a certain point I will run out power on the battery lipos. Does the Ubec garantie the voltage necessary for the receicer stopping to feed the motor at a certain voltage?

gouldie (63%)
you got to remember if you use the same battery to power the esc and ubec and voltage doe get low then the esc lvc will come on any way. and i use one of these ubecs with a separate battery, only a 1300mah 7.4 lipo and i get about 3-4 hours worth of use out of the battery before needing to charge it. so i dont think the ubec or servos really use much power compared to a motor

Mustafa (66%)
A ubec does not save your receiver power, your ESC does. The ESC cuts the power to the engine when the voltage is too low to save energy for the receiver.

5/15/2010
Fireflynj (70%)
does this UBEC has any Lipo safety to protect source voltage from dropping below 3volts per cell?

pippo65 (18%)
no,but I'm not sure of this, I believe it's only simply ubec. I use my esc for this safety function...

surfdabbler (43%)
No, there is no protection. I've accidentally run a 2S LiPo down to 2V leaving it connected overnight. You should get one of the cheap little LiPo buzzers if you are worried. I'll be getting some of those in my next order.

pimpmycnc (32%)
This one is made for 2-5S lipo, so it's save to your accu packs.

Watze (54%)
No, there is not, you don't want your receiver stops working while flying. your esc has a cutt-off or soft cutt-off.

Dean (32%)
No, this is just a UBEC. You will need a separate Low Voltage Cut-off to protect your cells if your ESC does not have one built-in.

Eric1180 (-53%)
Not it doesn't. Matter of fact if you leave a lipo directly connected to the UBEC it will discharge the lipo slowly in about a week or 2. So remember to either attach a switch in between the LipoUBEC or never leave the lipo connected to the UBEC

4/6/2010
mykro (22%)
I'm going to be using the sentry 40amp ESC with this BEC in my FPV Easystar. I'll have 6 servos to power.. elevator,rudder left-right ailerons, pan and tilt camera servos.. I assume this BEC will do fine?? ... Anyone??

Dangaras (51%)
At 5V/3A you will be replicating the ESC UBEC capability. The questions are what is the battery voltage you plan to run with, motor type/current draw and total current draw. The ESC will be warm from running the motor, if you add the servos and camera you will contribute to the heating. Servo size, type and quality matter also. The HXT900 are famouse for drawing 500mA in a stall position, where as digital servos pull more current than analog.

You are probably on the edge and will have no issues with the ESC, but to be on the safe side, the UBEC costs less than a new model.

bassman2914 (61%)
I use this on a stunt plane with 4 high torque high current draw servos and haven't had a problem. Since this plane is not going to have extreme throws with large control surfaces it should be just fine. Moving a camera should barely stain a servo and the flaps are only down while you're going slow and barley moving control surfaces. You should buy it, it's cheap and I'm sure it with have enough power.

Sfakias (35%)
Hi! I am using this UBEC in a homemade AP platform. It provides power to eight (8) 9g HXT servos, a 6EX Futaba reciever and a HK 6 channel 2.4 Ghz reciever. Never had a problem with it!

surfdabbler (43%)
Provided you are just using normal servos, I'd expect this 3A UBEC is sufficient. I have one driving 18 servos in a 6-legged walking robotics project, and it seems to be coping quite well.

Eric1180 (-53%)
O David was it the Hexapod or ?? i forgot the name.. Did it have a LEXAN body and aluminum servo mounts?

pee69wee (30%)
Have almost the same setup with my FPV EZ* works fine* becomes not even hot.

rotorvator (55%)
God speed mykro!!

2/24/2010
Tryin2fly (55%)
Would this handle 6-8 hxt900 servos on a 3300 5-cell if not can anyone tell me what one I should look for I really need some help on this one!

bassman2914 (61%)
Those are low powered servos but still might draw a bit of power.I wouldn't trust it with 8. It'd probably work with Turnigy 5A (8-26v) SBEC for Lipo even better and doesn't really cost less. That should work fine but TURNIGY 8-15A UBEC for Lipoly, no chance of over loading and not too much bigger, heavier or more expensive. all depends on your budget.

12/6/2009
WILY27 (44%)
You could use this UBEC for a 500mla 30c 2s lipo of 7.2 V to me a constant 6v output?
would be to use a receiver and servos nitro car not larger than the output 6v lipo

hellboy (31%)
I cant connect my flightmax battery to my ubec.
DO i have to buy the JST-XH to connect it.
I don't wish to cut the wire out...
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9924
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9915
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9732

bassman2914 (61%)
It would work fine as long as your lipo stays above 6v when heavily strained. might be hoping for too much but it should keep 5v if that is selected.

surfdabbler (43%)
I've used this with a 2s LiPo as the supply, with 6V output, and it works Ok for most of the charge cycle, although the 6V supply will drop off as the LiPo comes to the end of the discharge cycle.

