KISS 18A ESC has been one of the most popular ESCs, they are light weight (2g excluding cables) and perform exceptionally well thanks to the higher signal update rates. However I have not personally tried KISS ESC, due to their high price point and frequent incidences of catching fire.
Finally DYS has released a similar size/weight ESC that is much cheaper (at $11), yet able to run BLHeli firmware and have oneshot / damping light supported.
This ESC is tiny compared to other regular 20A ESCs.
- Current: 20A
- Peak Current: 22A
- PWM output rate: 18KHz
- Signal refersh rate: 20-500Hz
- Outout PWM frequency: 18KHz
- App program: SimonK
- Battery: 2-4S
- BEC: NO
- Battery: 2 – 4S
- Size: 23*12*4.5mm
- Weight: 7.6g(with wires) 2g (without wires)
Be aware that this ESC has no BEC (one of the reason why they can be made so small and light), which means you will need additional 5V power source for your Radio receiver and flight controller. I recommend using one of your spare normal ESC if you want to save some money. :)
There are two series of ESCs, one is branded as SN20A which has SimonK flashed. The BL20A has BLHeli fimrware, so make sure you know which you are you buying.
Actually the DYS BL20A mini ESC was release late February / early March. But now more and more resellers are carrying them in the shops, making it more widely available. Here is a link to the DYS BL20A Mini ESC product page on Banggood, I like them because they offer free shipping world wide (you can also pay a little extra get it within a week).
RCTimer has a similar 20A mini ESC, from the layout of the component and PCB, it looks identical to the DYS BL20A ESC. I believe RCTimer just rebranded them.
DYS SN20A compared to a coin.
The RCTimer 20A Mini ESC.
Manual, instruction from DYS SN20A ESC.
Update (15 Jul 2015) – ESC on Fire
There have been lots of report of these SN20A ESC catching fire. Some say it’s a particular batch that caused issue. Anyway I did also experienced some quality control issues with these ESCs as well. 2 out of 8 were faulty from my order. Here are some pictures of the burnt ESC from our Multicopter group.