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Features. Over current and over heat protection. Switching frequency 300khz. Chip Efficiency is 92%. This UBEC utilises switching technology to gain a much higher efficiency than liniar BEC. Which 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.
Not* this is an original UBEC. There is now a cloned version on the market, it is slightly cheaper but reliability may not be as good, find it here:HKUBEC3A
Dear Bugsmasher, you can use a 2 cell LIFE all right. The output will be the same whatever the input is. But usually it is not necessary, since LIFE's voltage is within safe range for receivers and servos in most aplications. So perhaps you could be more specific about your's so we can help you out ok. Cheers!
I already use 6.6 LiFe without a bec for my receiver and servos but I want to put a bec on it to power the electronic ignition on a gasoline engine. I don't want to put more than 6 volts on the ignition.
This BEC will accept a potential of max.23 volt,
either it is given by Life, Lipo or Nimh,
it will convert it to your selected 5-6 volt,
and power the receiver.So no woory about type just stick to potential, should not exceed 23 volt and must be enough to power your electronics
I have a 60 size warbird with standard servos and HK514 electric retracts and use a 4.8 NIMH receiver pack. I want to go to the LiFe for power but want to keep a 5v supply and saw this. Is this what I am looking for? Those HK retracts I am told do not like 6 volts!
Thanks Mike
Yes this is all you would need to supply the voltage you are looking for. What mah pack are you using now, you might consider upping it to help with the extra power needed for the retracts.
If you have the two ubec's hooked up in Parrel and they are not matched you will have amp spikes and one ubec could caus the other problems so it is better to use a high amp rated ubec vs two lower ones.
Even if it is the same model they could be off in power output which could cause more problems vs getting a single higher rated ubec for your application. MPO
do i still need this on a fpv raptor if im running a hobbywing 40ampesc w/sbec 5amp in it already or do i still want to run this one instead? i am using 4 digital 11gram servos the motor is stock requires only 30amps advise please thanks. tommy
you should be fine without using this in the way you are setup at the moment. The only way you would use this item is if you were afrade of your esc burning out and losing your control surfaces.
somone said anytime you run 4 or more digital servos not analog you should run an external but if i do then i wont have the best effitientcy for the motor anymor because you have to cut the middle esc wire to add this. so do you feel this way for digital servos as well?
It would all depend on the type of flying you intend to do. If you intend to do 3D I would use the external bec, for fun fly you could stay with the built in bec.
Cutting/ disabling the pos on the esc will not hurt the efficency at all.
im going to use it simply because it is also my fpv plane and if it will not hurt efficientcy thats all i need to know i just have to mount it thanks. it going to carry alot the fat shark and the arkbird now i just hve to fit it all.lol hope the arkbird set up goes smooth and easy. i throw a video as soon as i make one in it.
UBEC vs SBEC vs ESC vs ???
It would be really helpful if Hobby King (HK) or the first person to comment would add a short description of the acronym, what it means and what the item is/does and if it is intended for planes/helis/cars/boat or all of the above!
Intended for all of the above. This is simply another way to provide power to the Rx. Basic setups use the ESC to power the Motor and the Servos. If the ESC fries, you lose power to everything. This UBEC helps to take power directly from the battery to the Rx. Now, if the ESC fries, you can still control the servos even though you've lost the motor. Even if the ESC has a BEC, you can use this instead. Why? Let's say the ESC BEC peaks with 2A at 5V. This may be too low an amperage for 6 servos.. or you may be using 6V servos, etc.. Look up "UBEC install" in Google Images and you'll see the basic wiring.
Thks for your replies. I use various receivers, Orange Fasst, Corona GR8D (2.4G), Corona RP4S1 and others. I instal the servo winch in boats that I build and it was just important to get a little more power and speed out of these. I will certainly try to use the bec in line. I must try to find out which Rx have built in regulators.
Joe why would you need to power the servo threw the bec? Will the Rx not supply you with the 6v you need , and how will you control the servo if powered threw the bec vs the RX.
You can power the servo yet am having a hard time seeing how you would be able to use in that configuration.
Thank you for the reply. The 7.2v goes straight into the Rx which powers the winch servo ( I want 7.2v to the winch servo for more power and speed) BUT the second servo can only handle 6v. I was thinking of putting the bec between the Rx and the servo by using the two power wires as is and running a third signal wire between the Rx and servo, bypassing the bec. I will have to put three wire plugs on both ends of the bec with the signal wire bypassing the bec. Has anyone tried this?
