Mosfet ?

[colormebad]

Anyone know a sub part for this transistor ---> 16NF25
Has a big ST stamped at the bottom.... thanks

[ReeceyBurger123]

Re: Mosfet ?

https://cdn.badcaps-static.com/pdfs/...46ca16067a.pdf

[Alastair E]

Re: Mosfet ?

Why not just get the right one...?

Its not like its some oddball type by some weird far-eastern maker....

ST micro well known popular American maker...

[ReeceyBurger123]

Re: Mosfet ?

I agree just because its failed does not mean its a bad series etc. Transistors tend to blow after they fatigue over time its normal.

[Alastair E]

Re: Mosfet ?

Aye-- Normal since the Effin' Greenies took Lead outta 'em!!

NASA will not use Any 'RoHS' parts in anything they need to rely on for some years Medical and Military gear is also exempt from RoHS Directive--Gotta say summit--innit!...

[stj]

Re: Mosfet ?

fuck lead, just use decent solder wih good flux in it like kristall505 or hs10

bitching about RoHS is just an excuse to buy cheap crap on ebay instead of investing in decent solder

[Alastair E]

Re: Mosfet ?

fuck lead, just use decent solder wih good flux in it like kristall505 or hs10

bitching about RoHS is just an excuse to buy cheap crap on ebay instead of investing in decent solder

Err--

You are Completely Missing the Point!!

The MOSFETS/Parts Themselves have internal soldered parts like the Die or chip thats Soldered to the tab or substrate--Now by RoHS lead-free Crap!!

Bitching about the quality of the solder used to replace the complete assembled TO220 or other package is gonna be like closing the stable After horse has Long Gone!!

Its whats INSIDE the parts that matters!!

BTW--

I Will Not use lead-free solder at all, so dunno what the wise crack about using cheap solder off ebay was all about....

[stj]

Re: Mosfet ?

the wisecrack about cheap solder was refering to chinese leaded 60/40 on ebay with no details about flux formulation etc.
the chinese are offloading it because they have stricter RoHS rules than we do!

component wires are bonded to the die, not soldered btw.

[Alastair E]

Re: Mosfet ?

And the Die--Often the Drain in MOSFETS is Soldered to the Tab or Substrate which forms the connection to outside world....

Two welded and One Soldered connection. Its Metal Fatigue due to expansion/contraction cycles that kills 'em. Google for RoHS and the NASA report, tells it all.

[stj]

Re: Mosfet ?

i dont need to google anything,
i'v been watching the situation since it was just an idea and not a regulation.
it's all down to the flux, it was the development of new fluxes that held it back for so long.

that's why i tell people not to buy solder just based on the metals, but to pay attention to the flux formula - and if it's not detailed then dont buy it.

[Alastair E]

Re: Mosfet ?

Nah--Nowt do do with flux, IMHO....

Its the alloys. Lead--Was there, For a Reason.....

It has been for Hundreds of years in various industries and used since the dawn of electronics till a few years ago, when the most damnable, ill-thought out, stupid, braindead, uninformed, Idiot, Interfereing, meddling Greenie A-Hole Numpties took it away, Curse their eyes!

Flux has little effect on the Metal-Fatigue the joints suffer from inside the die/substrate interface--THAT Fact is down to the metal Alloy Composition--as has been illustrated in the NASA reports you are reluctant to examine....

--Summit is either 'Tinned' correctly--Or Not--which is the purpose of the flux.

A poor alloy (Lead free crap) solder, unequal expansion hot/cold cycling and time does the rest.

IF it was as simple as flux formulation--which you allege has now been cured, then RoHS CRAP would be allowed in Medical and Military, and I doubt NASA would have Any problem in using such parts that are made in accordance with RoHS...

Nah--Keep yer lead-free rubbish, I'll use Proper Leaded Solder and Tried and tested Rosin based fluxes thanks!
--IF I had a choice--I would use all NON RoHS parts too, sadly this isn't possible anymore.

[stj]

Re: Mosfet ?

