identifying a to92 transistor (S107)

kasra · 13th April 2006, 02:50 PM

Anyone know what the full name of this transistor might be?

Its marked: "S107" PH92

Its from a late -90s amplifier

BS107 perhaps?

Netlist · 13th April 2006, 09:06 PM

It could be BS107 which is a mosfet or a TIS107 which is a transistor. A DMM could help you here.

BS107: V-MOS, LogL, 200V, 0,13A, 1W, <26ohm
TIS107: Uni, 60V, 0,2A, 0,36W, >200MHz

/Hugo

kasra · 13th April 2006, 09:27 PM

thanks for the help Hugo.

I have a Multimeter with NPN&PNP transistor tester that measures HFE.

How can i use it to identify it?

Netlist · 13th April 2006, 09:48 PM

Basically, if the DMM has a diode tester you should be able to measure the BE and BC diode if it's a transistor.
If it's a fet, with the probes between drain and source and touching the gate with your finger the fet should start conducting.
I don't have the correct pin out at hand at the moment so you'll have to find it with some trial and error.
Here a more visual approach; pictures tell a thousand words...
http://www.bcae1.com/ampfail.htm

/Hugo

kasra · 13th April 2006, 10:24 PM

thanks for the help.

It seems to be a BS107 =)

davidsrsb · 14th April 2006, 05:39 AM

The BS107 is usually used as a relay driver.
MOSFETs have a parasitc diode between source and drain

13th April 2006, 02:50 PM	#1
kasra diyAudio Member Join Date: Nov 2001 Location: Sweden	identifying a to92 transistor (S107) Anyone know what the full name of this transistor might be? Its marked: "S107" PH92 Its from a late -90s amplifier BS107 perhaps?

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13th April 2006, 09:06 PM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	It could be BS107 which is a mosfet or a TIS107 which is a transistor. A DMM could help you here. BS107: V-MOS, LogL, 200V, 0,13A, 1W, <26ohm TIS107: Uni, 60V, 0,2A, 0,36W, >200MHz /Hugo

13th April 2006, 09:27 PM	#3
kasra diyAudio Member Join Date: Nov 2001 Location: Sweden	thanks for the help Hugo. I have a Multimeter with NPN&PNP transistor tester that measures HFE. How can i use it to identify it?

13th April 2006, 09:48 PM	#4
Netlist diyAudio Moderator Join Date: Jan 2003	Basically, if the DMM has a diode tester you should be able to measure the BE and BC diode if it's a transistor. If it's a fet, with the probes between drain and source and touching the gate with your finger the fet should start conducting. I don't have the correct pin out at hand at the moment so you'll have to find it with some trial and error. Here a more visual approach; pictures tell a thousand words... http://www.bcae1.com/ampfail.htm /Hugo

13th April 2006, 10:24 PM	#5
kasra diyAudio Member Join Date: Nov 2001 Location: Sweden	thanks for the help. It seems to be a BS107 =)

14th April 2006, 05:39 AM	#6
davidsrsb diyAudio Member Join Date: Dec 2005 Location: Kuala Lumpur	The BS107 is usually used as a relay driver. MOSFETs have a parasitc diode between source and drain

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