You can add a 0.5w resistor to the second (6v) servo lead to drop voltage from 7.4v to a safe 6v. Ask at your local electronics supplier for correct ohm resistor. This would be the simplest and neatest setup
Will this device put out 3A for sure? Or does it simply have the capacity to put out 3A if it has 3A input?
If I input from a 2A lipo, will it put out a max of 2A? Or does it take input and amp it up to 3A?
Will increase the aperage.
Remember motoes draw high amps and if you are using a 2ah battery you can draw 30A from it yet the power supply will not last long before the battery is dead.
Also it is changing voltage limit for you as well.
so with it reducing the voltage from the battery it is able to give a more constant amp feed.
I am using it to replace a 6V/2A wall adapater. The device wants 2A. If it "asks" for 2A from the BEC, will the BEC give it 2A, or force it 3A?
Sorry for weak question ** I need to learn.
Thanks!
what you want the ubec to give you it will.
it is rated at a 3A constant and 5A short burst so if you only need the 2A out of it as a constant you will be fine.
It will give you all the power you are asking it to deliver.
the bec will deliver 3A at 6V provided the power source (battery) is able to deliver more than 18 W power (6x3), say 20W taking into account internal losses in the BEC, and its tension is more than 6V.
I have a crius aiop v2 with extend board, futaba r2008sb rx, and a camera gimbal with two digital servos. I am using this ubec connected to the flight controller and that in turn powers the rx. The problem I have is I'm running 30amp opto speed controllers and they don't have a bec. The crius aiop requires one of the bec"s to be installed or the servos will not work for the camera gimbal. can I pigtail this ubec and also plug it into the flight controller to replace the missing bec from the speed controller. Or will it overload the ubec.
Its Just A Preferance I can tell if i got power by the RX led & The Servo's centering I Dont Need and Unnessesary power drains I Was Just Telling people How to do It Duh
This is a great UBEC Output Volts On 6V Setting Is 5.98 To 6v Right On The money The Only Thing I Didnt Like Is The Red Led That Lights Up When Powered up it Pulled total Mah 0.13 Mah I Removed The Led By Simplely Breaking the led off board with small srcew driver Current Draw Went Down To 0.7 Mah
the way you have tiped your numbers the draw has gone up not down 0.7mah is larger than 0.13mah.
I beleive you ment to put an 0.07mah as the draw without the led.
torque and size of the servo is not that important* you should check the amps it could draw when it is charged at 100%.
Think about the fact you'll be operating with different servos at the same time... BUT... it is quite unlikely that you'll be using both servos at the same time at their maximum (100%) charge....
it is a matter of calculation and guessing. If you're unsure you'll take the megabec of 8 amps. I use it in 2 tow-planes with 9 servos of 6kg and 12kg servos... never had a single issue
I use 26AWG servo cable (AM2001-15x10 **>cut off the white cable) as an extension from BEC to Receiver, and 18AWG (B18A150-08) as an extension from BEC to Battery. You could use the 26AWG for both extensions, as currents involved are pretty low.
Yes should be fine. FYI
Current consumption of HXT900 is from 6mA to 600mA, 6mA at no load, 600mA servo is blocked.
If all 7 were full load (stalled) that's 4.2 amps.
You really should test thou. I have 7 9g servos in my durafly t-28 and use one of these without issues.
would be almost impossible to load all 7 servos full load (and this bec can do that fir short burst). If your plane or heli is loading all 7 full load , your bec will not be stopping the plane crashing...
I use a separate 2S battery for servos etc, a 3S for Video Tx and a 4S for the motor. The 2S and 3S can be very small as servos and VTx don't really consume much. I have a 800mAh 2S that moves 5 standard servos and lasts well over 30 mins. Anyway, you could give it a try as a cheap and easy solution. Beware that voltage won't be regulated, ie you d start with 8.4V (or 7.6 if you put one diode) and end with lower volts but I doubt you d notice any difference...
I have to power my 2 servos for my gimbal on my quadcopter. I have a 4S 5Ah for the motors and a 3S 0,5Ah for the fpv gear. I have no more place to put a 2S lipo on my drone, even a little. So I have to find a low RF noise UBEC with a 7,4v output or another solution :/
It should be, however, if you mean simply standard size digital servo's then I would raise an eyebrow....if it turned out to be a 3D model I would so upgrade to a higher output.
