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Tell me please about MOFETs

 
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baba mi



Joined: 05 Dec 2004
Posts: 4

PostPosted: Tue Jan 04, 2005 6:42 am    Post subject: Tell me please about MOFETs Reply with quote

Tell me please how to detrmine if a mofet is dead or still works. And one more question. I have a MOFET with the following written on it :
011
IRFZ44A
and the other:
012
IRFZ44A

Could you please tell me what this "A" at the and means?Is it part of the name or it means that the mofet is 44 Ampers.
Because I am looking to buy a new one and I found with out the "A" and in the specification was said it is 50 Ampers.;
Thank you in advance
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PostPosted: Tue Jan 04, 2005 11:39 am    Post subject: Reply with quote

http://katalogi.iele.polsl.gliwice.pl/
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000andrzej
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PostPosted: Tue Jan 04, 2005 12:24 pm    Post subject: Reply with quote

At the and "44A" doesn't mean 44 Ampers. It's part of the name. You must to check parameters IRFZ44A and IRFZ44 (without A). Probably you can use some of the IRFZ44 series. (But I'm not sure - it has to check)
Can you write, what equipment would you use that for?
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baba mi



Joined: 05 Dec 2004
Posts: 4

PostPosted: Tue Jan 04, 2005 1:26 pm    Post subject: Reply with quote

000andrzej wrote:
At the and "44A" doesn't mean 44 Ampers. It's part of the name. You must to check parameters IRFZ44A and IRFZ44 (without A). Probably you can use some of the IRFZ44 series. (But I'm not sure - it has to check)
Can you write, what equipment would you use that for?

I am trying to repair an Amplifire Blaupunkt GTA 400 that doesn't work
When I opened it i found one MOFET was burned. But i am strugling to find any kind of shematics or any info about it. So I'll try evrything. If you are intrested i can show pictures just give me e-mail
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Atom



Joined: 26 Nov 2004
Posts: 29
Location: Tennessee, USA

PostPosted: Tue Jan 04, 2005 2:30 pm    Post subject: Reply with quote

baba mi wrote:
Tell me please how to detrmine if a mofet is dead or still works.


http://forum.eserviceinfo.com/viewtopic.php?p=2877&highlight=#2877
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000andrzej
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PostPosted: Tue Jan 04, 2005 6:07 pm    Post subject: Reply with quote

I did't find a scheme of amp., but I checked parameters of the transistors. You can use IRFZ44 without "A". If you will see data sheets all transistors IRFZ44 series have Idg about 46 - 50A. It's enough in that case. In your case if you change one transistor of them you should change second one from the same cannal (the same name). They aren't expensive.
I dont know how to amplifier was burned and what happened before.

Before you'll connect to power, you must check another elements which are responsible for the correct work of the transistors.
Good luck Wink
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baba mi



Joined: 05 Dec 2004
Posts: 4

PostPosted: Tue Jan 04, 2005 7:02 pm    Post subject: Thank you evrybody Reply with quote

Thank you evrybody
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