Transistor question

mike49504 · 20th March 2010, 09:57 PM

Im replacing the 2n2907's and 2222's in an amp the new ones i ordered have the emitter as being leg1 isnt it usually the collector (leg 1)?

Just wondering before i put theese in the amp the wrong way

wakibaki · 20th March 2010, 11:03 PM

Which package are they in? If it's the same package, it should be the same pinout. Sometimes the same die is put in different packages which have different pinouts, but the package will have other differences such as bent legs or triangle leg arrangement instead of inline or a different material if this is the case.

Double check with the suppliers info and the datasheet.

w

DUG · 20th March 2010, 11:04 PM

go to digikey.com or newark.com, etc. and find the data sheets on both parts

compare the pinout for each part/package

mike49504 · 21st March 2010, 01:56 AM

the transistors are both T0-92 package.

The kn2907 i pulled im replacing with Fpn2907 and leg 1 of the fpn2907 is the emitter leg.

But cant find a good datasheet to tell me what leg of the kn2907 is the emitter leg 1 or leg 3

Perry Babin · 21st March 2010, 03:27 AM

They have the same pin configuration.

http://www.keccorp.com/data/databook...g/KN2907_A.pdf
http://www.fairchildsemi.com/ds/PN/PN2907A.pdf

Teknofix · 22nd March 2010, 05:48 AM

Quote:

Originally Posted by Perry Babin

They have the same pin configuration.

http://www.keccorp.com/data/databook...g/KN2907_A.pdf
http://www.fairchildsemi.com/ds/PN/PN2907A.pdf

20th March 2010, 09:57 PM	#1
mike49504 diyAudio Member Join Date: Sep 2006	Transistor question Im replacing the 2n2907's and 2222's in an amp the new ones i ordered have the emitter as being leg1 isnt it usually the collector (leg 1)? Just wondering before i put theese in the amp the wrong way

20th March 2010, 11:04 PM	#3
DUG diyAudio Member Join Date: Jan 2003 Location: mississauga ontario canada	go to digikey.com or newark.com, etc. and find the data sheets on both parts compare the pinout for each part/package __________________ Doug We are all learning...we can all help

21st March 2010, 03:27 AM	#5
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	They have the same pin configuration. http://www.keccorp.com/data/databook...g/KN2907_A.pdf http://www.fairchildsemi.com/ds/PN/PN2907A.pdf __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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20th March 2010, 11:03 PM	#2
wakibaki Banned Join Date: Jan 2008 Blog Entries: 2	Which package are they in? If it's the same package, it should be the same pinout. Sometimes the same die is put in different packages which have different pinouts, but the package will have other differences such as bent legs or triangle leg arrangement instead of inline or a different material if this is the case. Double check with the suppliers info and the datasheet. w

21st March 2010, 01:56 AM	#4
mike49504 diyAudio Member Join Date: Sep 2006	the transistors are both T0-92 package. The kn2907 i pulled im replacing with Fpn2907 and leg 1 of the fpn2907 is the emitter leg. But cant find a good datasheet to tell me what leg of the kn2907 is the emitter leg 1 or leg 3

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