4 x HS-485HB's in a Sport Flyer would be no problem but with regard your second set 6 servo up, although this unit probably would manage, I would be tempted to give yourself a little more margin, for instance this www.link
indeed it will be ok... you're not likely going to reach that 3amp during flight. To be a 100% sure you just add all the max-amps of your servos and compare it with the amount the bac can deliver.
keeping in mind that you're not likely going to use the max-amp at all time at all your servos at once :-) ... or you would have made a design-mistake while building your plane :-)
Hi, does anybody knows what cut off voltage for li-po and NiMh? I want use this with 2S LiFepo4 so I need cut off voltage 4-5V (5 NiMh or 2 Lipo).
Can I now what acc. type choose this ubec by auto?
May be there are other ubec - specially for lifepo4?
Ü*BECs do not have a cut off function. It is for powering Your receiver and if it would cut off the power it would cause a crash. You got to make shure Your battery has enough capacity. Chek it out by use and recharge. The battery-charger will show You how much the consumption was. Never use old batteries to power a receivers!
for lights how does that work? acually mean how do you hook them up staght to a seperate battery or through the planes battery or esc or? i just got a bunch of lights so if theres a better way i would sure appericiate some advice. thanks tommy
for lights it is used to power a seperate channel that is operated by a remote on/off switch.
Think of it as a landing gear toggle switch on the tx. servo moves a second on off switch which has the power from the main battery going threw the ubec to the light sourse that is a lower voltage than the main battery.
can i use it to power my fat shark tx on the plane so it would absorb some heat from it so the tx wont get so hot? and hopfully help with tx signals to not bother eachother is that right?
impossable to power a TX with it . you mean RX and if you power the light system with it you can take the power from your motor power battery.
yor speed control will have the main power yet you can power other items threw it. Make sure you have your voltage cut off set on the speed control as to not lose power to the RX
Hi,
I turn my lights not with RC because I drive one Turn with Lights or without Lights. My interior light is also always on or Off.
If yout want to switch in a turn you need da Relai
So I installed a normal switch for any other need
UBEC has advantage that should the ESC fail, you will still have power to your reciever....after that, they tend to be used as a substitute for ESC/BEC when you have a high servo count or are maybe using 4 or more Digital servo's, etc.
There is no need to buy a seperate UBEC if there is a BEC in your ESC. the only difference is "U" which stands for Unintrupted Battery eliminator Circuit, both work the same.I hope this helps pls award
The two main leads will tap into your flight pack and that will power up the regulator. Then you plug in the rx lead to the rx to give it the regulated voltage, it will regulate it to 5 or 6 volts depending on where you put the blue jumper.
Just remove the middle red wire from the Rx connector of the ESC and connect it to the Receiver, and connect the rx connector of the BEC in batt/bind channel of receciver. Hope this helps
3.1 Non-BEC Built-in ESC connections:
Simply parallel the 2.5A UBEC input wires with the ESC power input, or direct connect
the 2.5A UBEC input to a battery pack. Plug the 2.5A UBEC output wire to any spare
channel of the RC receiver.
3.2 BEC Built-in ESC connections
same as the 3.1, except the centre pin (the ESC built-in BEC 7.2V output, normally in
red) of the ESC signal wire has to be disconnected or cut. if you feel this has helped you only then give credit. tommy
so you know all credit comes from hobby king not your account. if your not willing to folloew through on the credits please dont ask any questions. give somone credit for the correct answers. please thanks ,tommy
I have a couple car ESCs that don't have BEC, and my receivers do not have BEC either. Do I plug the RX lead from the ESC into this, then plug this into the receiver?
You have to tap this into the main power supply with the thicker black/red cables. Then plug the rx lead into the rx and it will power the rx and servos.
Thanks. These are the cheaper Tamiya ESCs with separate leads to the battery slot of the receiver, and that puts out full voltage, so I assume it would be OK use those?
I dont know too much about cars.... but these are fine in small/ medium planes with 3-4 servos, so a car should be fine, especially elect with only one steering servo
This will mean 3amps continuous use but will handle a surge of up to 5amps for a short period,continuous 5amp draw will see the unit getting very hot or worse!!
Thanks for answers guys. What about 'SBEC-26V' which is almost same price with this. It said 5A on spec but Max5A on the picture like this TR-UBEC. Is it 5amps continuous?
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
likes
Value
UNRATED
Quality
UNRATED
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...
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Overall Rating
Jessy
97 likes
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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..!!
21 comments. Reply..
Overall Rating
depronator
76 likes
Value
UNRATED
Quality
UNRATED
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.
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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