Smallest P channel Mosfet?

[BJ43]

BJ43, seems that you got transistors. Well, you asked about smallest ones Anyway I solder them using big glasses with just usual soldering iron.

My fault I should have defined smallest: Smallest is at least a 1/4 inches in other words someting large enough for 70 yr old fingers and eyes but not take up all the room in the box mod.

 

[slimest]

BJ43, if you need something bigger, you can try mosfet recommended by Quigsworth: http://www.digikey.ca/scripts/DkSea...g=en&keywords= IRLU3114ZPBF&x=16&y=11&cur=CAD
Good parameters and easy to mount.

Sorry for misleading you, I use these small mosfets everywhere... Soon will buy some again...

 

[BJ43]

BJ43, if you need something bigger, you can try mosfet recommended by Quigsworth: http://www.digikey.ca/scripts/DkSea...g=en&keywords= IRLU3114ZPBF&x=16&y=11&cur=CAD
Good parameters and easy to mount.

Sorry for misleading you, I use these small mosfets everywhere... Soon will buy some again...

Looking for a p channel in that size..
I am going to try and solder three wires to the tiny ones, maybe with two vodkas to steady the hands,,

 

[BJ43]

So far I have lost two (fell to the floor) and melted the leg off the third. I think I need more vodka.. lol

 

[Java_Az]

If the vodka doesn't work i would try a couple shots of tequila

 

[Robert T]

If you haven't got 'er done after the vodka and tequila at least you won't care.

 

[BJ43]

Gave up and ordered a fine point tip for my weller. The chisel point I have is bigger than the mosfet.
Can one of you electronic wizards give me a part # for a P channel mosfet that is small but not tiny, that will work with a tack switch.. Thanks

 

[Java_Az]

Gave up and ordered a fine point tip for my weller. The chisel point I have is bigger than the mosfet.
Can one of you electronic wizards give me a part # for a P channel mosfet that is small but not tiny, that will work with a tack switch.. Thanks

Need to know the operating voltage to recommend a mosfet

 

[BJ43]

Need to know the operating voltage to recommend a mosfet

I normally use 12 to 18 volt/5amp power source on my PTs and vape at 4 to 6 volts. I want to put a tack switch on the positive to the atty. Thanks for the help.

 

[Java_Az]

I normally use 12 to 18 volt/5amp power source on my PTs and vape at 4 to 6 volts. I want to put a tack switch on the positive to the atty. Thanks for the help.

Just to make sure your going to run the regulator always on and put the switch & mosfet on the output. So the gate voltage would be 4 to 6 volts.

If so here is one that might work for you , these are a 1/4 inch by a bit more then a 1/4 DMN6068LK3-13 Diodes/Zetex | DMN6068LK3-13DICT-ND | DigiKey if you need one bigger let me know

 

[BJ43]

Just to make sure your going to run the regulator always on and put the switch & mosfet on the output. So the gate voltage would be 4 to 6 volts.

If so here is one that might work for you , these are a 1/4 inch by a bit more then a 1/4 DMN6068LK3-13 Diodes/Zetex | DMN6068LK3-13DICT-ND | DigiKey if you need one bigger let me know

Ok now I am totally confused, I thought I had to use a P channel on the positive to the atty. What resistor would I use on the gate and can I wire it to the positive to the atty or on the neg?

 

[Java_Az]

Ok now I am totally confused, I thought I had to use a P channel on the positive to the atty. What resistor would I use on the gate and can I wire it to the positive to the atty or on the neg?

Whoops thats my bad . One too many shots of tequila thought i hit p channel in the filter , this one might work better SUD08P06-155L-E3 Vishay Siliconix | SUD08P06-155L-E3CT-ND | DigiKey


Edit: 10k to 100K for the resistor. It goes from gate to source. The gate on a P Channel would go to the output ground....Source would be positive output from the reg

 

[BJ43]

Whoops thats my bad . One too many shots of tequila thought i hit p channel in the filter , this one might work better SUD08P06-155L-E3 Vishay Siliconix | SUD08P06-155L-E3CT-ND | DigiKey


Edit: 10k to 100K for the resistor. It goes from gate to source. The gate on a P Channel would go to the output ground....Source would be positive output from the reg

Thanks, now I comprende...

 

[Java_Az]

Thanks, now I comprende...

your welcome,

I guess i should point out what i was looking for when selecting the mosfet. First i figured it would see a max of 3 amps so i try to double that on the max amp rating on the mosfet so i looked for 6 amps or higher. Then the main thing is to figure for the gate voltage. In the data sheet you want to look at the RDS ON. that chips data sheet gives you a 10 volt and a 4.5 volt RDS ON rating so you know it turn on @ 4.5 volts and gets a good saturation. 4.5 is close enough to 4 volts so it should still get good saturation. So the main thing is the RDS ON you want to make sure it will fully turn on or saturate @ your working gate voltage.

 

[TomCatt]

But fun soldering those things are pretty small. I often think about getting me one of those Chinese Mail Order brides With the only requirement being she has awesome soldering skillz.

Did a quick search, couldn't find any mail order brides claiming to have any awesome soldering skillz. Oh, well was a good idea ...

 

[StrikeEagleCC]

Here is what I've been using. big enough to clam in a helping hands, but small enough to need a fine point on your iron.