Transitors(semiconductors)

elwabb · 12th February 2008, 06:41 AM

Can someone please let me know if C4370A is the same as KTC4370A? and if so can it be replaced with 2SC4359.Thanks

Corax · 12th February 2008, 10:37 AM

Hi elwabb,

pls post a picture of that specific transistor. The abbreviation ...C4370A is commonly used by japanese transistors and the not shown postfix is usually a 2S... - completing the part number to 2SC4370A. Nevertheless to make sure a picture might tell us/me the manufacturer of the device by identifying the logo (if there's any one at the device). This could be any other "strange" looking letter or some sort of a lasered logo specific for that manufacturer.
You might find something similar to that shown here:
http://www.aufzu.de/semi/gif/

In case it comes out as the mentioned KTA4370A you're in luck and you already got the right datasheet.
According to my quick investigation there's also a divice known as 2SC4370A, but I couldn't find any datasheet to download. Nevertheless the manufacturer supposed to be NEC and the device comes in a TO-251 package.

poynton · 12th February 2008, 10:46 AM

http://pdf1.alldatasheet.com/datashe...C/KTC4370.html

Andy

Corax · 12th February 2008, 11:25 AM

I finally found at least something:

http://www.datasheetarchive.com/2SC4370-datasheet.html

It supposed to be an NPN audio driver/output device with Vce=160V, Ic=1.5, Ptot=20W, hfe=70-240 and an ft=100MHz(!) and comes in a TO220 case.
Hm, not bad that buddy, in particular the ft of 100MHz would be a good reason to consider that transistor in the next design

According to the PDF-files a recommended replacement would be the 2SC4159 (Sanyo), 2SC3298 (Toshiba), 2SD1587 (NEC), 2SD1772 (Matsushita) and finally the 2SD1763A (Rohm).

Hopefully that was of any considerably help ...

Corax · 12th February 2008, 11:39 AM

hi elwabb,

I compared both datasheets with the result that they're both almost identical except for the Vce rating. The NEC type has a 20 volt lower Vce than the KEC one. If the voltage in your equipment (whatever it is) comes close to or exceeds a Vce of 160V you better be sure who's the manufacturer of it in case you really wanna replace it. Besides I haven't checked the voltages of the recommended raplacements for the NEC 2SC4370A. You might do a little further investigation yourself

elwabb · 12th February 2008, 05:50 PM

thanks alot,I don't have a high resolution camara to take pictures of it but I'll try to describe it to you/you all To-220 type it has a K up top cenert the under it it has C4370A then under that has a Y then a space then a 044.Thanks I really appriciate your help.

Corax · 13th February 2008, 07:22 AM

Hi elwabb,

I finally found the homepage of KEC:
http://www.keccorp.com/

The marking specification of the transistor is explained at
http://www.keccorp.com/data/databook...20ktc4370a.pdf
and it comes out that your transistor is really the KEC type KTC4370A !!!

More information for that transistor can be found at
http://www.keccorp.com/chi/productin...eyword=KTC4370

elwabb · 13th February 2008, 05:21 PM

Thanks alot as I mentioned before I am new to electronics and this is my first project I really appreciate all your help,again thanks

12th February 2008, 06:41 AM	#1
elwabb diyAudio Member Join Date: Feb 2008	Transitors(semiconductors) Can someone please let me know if C4370A is the same as KTC4370A? and if so can it be replaced with 2SC4359.Thanks

12th February 2008, 05:50 PM	#6
elwabb diyAudio Member Join Date: Feb 2008	transistors(semicoductors) thanks alot,I don't have a high resolution camara to take pictures of it but I'll try to describe it to you/you all To-220 type it has a K up top cenert the under it it has C4370A then under that has a Y then a space then a 044.Thanks I really appriciate your help.

13th February 2008, 05:21 PM	#8
elwabb diyAudio Member Join Date: Feb 2008	transistorsSemiconductors) Thanks alot as I mentioned before I am new to electronics and this is my first project I really appreciate all your help,again thanks

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
why mute transitors veil the sound ?	plep	Digital Source	17	2nd February 2008 05:30 AM
Help identifying Tadiran semiconductors	AMV8	Parts	3	6th September 2007 11:45 AM
Old RCA Transitors Amp	baba	Solid State	4	11th June 2005 12:03 AM
Misc power semiconductors	rickp	Swap Meet	0	8th July 2004 11:12 PM


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

12th February 2008, 10:37 AM	#2
Corax diyAudio Member Join Date: Feb 2005 Location: south of lower saxon	Hi elwabb, pls post a picture of that specific transistor. The abbreviation ...C4370A is commonly used by japanese transistors and the not shown postfix is usually a 2S... - completing the part number to 2SC4370A. Nevertheless to make sure a picture might tell us/me the manufacturer of the device by identifying the logo (if there's any one at the device). This could be any other "strange" looking letter or some sort of a lasered logo specific for that manufacturer. You might find something similar to that shown here: http://www.aufzu.de/semi/gif/ In case it comes out as the mentioned KTA4370A you're in luck and you already got the right datasheet. According to my quick investigation there's also a divice known as 2SC4370A, but I couldn't find any datasheet to download. Nevertheless the manufacturer supposed to be NEC and the device comes in a TO-251 package.

12th February 2008, 10:46 AM	#3
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)	http://pdf1.alldatasheet.com/datashe...C/KTC4370.html Andy

12th February 2008, 11:25 AM	#4
Corax diyAudio Member Join Date: Feb 2005 Location: south of lower saxon	I finally found at least something: http://www.datasheetarchive.com/2SC4370-datasheet.html It supposed to be an NPN audio driver/output device with Vce=160V, Ic=1.5, Ptot=20W, hfe=70-240 and an ft=100MHz(!) and comes in a TO220 case. Hm, not bad that buddy, in particular the ft of 100MHz would be a good reason to consider that transistor in the next design According to the PDF-files a recommended replacement would be the 2SC4159 (Sanyo), 2SC3298 (Toshiba), 2SD1587 (NEC), 2SD1772 (Matsushita) and finally the 2SD1763A (Rohm). Hopefully that was of any considerably help ...

12th February 2008, 11:39 AM	#5
Corax diyAudio Member Join Date: Feb 2005 Location: south of lower saxon	hi elwabb, I compared both datasheets with the result that they're both almost identical except for the Vce rating. The NEC type has a 20 volt lower Vce than the KEC one. If the voltage in your equipment (whatever it is) comes close to or exceeds a Vce of 160V you better be sure who's the manufacturer of it in case you really wanna replace it. Besides I haven't checked the voltages of the recommended raplacements for the NEC 2SC4370A. You might do a little further investigation yourself

13th February 2008, 07:22 AM	#7
Corax diyAudio Member Join Date: Feb 2005 Location: south of lower saxon	Hi elwabb, I finally found the homepage of KEC: http://www.keccorp.com/ The marking specification of the transistor is explained at http://www.keccorp.com/data/databook...20ktc4370a.pdf and it comes out that your transistor is really the KEC type KTC4370A !!! More information for that transistor can be found at http://www.keccorp.com/chi/productin...eyword=KTC4370

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read