10/15/2009
Edsel (43%)
Hi, this ubec can suply 2 BLS452 Futaba? torque 14 kg/cm2 speed 0,14 sec/60 at 6v).

9/11/2009
Yesyns (27%)
any picture to show how this UBEC connect to ESC, battery and receiver? So let everybody clear.

Yesyns (27%)
Hope the pic can be seen clearly.

Yesyns (27%)
Ok just find the picture at this address: UBEC FIGURE

Tryin2fly (55%)
you have to connect to the bal port on the batt
if I was looking at it right ?(makes sense to me now )what if you run 2 paks (parallel)still only hook up to one, also if the esc has a bec you just disconnect the red wire ?just want to be clear dont want to cook anything Thanks!

bassman2914 (61%)
take the thicker wires, connect the red one to the red thick one on your esc. Big black one to the black one on the esc. Plug the wire with the black connector into your receiver's battery slot or any other not used slot. if it doesn't get power plug it in the other way.

Yesyns (27%)
Connect Red to red, Black to black wire from battery to UBEC. In the picture there are white red and black dot represent the pins connection to ubec. So only white wire to be connected from receiver to the ESC, or just pull out the red wire from the ESC (unuse the red wire).

9/8/2009
jacky_ong (47%)
well, can i use this as a valtage regulator for my 26cc petrol plane RECEIVER. i Planning to run on 2S lipo. But 7.4v will cause me to burn the servo. IS This the correct accessories to use ? thanks

Irrwitz (95%)
Yes, its the right sing to reduce the Voltage to 5 or 6 V. Put it between Lipo and Receiver, it works fine.

7/25/2009
BenAng (38%)
Do I need two lipo to power this?1 for ESC and one for UBEC)

Deano (69%)
you can re-solder the power leads of the ESC and BEC to go into the one battery.

bassman2914 (61%)
nope, just solder the input wires of ubec to input wires on esc of same color.

7/24/2009
kerrylaw7307 (54%)
I have a plane that has a 50AMP ESC without a BEC. I bought this UBEC to power the receiver. Question..... Can I power this UBEC from my 11.1VDC lipoly flight pack? Would this work?

Would this not be the same as if I had a 50AMP ESC with BEC?

Deano (69%)
Yes you can, and yes it would be the same.

bassman2914 (61%)
It's the same thing it just allows you to get the power requirement you need for your receiver and servos without paying extra for a pre built in one that never has enough current output.

Napstr (86%)
Yep you can connect them to the same battery supply and it is a similar situation to the built in bec although this way has big advantages. These external BEC are switch mode which gives greater efficiency and lower heat than the linear BEC's they put into ESC's. The reason they use linear bec's in ESC's is the Switch mode by it's switching to manage the output would cause interference with the switching being done in the ESC itself to control the motor hence the normal BEC installed with an ESC is a linear esc. A linear ESC acts more like a resister to drop the voltage for output - therefore any extra voltage put in is lost as heat and this heat can cause issues with the heat generated by the ESC associated with the large amp draw going through. Having the two as seperate items is very beneficial as the two can operate independantlty of each other and will not interfere or heat up each other. Also these BEC's being switch mode run cooler and alot more efficiently (around 90%) as they convert power (watts) in to power out so 4 amps output load (from the reciever and servos) only draws around 2 Amps from your 3S lipo.

7/13/2009
nizamk (75%)
1. How do you connect a 3 cell Lipo?
2. What is the max discharge LiPo battery that can be used?
3. If I have a 1000mAH 10C Lipo, how long can I use the battery?

stgram12 (42%)
You just connect the 2 main leads(black and red) of the battery or the 1rs and the last lead from the balance socket(be careful they might not handle big current!) to the 2 input leads of the BEC.It doesnt matter if it is 2S,3S,4S,5S, as this bec can handle all those types of voltage!

As this will suply 3A 5/6V the max current drawn from the lipo will be max 3A. So you can power this even from ordinary AA batteries!Of course you can youse all types of lipo, which can provide at least 3A for the bec.But dont forget the motor which actually drowns the battery much more then that bec!

A 1Ah 10C lipo can supply 10Amps.So if you are going to use that bec on its full capacity you can connect a motor which will require a max of 7Amps continuously.

I know i love to write a lot, hope I answered your questions! :)

6/28/2009
paakjel@online. (55%)
Can i put this between the ESC and the RX to make the 23v from the 5s lipo thats is connected to the ESC lower ( 5v) so i can use the servos from the 5s ?

Coma004 (81%)
Yes, you can power this ubec with your 5s lipo.

6/10/2009
Edsel (43%)
Excelente regulador de tens�o. Recomendo, utilizo para utiliza��o em meus receptores.

