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four-pin SCR

 
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dubs_suzie



Joined: 06 Jan 2006
Posts: 3

PostPosted: Fri Jan 06, 2006 9:16 am    Post subject: four-pin SCR Reply with quote

How do you test a four-pin SCR to know whether it is good or bad ?l
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PostPosted: Fri Jan 06, 2006 10:25 pm    Post subject: Re: four-pin SCR Reply with quote

dubs_suzie wrote:
How do you test a four-pin SCR to know whether it is good or bad ?l


ok u nead small ac psu (a dc one can work but it for more on how to use a dc one ask) a load ,multimter a triging serket ,2 of the pins are for triging and the other 2 are for the load (look up "icmaster.com or other sites) conect the triging sercet (if u don`t have one u can bild one 555 oserlater work just fine, ps do`t forget to use diacks or u could pop your scr) connet voltage to load with scr inbetween puls the gate and test with mulimeter ,,, or get your self one of thow fancy mulimeters that can test scr`s or bild your-self a scr tester (2 caps 2 555s 2 led`s 8 resisters)

ok
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PostPosted: Sat Jan 07, 2006 2:33 pm    Post subject: Four Terminal SCR Testing Reply with quote

Pardon my ignorance, but what is a four-terminal SCR? What does the fourth terminal do? Do you have a part number or a Spec Sheet?

awright
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PostPosted: Sun Jan 08, 2006 1:25 am    Post subject: Reply with quote

4 pin scr is 2 scr`s back to back used in swichmode psu ..(thyristors) are used but or "(sibod) Tm" go to the "ecg" site or pinouts or icmaster.com

the more you read the beter

and remember there is no such thing as a stupit question.
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stephanvo



Joined: 06 Jan 2006
Posts: 5

PostPosted: Sun Jan 08, 2006 1:46 am    Post subject: SCR in 4-pi Reply with quote

FS0401BD 200 V, surface mount SCR in 4-pin DPAK package. Operational temperature range from -40°C to 125°C.
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swatiroy
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PostPosted: Thu Dec 16, 2010 5:35 am    Post subject: 4 TERMINAL SCR Reply with quote

can anyone tell me from where I can get 70NT140 datasheet. It is a 4 pin IC, but the datasheet is not available on net.
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vtech



Joined: 08 May 2006
Posts: 1264
Location: USA

PostPosted: Sat Dec 18, 2010 3:37 am    Post subject: Re: 4 TERMINAL SCR Reply with quote

swatiroy wrote:
can anyone tell me from where I can get 70NT140 datasheet. It is a 4 pin IC, but the datasheet is not available on net.


Sounds more like a house number. What circuit is it in? Is there any logo printed on the IC?
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