IN MY CAR OPEL VECTRA THE A/C IS NOT WORKING BECAUSE THE CONTROL CARD HAS A PROBLEM.I OPEN IT AND I SEE THE MOSFET ON5194 IS BURNED.I TRY TO FIND ONE TO CHANGE AND I CAN NOT.IN A SHOP TELLS ME THAT THE MOSFET IRL2203 IS THE SAME.I PUT IT ON THE BOARD WORKS FOR 2 MINUTES AND THEN BURNED AND CRACKED AND THE A/C WORKS CONTINUISLY WITHOUT STOPPING.DO YOU KNOW IS THE SAME MOSFET WITH THE SAME CHARACTERISTICS?ANY OTHER IDEA WHAT IS GOING ON.

 

SORRY ID DOES NOT BURN THE ILR2203 BUT ANOTHER MOSFET NEXT TO ,A STPS1545

 

Can you post the circuit diagram of the control card and the magnetic clutch? Your description of the problem is confusing.

 

The mosfet will be fed by a pwm controller to power the motor speed, the clutch will be fed from a relay, best to post pictures of the pcb.

 

The ON5194 is a N-Channel Trenchfet. Any similar device with at least 150W, 80A, 40V and low Vgs-threshold, will do.
The device next to it is a 20A Schottky diode