What is this chip?

All it has written on it is:

- FC (this I think is the manufacturer,

- 9501

- K3303

Using datasheetcatalogue.com and K330, it returns a number of FETs (K3301, 02, 04, 05), but I do not want to assume that this is what the chip is for.

It was pulled out of an old ATX PSU and had a heat sink of 4"x5" steal plate all to itself.

I have tried google, but it has only return street addresses, phone numbers, and other unrelated links.

Reply to
Wayne.
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On Tue, 28 Apr 2009 16:14:51 +1000, "Wayne." put finger to keyboard and composed:

Could it be a 2SK3303 MOSFET? Its manufacturer is identified as "Fuji" by usbid.com.

"9501" could be a YYWW date code.

I'm assuming it has 3 pins.

- Franc Zabkar

--
Please remove one \'i\' from my address when replying by email.
Reply to
Franc Zabkar

Why not ?

geoff

Reply to
geoff

Thanks for that.

Reply to
Wayne.

K330 is also a prefix for other 3 pin chips that are not FETs.

Reply to
Wayne.

Big give-away. 2SK3303 presumably. The Japs regularly don't print the "2S" part of the device number.

Looks to be obsolete but stock is available.

Graham

Reply to
Eeyore

In which case they would have last numbers other than "3" !

Unless they printed K3303 on it just to trick people....

geoff

Reply to
geoff

It's clearly a power mosfet.

Graham

Reply to
Eeyore

"Wayne."

** Makers nearly always put their logos on devices - if there is room.

Very useful to know the various logos, to narrow down your search.

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** The heatsink proves the device is handling lots of power and the 3 legs means it is a transistor or a FET.

The K prefix ( abbreviation of 2SK...) in the number indicates it can logically only be a power FET.

All power FETs have a diode between source and drain pins - so you can tests for this, and the gate pin should be open with respect to the other pins.

...... Phil

Reply to
Phil Allison

Nice little test for mosfets to see if they might still be working. Assuming N-channel as in this case charge the gate positive w.r.t. source with your meter ( it's an enhancement mode Mosfet ) and the device should conduct. Charge the gate negative and it should not conduct ( except for the inverse diode of course ).

Graham

Reply to
Eeyore

Or stick it on a PEAK 3-terminal semiconductor tester and it will check the component type, all the vital signs, pin identification, and characteristics .

.... if for some reason you disbelieve the printed legending.

geoff

Reply to
geoff

Reply to
Wayne.

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