Ask for datasheet this transistor

[electra_ina]

I found this transistor model T03 with marking 14SE161. I search with google for find datasheet but nothing. I hope some one can help me to give datasheet TR 14SE161. Thanks before.


Sorry my english
Electra_ina

[singa]

Hello,

The S logo looks like it's from SGS microelectronica, an Italian
company that merged with Thomson of France in 1987 and is now knowned
as ST Microelectronics. I went to the website and no such number was
found.Anyway such an old device would not be listed.

If you know the power supply voltage of the amp, you can test with multimeter,of course with power off.If you can locate the base of the transistor if it is a bipolar transistor whether npn or pnp the positive red probe to base and black probe to either pin will mean it is n-positive-n one ( it will not conduct when wrong polarity of probes are switched) and vice versa.

If it is mosfet one pair of pins will most likely to conduct only (have a reading).I assume you know which range of the meter to use i.e. "diode test" or low ohm range.
But don't mistake a bipolar with one pair of pins that are "open" or defective for a mosfet!.

After you have determined which is which (bipolar or mosfet),now you just substitute a suitable transistor in TO3 package .

Hope this helps. Singa

[electra_ina]

Thanks..singa..
This transistor is bipolar NPN. I find it from my friend and now I try used on quasi complementary but I don't know this datasheet. With +/- 44vdc is ok. Then I will try with +/- 77 VDC, its blow up this transistor...

One againt, thanks
Electra_ina

[singa]

Originally Posted by electra_ina

Thanks..singa..
This transistor is bipolar NPN. I find it from my friend and now I try used on quasi complementary but I don't know this datasheet. With +/- 44vdc is ok. Then I will try with +/- 77 VDC, its blow up this transistor...

One againt, thanks
Electra_ina

Hi, I can only guess that 14se161 cannot run on +/- 77 .For that you have to
find a transistor that has 200V-250V CEO and the current to match because the current also increases.Try the Motorola types ( now knowned as
ON semiconductor).It is also likely you need to add extra pairs to share the
current between the power tranaistors.That would imply modification of
the hardware like heatsinks and wiring.

By the way the power transformer also need to be bigger to accomodate
the larger current consumption.Plus things like transistors, resistors and capacitors' voltage ratings . So I don't think it is advisable to do what you want do.( +/-77V) if you only want to increase supply voltage. Too many things to change. A lot of trouble and money. Singa.

[astankov]

Here it is one very simple schematic for measurimg VCEmax of an unknown transistor used by me.

Just connect collector to positive rail and emitter to negative (when an NPN device is measured) and the voltage meter will show you VCEmax.
After that transistor will not be damaged. If there is no meter reading reduse the value of the 1MOhm resistor and try again but not reduse it too much because it will damage the device.

Be aware that you are using mains voltage that is very dangerous and can kill you!!!

Sorry for the ugly drawing.

[Tekko]

Two back to back transformers will isolate the circuit from the mains.

[helan]

Hi Electra_ina,

The Logo is Solitron (Solitron Devices Inc.). Ask for specifications. The device is
obsolete.

Regards
helan

[electra_ina]

Thanks Helan..nice info..