equivalents, or also suited components, for dummies

[5inc]

I know it's a dumb question and that google is my friend, but I have no studies in the matter and I'm not the most sociable person either, really. :roll:
I looked into threads like ""Transistor equivalents" By mickthemend in forum Service Manuals, Requests, Repair Tips (Replies: 3 - Last Post: 20th February 2013, 05:37)" , and saw they posted a link to this page https://www.datasheetarchive.com/PC 13003 TRANSISTOR-datasheet.html witch contains three lists.

The first, appears to be a list of different enclosures(?) with their respective reference, seller and "buy" link to buy like 200pieces minimum.
The second, I guess is the equivalent list which in his case, is full of transistors whitc have very similar characteristics.
And the third list is to download god knows what, and i don't think there is a list of equivalents down there.

In my case I have a FQB16N15 N-channel mosfet Q-fet, and the results i get are quite poor, it only gives me the option to buy thousands and it's datasheet, that's something, but I need two, maybe a tenner to have a few lying around. I can't afford to buy 200 units at .99 to only use 2.
I have found on other pages, that also link what appear to be similar ones, but some have significant differences, and i'm not sure of whitch ones i have to be aware of, I chose two, FQB46N15, and FQB16N25, since the first of them appears to have a higher "drain current", "single pulsed avalanched energy", "power dissipation" and other things according to the original, while the second, is closer to these values, but has a drain source voltage of 250v.
So with the first you get higher amperage, and the second higher voltage.

What do you think is safer?

I'ts for an enormous LED TV I found in the trash, if it has any relevance.
Thanks in advance

 

[KlausST]

Hi,

First look for the original device.
Then look at the manufacturer internet sites. Look for the original device, and if there are any replacement recommendations.
Then look at the manufacturer internet sites look for tables with similar devices and find one with specifications close to the original one.
Then look at other manufacturers for similar devices.

Don't look at dubious internet sites. Save your time and money. Look at reliable sites.

Klaus

 

[5inc]

Hi klaus,

after a late night and half a morning of research i couldn't find an official webpage or it's manufacturer.

What I did find instead is a 10x package for sale on alibaba of the same mosfet, only in a different package, a bigger one (FQP16N15). The original was one of those tiny smd mount transistors and this is a good old regular sized transistor, for about 7$ shipped, that's something I CAN afford, but before ordering it I would like to have a second opinion.

the original is FQB16n15 smd mount type (unavailable)
http://pdf.datasheetcatalog.com/datasheet/fairchild/FQB16N15.pdf

The replacements I think could work(comparing datasheets) AND also I can get hold of are:

the same transistor in bigger casing FQP16N15 (This is my favourite)
http://pdf1.alldatasheet.es/datasheet-pdf/view/52336/FAIRCHILD/FQP16N15.html

a different one with higher drain current, single pulsed avalanched energy and power dissipation (same casing as original) FQB46N15
http://pdf1.alldatasheet.es/datasheet-pdf/view/52176/FAIRCHILD/FQB46N15.html

and the last has a higher drain-source voltage but most other values are closer to original FQB16N25
http://pdf1.alldatasheet.es/datasheet-pdf/view/52135/FAIRCHILD/FQB16N25.html

(I hope the links work, I couldn't get into the www./ links part in the Forum rules & policies (quick reference) announcement by alexan_e. I apologize if they don't)