IF it was as simple as flux formulation--which you allege has now been cured, then RoHS CRAP would be allowed in Medical and Military,

it is.
there is no ban on leadfee solder being used in medical / defense equipment.
they are just exempt (so far) from being fined for using lead or cadmium.

unlike you or me - if we use lead while making something new to sell or for repairing something that was RoHS compliant we can get fined upto 50,000
and they DO enforce that!

[Alastair E]

Re: Mosfet ?

it is.
there is no ban on leadfee solder being used in medical / defense equipment.
they are just exempt (so far) from being fined for using lead or cadmium.

unlike you or me - if we use lead while making something new to sell or for repairing something that was RoHS compliant we can get fined upto 50,000
and they DO enforce that!

Correct--The Military and Medical are Exempt. They Choose NOT to use RoHS due to the reliability concerns.....
(Due to the reliability issues--This has lead to MORE WEEE in the world to deal with--Rather Counter-Productive to what the Damnable Greenies wanted dont you think!)

BTW--What country are you in that goes to the trouble of checking your repaired work for RoHS Compliances?
--Europe is a Big place!

[stj]

Re: Mosfet ?

u.k. right now,
and they do random checks on repair shops in London - because they would love to get some cash from people.
it's always about the money - like police pulling people over using a bullshit excuse just so they can check tread wear, rim damage etc.

[Alastair E]

Re: Mosfet ?

Interesting....
Glad I'm in Welsh-Wales then!

Do you know anyone personally that has been prosecuted and ACTUALLY fined for using leaded solder to repair an item made post 2006, and NOT just rumor mongering in workshops on coffee breaks. (Lets face it--That happens a LOT)...?

The Maker can use up to 0.1% By Weight of finished Product of a RoHS applicable Chemical--Such as (In this example,) Lead.--And be Fully Compliant. This is quite plain in the RoHS Directive...
Otherwise, they wouldn't have been able to use CCFL tubes in TV sets, due to the Mercury,--another RoHS Chemical....

So--Do the rules say anything on how such analysis of said repaired item would confirm 0.1% by weight of the finished repaired item?

--Seeing only a couple of inches of 60/40, 0.5mm (used for average repair) would be well below 0.1% weight of any TV set! Such an amount of solder weighs less than a gram!
--How much did that plasma you just fixed weigh......

How are they gonna know --beyond reasonable doubt in a Court-- that you used that particular solder, and not some previous repairer--or even the maker....?

Only way to find quantity would be by destructive testing of that device and an elemental analysis done on the ash left to effectively estimate lead contents.....
--Doubt the owner of said repaired item would be too happy with That-

-IF it wasn't a trap item used by whoever polices the RoHS directive in your country!


Ive recently read through the RoHS Directive, didn't say much in the way of repairs--Perhaps you can quote the Chapter, Part, or Annex etc thats listed in, and where it mentions penalties for contraventions? Maybe the version I was reading is incomplete....

Only reference I found to fines was for 5,000 not 50,000 and that was for a Producer who obviously wasn't complying and not for a repairer.
--Maybe its because there are so few repairers left in comparison to 30 years ago.....

[Alastair E]

Re: Mosfet ?

Out of curiosity, Ive emailed the NMRO. Here's what I said--

With regards to Repairs of Electronic Devices made After 2006, is it an offence to use a couple of inches of 60/40 0.5mm Lead-Tin Alloy (Traditional) Solder weighing less than a gram for the repair of an item of many Kg?

(Well within the 0.1% of the limit for lead in a Production environment)

This is for Repairs, and nothing at all connected to Production and placing on the market of a new item.

Thanks,

Al

[Alastair E]

Re: Mosfet ?

it's always about the money - like police pulling people over using a bullshit excuse just so they can check tread wear, rim damage etc.

This, I Absolutely agree with!

There's Nothing done Anywhere in the world that Someone or some organisation doesn't benefit from financially.
--There's Very little selflessness left in society its all What can you do for me, and how can I screw dosh outta you!

A Narcissistic driven society, It'll eventually collapse in on itself, the cracks are plain to see already....

Don't get me started on Motoring issues!!