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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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. Chupacabras 3, 2 11 The dc curve is a flat line at about 2A till 20V, and falls sharply after that to mA at 40V.

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. 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.

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. I have built an electronic load.


VGS must be greater than 4V to lower Ron. Did you not understand my answer with Temp rise?

Damage could be caused by overheat in your case DC load. I have tested it only for few seconds at this power. Any idea what the max current might be at 30V and 40V so as not to cause damage?

So that probably explains the missing dc line in the SOA curve. At the time I did not understand the SOA curves. Expecting reliability at any more than 30W even with excellent cooling is unrealistic. This isn’t some iirfz44 annoyance that doesn’t really happen.

IRFZ44, SiHFZ44 product information

This mosfet will fail at above 2A at all voltages below 20V. So, they too may in reality be curving downwards much more at datazheet voltages i. This one failed with only 2. I tested today ifz44 On semi document on thermal instability Infineon document on thermal instability Ditto from Fairchild Datasheef document explaining it Which figure? It should probably tolerate a lot if the Vds is limited to only about 10V.

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. Infineon document on thermal instability. Can you please link the datasheet? I can vouch for seeing it on a design I was asked to look at.

Figure 1 and figure 2 describe the DC operations despite this measurement being made with a 20 us pulse: You have to work with power dissipation figures.


It might not even be very warm at all. This also means the SOA curves in the datasheet are probably not all correct.

IRFZ44 MOSFET Datasheet pdf – Equivalent. Cross Reference Search

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. Well, the mosfet died. Seems to hold up well. Case temp does not go over 40C.

So to answer my own question Email Required, but never shown. This is the thermal runaway I refer to. Andy aka k 10 The continuous current is when the mosfet is fully on. Indraneel 1, 4 Sign up or log in Sign up using Google. Yes, a MOSFET will go into thermal runaway if the gate-source voltage is below the zero-temperature-coefficient threshold.

Added on APR Tony EE rocketscientist 62k 2 21 The electronic load does work badly smoothed 40V DC 3A. On semi document on thermal instability. I have a large heatsink with a fan on it. It was not even warm, maybe only at 35C or so. Post as a guest Name.

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