who knows this transistor?

d.O.LF · 23rd February 2007, 11:48 AM

Hi all,

I have here a transistor where I know nothing about. The only thing I know that it is a PNP transistor.
Here's what's written on it:
SK
A957
170

I searched the web about this transistor but couldn't find anything. I hope maybe someone could give me more information about this transistor cause I would like to simulate the schematic where it's in in LTSPice....

Thank You!

dolf

Netlist · 23rd February 2007, 11:54 AM

Well, well...a neighbor.

A957 is 2SA957. Googling for the datasheet will be successful, don't know if a spice model can be found.

/Hugo - from Evergem

roender · 23rd February 2007, 11:54 AM

2sa957, PNP audio driver, Vceo 150V, Ic 2A, Pc 30W, Ft 20Mhz

jacco vermeulen · 23rd February 2007, 12:02 PM

The SK means it an original Sanken device, not 2d production.
A similar SK/SKN device is the 2SA1668.

d.O.LF · 23rd February 2007, 05:13 PM

Thank you very much!

I have found the datasheet (http://www.tranzistoare.ro/datasheets2/41/41160_1.pdf) and I'm wandering how I can transform this to Spice parameters.

I have found this program called spicemod to do this:
http://www.intusoft.com/spicemod.htm
But I can't seem to download it anywhere, does someone know a similar program?

Greetz,
dolf

@Netlist: If you live near Gent, do you know KAHO St.Lieven?

jacco vermeulen · 23rd February 2007, 05:18 PM

Dolfje Weerwolfje,

that's the datasheet of the Korean version of the 2SA957.

Netlist · 23rd February 2007, 05:41 PM

Dolf,
Making a model from a good datasheet is possible but you'll need the more qualified people around here.

Yes I know both campuses but I'm not familiar with their students.

/Hugo

d.O.LF · 23rd February 2007, 05:55 PM

Quote:

Originally posted by jacco vermeulen
that's the datasheet of the Korean version of the 2SA957.

Does that make any difference for the transistor parameters?

Netlist · 25th February 2007, 08:25 AM

No, 2SA957 is 2SA957.

/Hugo

d.O.LF · 25th February 2007, 11:28 AM

Since I couldn't get my hand on a spice model for the 2SA957, I looked for a model of the MJE15031 which according to what I've found could also do the job.

Hope it won't make a big difference.

Thank you very much for all the replies though!

@Netlist: I'm doing my thesis there and this simulation was part of my work to achieve my goal.

23rd February 2007, 11:48 AM	#1
d.O.LF diyAudio Member Join Date: Feb 2007 Location: gent	who knows this transistor? Hi all, I have here a transistor where I know nothing about. The only thing I know that it is a PNP transistor. Here's what's written on it: SK A957 170 I searched the web about this transistor but couldn't find anything. I hope maybe someone could give me more information about this transistor cause I would like to simulate the schematic where it's in in LTSPice.... Thank You! dolf

23rd February 2007, 12:02 PM	#4
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	The SK means it an original Sanken device, not 2d production. A similar SK/SKN device is the 2SA1668. __________________ Looks like Sponge Bob has killed another thread.

23rd February 2007, 05:18 PM	#6
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	Dolfje Weerwolfje, that's the datasheet of the Korean version of the 2SA957. __________________ Looks like Sponge Bob has killed another thread.

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23rd February 2007, 11:54 AM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	Well, well...a neighbor. A957 is 2SA957. Googling for the datasheet will be successful, don't know if a spice model can be found. /Hugo - from Evergem

23rd February 2007, 11:54 AM	#3
roender diyAudio Member Join Date: Sep 2006	2sa957, PNP audio driver, Vceo 150V, Ic 2A, Pc 30W, Ft 20Mhz

23rd February 2007, 05:13 PM	#5
d.O.LF diyAudio Member Join Date: Feb 2007 Location: gent	Thank you very much! I have found the datasheet (http://www.tranzistoare.ro/datasheets2/41/41160_1.pdf) and I'm wandering how I can transform this to Spice parameters. I have found this program called spicemod to do this: http://www.intusoft.com/spicemod.htm But I can't seem to download it anywhere, does someone know a similar program? Greetz, dolf @Netlist: If you live near Gent, do you know KAHO St.Lieven?

23rd February 2007, 05:41 PM	#7
Netlist diyAudio Moderator Join Date: Jan 2003	Dolf, Making a model from a good datasheet is possible but you'll need the more qualified people around here. Yes I know both campuses but I'm not familiar with their students. /Hugo

25th February 2007, 08:25 AM	#9
Netlist diyAudio Moderator Join Date: Jan 2003	No, 2SA957 is 2SA957. /Hugo

25th February 2007, 11:28 AM	#10
d.O.LF diyAudio Member Join Date: Feb 2007 Location: gent	Since I couldn't get my hand on a spice model for the 2SA957, I looked for a model of the MJE15031 which according to what I've found could also do the job. Hope it won't make a big difference. Thank you very much for all the replies though! @Netlist: I'm doing my thesis there and this simulation was part of my work to achieve my goal.

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