A strange component!

[whiz]

do you know what is that?

it says 7x7 and the second 7 is upside down...it is the biggest smd
on the board and the thiner!

[gg1978]

Re: A strange component!

Looks like a SMT fuse to me... I'm guessing it's by the keyboard/mouse or USB or firewire ports???

[Rainbow]

Re: A strange component!

Should be a poly-fuse that automatically recovers when the short is removed - used mainly for protecting the 5V power on external ports. If it does not conduct, replace it.

[whiz]

Re: A strange component!

it is on a graphics card...is there any way to locate the brand from the 7x7
marking??

thanks guys!!!

[Rainbow]

Re: A strange component!

Then it most probably protects the +5V power for DDC.

[999999999]

Re: A strange component!

If you have a failed polyfuse on a video card, you need to find the failure that caused excessive current through it before bothering to find a replacement.

With only two "7", you may not be able to determine the brand but do you need to? All you really need is to decipher the current rating which "Might" be 7A, or maybe less depending on where it is you might be able to estimate the current in that subcircuit. So once you figure out the current expected and why it blew(?), measure the physical size and compare to the spec sheets at Digikey or wherever you prefer to buy the replacement.

[GtB]

Re: A strange component!

partnumber could be miniSMDC075, max size 4.73x3.41x0.62mm, marking '7'

the 'X' on the part could be Raychems trademark, >< shifted into each other.

Size is called '1812', equivalents are MF-MSMD075-2 or MF-MSMF075-2 by Bourns.