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Old 9th September 2010, 07:16 AM   #1
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Default need transistor equivalent book ....

hello

i need transistor equivalent books pls help me ......
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Old 9th September 2010, 07:36 AM   #2
Mooly is online now Mooly  United Kingdom
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The web has made these kind of obsolete in a way, although they are still available.
Free data sheets here,
Datasheet catalog for integrated circuits, diodes, triacs, and other semiconductors, view

Are you looking for a specific item to replace ?

International Transistor Selector: Update 5: Amazon.co.uk: T.D. Towers, Anthony Cawkwell: Books

which I see is out of stock... no one uses them anymore
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Old 9th September 2010, 12:54 PM   #3
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Default hi

hello sir
in my amp i use 2sa1943&2sc5200 .i want to make my amp more powerful so i am founding any replace for them.....
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Old 9th September 2010, 05:01 PM   #4
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Hi,
We would need a lot more info than that. The power of an amp is determined primarily by it's power supply, and the load impedance it works into. The heatsinking arrangements are of vital importance too.

Just replacing transistors won't in itself make the amp more powerful unless the above are also altered... there's a lot more to it than that.

What's the amp in question anyway ?
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Old 11th April 2015, 08:39 PM   #5
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Hi, looks like no one has a transistor replacement guide that can be viewed or purchased. I too need to find a replacement for a transistor in my Marantz SR4000. The transistors are: 2SC2634 or 2SC945. I have tried at Mouser and Digikey without success. These transistors are in the speaker protection relay circuit. Would really appreciate any help.
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Old 12th April 2015, 02:02 PM   #6
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Default Transistors equivalences

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Originally Posted by goodknight10 View Post
Hi, looks like no one has a transistor replacement guide that can be viewed or purchased. I too need to find a replacement for a transistor in my Marantz SR4000. The transistors are: 2SC2634 or 2SC945. I have tried at Mouser and Digikey without success. These transistors are in the speaker protection relay circuit. Would really appreciate any help.
Replacemente for 2SC945 = BF181 (PHILIPS) - (BFX59) (SIEMENS) BC182L (EURO) 2N5209 (USA) PARAMETERS = Vcb 50V; Vce 40v; Veb 5V ; Ic 100mA; PTot 250mW (All param. are Max Values). Hfe 75 min. @ 1Ma

for 2SC2634 sorry not equivalent param. are Vcb 60V; Vce 50V; Veb 7v; Ic 100mA ; PTot. 400 mW ; (All param. are Max Values) Hfe 180 min @ 2mA Both are NPN Transistors in TO92 case.
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Old 14th April 2015, 10:41 AM   #7
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Is this the best forum area for a thread about transistor replacements?
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Old 14th April 2015, 10:55 AM   #8
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Quote:
Originally Posted by DF96 View Post
Is this the best forum area for a thread about transistor replacements?
Nope

'tis an old thread. Now in parts.
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Old 14th April 2015, 02:27 PM   #9
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Default Pardon me

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Is this the best forum area for a thread about transistor replacements?
I'm sorry, it's my fault! I only tried to help a friend in need!
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Old 14th April 2015, 05:12 PM   #10
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Quote:
Originally Posted by cicero32 View Post
I'm sorry, it's my fault! I only tried to help a friend in need!
Your fault ? How so The thread was already here so you did nothing wrong by replying to a question.
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