WANTED: P-MOSFET with low Rds-on and logic level drive capability

Posted by: @j526

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Hi Friends, today i am hunting for a P-channel MOSFET with low Rds-on.

My requirements:

* P-channel MOSFET transistor

* THT (not SMD)

* low Rds-on, i would say as low as possible, in range of 1-20 mOhm would be excellent

* low Vth treshold voltage so it can be fully on and off switching with 5V logic (or even 3.3V would be interesting)

* last but not least, it should be available on Aliexpress, for economic reasons

 

I can give back an excellent tip for an N-channel IRLB3034 with Rds-on about 2 mOhm at Vgs = 4.5V, but was unable to find a similar in properties P-channel transistor 🙁

Don't we all. The SMD issue may be a problem, but have you considered using an interposer board? These are small boards that you stick normal header pins on and solder the SMD device to the board. Using paste and a hot air gun or even a decent soldering gun is quite a bit easier with the interposer board than working directly on the PCB. I have some coming from DigiKey today or tomorrow including a DMG2305UX P chan Mosfet (datasheet attached) I bought 10 for $3.89 from DigiKey. Since I bought a few other things (over $100) shipping is free. The interposer boards I got from Amazon(.ca for me) and cost $7.49CDN for 10. If you still need THT, they are available, but I don't recall the part number. If I find it, I will post back.

EDIT Also check out SI4599. It is a dual N and P chan. I got them on Ali for $0.83CDN each.

https://amz.run/96x5

Here is the Ali link for the dual https://www.aliexpress.com/item/33010369472.html?spm=a2g0o.order_list.order_list_main.116.15941802Rb4LSL

Finally i have found

* AOI4185 or AOTF4185 with 20 mOhm @ -4.5V Vgs, suitable for up to -40V Vds

* AOI409 or AOTF409 with 55 mOhm @ -4.5V Vgs, suitable for up to -60V Vds