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Electronics => Beginners => Topic started by: sonnytiger on September 12, 2013, 10:31:04 pm

Title: What is the name of this transistor package?
Post by: sonnytiger on September 12, 2013, 10:31:04 pm
And/or what is the pin numbering?
Title: Re: What is the name of this transistor package?
Post by: xrunner on September 12, 2013, 10:46:04 pm
Quote from: sonnytiger on September 12, 2013, 10:31:04 pm
And/or what is the pin numbering?

These?

Quote
These are some rare find of genuine Faircield made factory new, 2N3646 silicon N-P-N Transistors in a covar TO-92 Package and have gold plated wire leads. These unused vintage units made in the seventies. These transistors are made for High Speed Swicth and Small Signal industrial and commercial applications. They are Planar construction for low noise and leakage and have low saturation voltage. They have a VCE=15 V, capable to handle a 0.20 Ampere continuous collector current, a unity Gain Bandwidth product FTmin=350 MHz and they have a 0.2 Watts maximum power dissipation and a minimum DC beta of 30 with a collector current of 30 mA. These are real hard to find vintage collector's choice semiconductors.

http://oddmix.com/semi/2n3646.html (http://oddmix.com/semi/2n3646.html)

(http://oddmix.com/semi/px/2n3646.jpg)
Title: Re: What is the name of this transistor package?
Post by: oPossum on September 12, 2013, 10:52:36 pm
TO-106 package

May be a BC418, PNP, CBE
Title: Re: What is the name of this transistor package?
Post by: sonnytiger on September 12, 2013, 10:56:35 pm
Quote from: oPossum on September 12, 2013, 10:52:36 pm
TO-106 package

May be a BC418, PNP, CBE

That is the package thanks!
It's a 2n3645

Thanks a lot!
Title: Re: What is the name of this transistor package?
Post by: sonnytiger on September 12, 2013, 11:01:09 pm
I found this diagram though am not sure which one would be base, emitter etc. Can't find anything online with a 10 minute search.
Title: Re: What is the name of this transistor package?
Post by: Andy Watson on September 12, 2013, 11:12:38 pm
Quote
I found this diagram though am not sure which one would be base, emitter etc.
Usually, (no guarantees though) the emitter is next to the flat and the base in the middle.
Title: Re: What is the name of this transistor package?
Post by: sonnytiger on September 12, 2013, 11:37:28 pm
okay good enough for me thanks!
Title: Re: What is the name of this transistor package?
Post by: alm on September 12, 2013, 11:58:15 pm
If you have a working sample then you can easily measure it: the BE and BC junction should act like a diode, with the BE having a slightly higher forward voltage drop than the BC junction.
Title: Re: What is the name of this transistor package?
Post by: sonnytiger on September 13, 2013, 09:17:09 pm
Would that work in circuit?
Title: Re: What is the name of this transistor package?
Post by: vk6zgo on September 14, 2013, 05:04:09 am
Quote from: sonnytiger on September 13, 2013, 09:17:09 pm
Would that work in circuit?

If the circuit is working it is easy!

Just measure the voltages with respect to chassis.
If it is an NPN,the highest positive voltage will be the collector,the lowest the emitter,& the base will be about 0.7 volts higher than the emitter.

If it is PNP & the equipment has a negative supply,the above comments apply,with the polarity changed.

Sometimes,transistors will be fitted "upside down"where the collector will be at,or close to, chassis potential,but
the relationships between elements still apply.

Title: Re: What is the name of this transistor package?
Post by: sonnytiger on September 14, 2013, 08:03:37 pm
I meant measure with a multimeter in circuit, can't power it on :/
Title: Re: What is the name of this transistor package?
Post by: edavid on September 14, 2013, 08:18:35 pm
Don't sweat it, a 2N part in TO106 will have EBC pinout.
Title: Re: What is the name of this transistor package?
Post by: sonnytiger on September 16, 2013, 01:14:00 am
ok cool thanks!