5/28/2009
Ron Smetsers (72%)
I still fly on 35mhz, and my servo's are jittering quite severe when i walk away 10feet with collapsed antenna.
When i pull the antenna, the jitter is gone, but i'm not sure about taking it to the air.
What can i do? (exept buy FASST)

3900Kv (62%)
1)Fly with antenna fully out.
2)If there is some glitching as well you can try cleaning the pots.
3)You can use a UBEC to sort any power issues with servos but do use a ferrite ring on power wire to Rx.
That should help.

gicy1 (84%)
J'ai le mme problme sur 72 mgahertz es-que ont retrouvent ce problme sur le 2.4

5/17/2009
mamba (55%)
ok, don't ask me how I found out...this UBEC is not protected for reverse plug power.
happened to someone?
did you manage to fix it?
what did you replace in order to fix it?

Afiza (100%)
hi.. how do u know that the UBEC is damaged by the reverse polarity? i ordered 3 units and 1 unit appears to be defective. the servos are jittering when when ever there is input by the transmitter. the green light is still ON. tks for ur reply..

Richard_s (68%)
I still dont understand where should I connect It. To any free channel and use ESC on throttle channel? My guess is - ESC and BEC via Y cable to the battery, and then I would pull off white(signal) wire from ESC`s receiver plug and put it to BEC`s black connector. Then plug it to receiver throttle channel. This way I would supply RX and servos with BEC power, ESC + BEC with raw battery power and throttle signal from RX at the same time. Would this work? I plan to use 6 - 8 servos on my plane, I think I cannot without BEC :)

William (54%)
Easier way is to ,yes connect BEC to any open channel and ,Yes connect ESC to throttle, BUT disconnect red lead from ESC to receiver and heat-srink so it doesn't short.

sirpa (34%)
Is this Ok for 6 S ?

it says 5s only but 23V ???

MIDNIGHT FLYER (74%)
Mines on a 6s. 25v fully charged. Seems fine with over a dozen flights.

shayne (48%)
What is the default setting?? Mine came with the jumper in the same position as the one in the photo above. What V rating is this at? What jumper setting is what...5/6V????

waynemia (74%)
The picture shows it in the 6V position. Just pull the jumper off and move it over one pin to slect 5V.

3900Kv (62%)
Default is 6V position but measures at 6.47V. To switch to 5V just move the jumper to other free pin.

Deano (69%)
leave it a 6v, it gives more power to the servo motors which provides better speed and more torque.

piruja (90%)
Thanks Davide, do you know if exists any plug that allows that without peel the cables (an special two to one plug, two ESC **> one batery?

Gary (50%)
yes. you can make(or buy) what is basically a "y" cable. Like this one ***********hobbycity****/hobbycity/store/uh_viewItem.asp?idProduct=2155&Product_Name=HXT_T-Connector_Parallel_Pack_lead but with the male and female plugs reversed.

piruja (90%)
may you help me with the lay out of the connections? I mean between the UBEC and the ESC, battery and reciver. Thanks

davide (87%)
The black plug has to be connected to the receiver (any free channel is ok) for the power suppyof receiver and servos.
You can cut the red jst plug and connect the red and the black cables together with the ones of the esc to the Battery.

rmartignoni (44%)
Is it enought to power 5x 3004 futaba servos?

Deryn (87%)
Do you know the current draw of the 3004 under load?

The UBEC has an output of 3A.
As long as the max current draw is 600mA (.6A) or less, it will be fine.

rmartignoni (44%)
I'm planning to use it with a 2S 1300mah LiPo in a 3D plane. Do you think it would be fine?

Kyle (67%)
3004's in a 3d plane????? wow, but it should work yes.

waynemia (74%)
Hi, put a servo on a servo tester and measure the current under load. Measure the reciever current. Add receiver current plus 5x the servo current. Multiply the total by 1.2 (20% savety margin). If it is less than 3A, you are good to go.

Eseck90 (92%)
Can this ubec be programmed? How?

Deryn (87%)
It has a switch to choose output - 5v or 6v. That is the only thing you can change.

waynemia (74%)
Just a jumper. The blue squate in the picture. It is not really tight. I would juggest a little hot glue to make sure it stays put.

Eagle (74%)
Is this a linear-mode BEC oder Switch-mode BEC ???
Best Reagards!

Deryn (87%)
I assume it is a switching BEC. De******ion says it is good up to 5S and states a 3a output.

waynemia (74%)
It is a switching unit.

Christian (50%)
Are there some auto-cut off on this UBEC, if the batteries are very low (under 6,5V)
?

Deryn (87%)
UBECs do not have a cut-off.

waynemia (74%)
This is good since you don't want the radio receiver to stop.

regfefgerfer (100%)
What is the weight of this unit?

waynemia (74%)
No, it is .5oz, 14gr

3900Kv (62%)
I measured it at 12g with my house hold scale.

stgram12 (42%)
Ok. why are you arguing for 2grams?I dont think that any plane would fall from the sky only because it is 2grams hevier!!

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