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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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. 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. Sign datahseet or log in Sign up using Google.

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 can vouch for seeing it on a design I was asked to look at. Infineon document on thermal instability. This is the thermal runaway I refer to.

I have tested it only for few seconds at this power. Sign up using Email and Password. VGS datazheet be greater than 4V to lower Ron. I tested today at 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.


At the time I did not understand the SOA curves. I couldn’t find anything at 0Hz linear operation. Sign up using Facebook. 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.

It was not even warm, maybe only at 35C or so. On semi document on thermal instability Infineon document on thermal instability Ditto from Fairchild Nasa document explaining it Which figure? This isn’t some theoretical annoyance that datashee really happen.

Nasa document explaining it. I have a large heatsink with a fan on it. Home Questions Tags Users Unanswered. Can you please link the datasheet?

It might not even be very warm at all. However, I have tested it a lot at Datassheet and 1A. Expecting reliability at any more than 30W even with excellent cooling is unrealistic.

IRFZ44 MOSFET N-CH 60V 50A TOAB Vishay IR datasheet pdf data sheet FREE from

Indraneel 1, 4 It is huge difference between 3A 40V and 3A 5V. On semi document on thermal instability. I have built an electronic load. Did you not understand my answer with Temp rise? Figure 1 and figure 2 describe the DC operations despite this measurement being made with a 20 us pulse: Damage could be caused by overheat in your case DC load.

In hindsight, I should have added a couple of resisters upstream of the drain to lower urfz44 voltage across the mosfet. So to answer my own question Any idea what the max current might be at 30V and 40V so as not to cause damage?


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IRFZ44 MOSFET. Datasheet pdf. Equivalent

This one failed with only 2. The continuous current is when the mosfet is fully on.

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 datzsheet subject to these policies. Email Required, but never shown. Added on APR Case temp does not go over 40C.

Tony EE rocketscientist 62k 2 21 Yes, a MOSFET will go into thermal runaway if the gate-source voltage is below the zero-temperature-coefficient threshold. Well, the mosfet died. The electronic load does work badly smoothed 40V DC 3A. Seems to hold up well. Andy aka k 10 It should probably tolerate a lot if the Vds is limited to only about 10V. So that probably explains the missing dc line in the SOA curve.

This mosfet will fail at above 2A datashewt all voltages below 20V. The dc curve is a flat line at about 2A till 20V, and falls sharply after that to mA at 40V. So, they too may in reality be curving downwards much more at higher voltages i. This also means the SOA curves in the datasheet are probably not all correct.

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