Repairing and Upgrading Phoenix CC35 ESC to 45A

2 FETs burnt in the front and 1 FET at the back.

A new FET is soldered to the back. Spare spaces available to upgrade to cc45.

My CC35 has served me many years as a reliable ESC. The soft start and high current cut programme has been working perfectly. The only downside is the onboard BEC is too weak and on 4s, you can barely plug in 2 mini servos, even so the BEC gets very hot.

Recently my JGF 500T (at 4s@40A) meltdown the stator core after I continuous fly my F16 at over 170kph. The high current surge burnt 3 FET (IRF 7832) on the CC35 ESC board.
Most of the time FET will burnt in a closed circuit with the In/Out pins shorted. Sometimes the single Gate pin will short as well.

I try to fix it , tools needed:
1) replace with some cheap IRF 7832 (cost~HKD $3 only)
2) 100W solder gun, best with temp. control., or blow torch soldering
3) Desoldering wire ( To clean any excess solder left on the board
4) Ohmmeter- to check for short circuit.


1) Remove all burnt FETs, usually complete row of a single polarity is burnt.
DO NOT BRUTE FORCE BY PRYING IT, OR USE TOO HIGH TEMP SOLDERING GUN TO TAKE IT OUT.
I use metal cutter to shear away the top of the FET, then carefully remove the pin with soldering gun. Clean any excessive solder with desoldering wire.
2) Check for short circuit or continuity of the board. Input -- Output - Gate
3) Apply flux on the new FET, to ensure a true soldering point.
4) Apply some glue to the back of the FET to stick it into correct place. (or anyway U can think of)
5) Press lightly on the FET (with a forcep) and apply solder. Be careful to limit the soldering time less than 2 seconds.
6) I test the ESC with a motor after soldering of each FET.
7) Finally I add another 6 FET to Upgrade it to 45A!