IRFZ BVDSS = 60 V. RDS(on) = Ω. ID = 50 A. ± . .. Obsolete. This datasheet contains the design specifications for. IRFZ44 Transistor Datasheet, IRFZ44 Equivalent, PDF Data Sheets. MOSFET. Parameters and Characteristics. Electronic Component Catalog. Advanced HEXFET® Power MOSFETs from International. Rectifier utilize advanced processing techniques to achieve extremely low.

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Extrapolating the points where the mosfet worked and did not work the imaginary DC operation line does not give me a line parallel to the other lines at difference pulse widths. Within about a milli second, a hot spot can develop in the hexfet and a localized temperature of over centigrade results and blows a hole in it before the feedback loop can respond.

It’s made with a pulse to prevent self-heating and the remotest possibility of thermal runaway at lower gate voltages; note how a gate voltage of 4. I couldn’t find anything at 0Hz linear operation.

IRFZ44 Datasheet(PDF) – International Rectifier

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. This isn’t some theoretical annoyance that doesn’t really happen. So to answer my own question So that probably explains the missing dc line in the SOA curve. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.


In hindsight, I should have added a couple of resisters upstream of the drain to lower the voltage across the mosfet. Damage could be caused by overheat in your case DC load. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. However, I have tested it a lot at V and 1A. VGS must be greater than 4V to lower Ron.

At the time I did not understand the SOA curves. Nasa document explaining it.

I tested today at Email Required, but never shown. The electronic load does work badly smoothed 40V DC 3A. Did you not understand my answer with Temp rise? You have to work with power dissipation figures. It was not even warm, maybe only at 35C or so. Expecting reliability at any more than 30W even with excellent cooling is unrealistic.

IRFZ44, SiHFZ44 product information

Sign up using Email and Password. Infineon document on thermal instability. I have tested it only for few seconds at this power.

Home Questions Tags Users Unanswered. Chupacabras 3, 2 11 The IRFZ44N is a hexFET designed for switching applications so using it in linear applications runs a risk of destroying it and you being left scratching your head as to why it went pop. The dc curve is a flat line dqtasheet about 2A till 20V, and falls sharply after that to mA at 40V. Case temp does not go over 40C.


Sign up using Facebook. Andy aka k 10 It should probably tolerate a lot if the Vds is limited to only about 10V. Indraneel 1, 4 Otherwise, I may have to change it all to a 2N and make a mess.

I can vouch for seeing it on a design I was asked to look at. Seems to hold up well. So, they too may in reality be curving downwards much more at higher voltages i.

Sign up or log in Sign up using Google. Added on APR I have built an electronic load. The continuous current is when the mosfet is fully on.

This also means the SOA curves in the datasheet are probably not all correct. On semi document on thermal instability Infineon document on thermal instability Ditto from Fairchild Nasa document explaining it Which figure?

This mosfet will fail at above 2A at all voltages below 20V.