Hello, My friend has a question. He is not an arduino person but has a Question about N-channel mosfets.
The MOSFET listed works but may not be available.
Most others with 30V max and 100 A have small chips and will burn out
eventually in application. A weaker model was used in the past, leading to
occasional burnout. The number listed above allows the correct use of its SOA.
The app ramps load up from zero to 12V during excursions in the linear region.
Zero to 12 in 30ms
Maximum load is 27 amps but may go higher in the future.
He wanted to know if There was another he can use besides this one that has the same foot print.
This is not an Arduino related question either. You can use google to find what you want, it comes in a standard SMD (Surface Mounted Device) package. You will have to determine what parameters are important. Since I do not know the application I cannot do that for you. I do not know what a weaker device is, they have ratings that they will meet. If I put 100 volts on source/drain it will fail. If I use a 1A 300 V MOSFET it will be OK. Weaker is a subjective not an objective term.
Hello, Sorry for the late reply. I been dealing with health problems. You are right it is not an arduino question well in part. It has a arduino board on it. But this part has nothing to do with the arduino. He is trying to find a replacement for something that keep on burning up internally. I'm just relaying back to him.
This appears to be the one you are wanting to find a replacement for (SQD100N03-3m4) :
In principle, ensure that it roughly matches the old one, that is N-Channel, To-252 package, and don't exceed the listed maximum characteristics.
Look for one with an equivalent or better (lower) RDS(on) because this tells you how much heat it will dissipate when fully conducting.
With 50 Amps and a 6 milliohm RDS(on) you have to dissipate 15 Watts. At 27 volts, it is only 4.4 Watts.
Usually, you switch a mosfet cleanly on or off and do not rely on its behaviour in the transition state so the following may complicate the selection of a suitable substitute: