Power transistors for toy grade rc

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Yes right here are the refs of the transistors I have on the board
Actual one are : two 2SC3420 transistor
•Voltage: 50V
•Current: 5A
•Power: 10W

and for the two 2SA1357

•Volts: 20V
•Current: 5A
•Power: 10W

Guess all 4 make that thing called H bridge, so using mosfet for more power I will sure need a specific combination.
 

If you re-design the circuit so that Mosfets can replace its output transistors then it uses two N-channel Mosfets and two P-channel Mosfets.
An ordinary Mosfet needs an input of 10V to fully turn on but a "logic-level" Mosfet needs only 5V.

You will not get any more power, you will get a higher ability to produce more power if the supply and the motor use more power.
The motor will probably burn out at a higher power than it was designed for.
 

Thank you,

My project is just to be able to safely use the Lipo battery for the modest more power I will get. So using the logic level mosfet which oen is the one for PNP and NPN?? A I have 4 transistors right now two PNP and two NPN will I have to put 4 mosfet two P channel and two N??
 

The Mosfet you posted is a logic-level N-channel Mosfet. I do not know a P-channel logic level Mosfet.
We do not know if your circuit can be modified to use Mosfets.
 

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