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Help identifying SMD fuse fusible link
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davec
Wed, 15 Jul 09 20:19:02 +0000


At first glance it looks like a 2-terminal SMD device. But there's
what looks like side terminals that AFAICT are not soldered to the
PCB. (Or am I mistaken about that?)

Silkscreen says "FS1234" or such. These are on a mini Intel motherboard.

Fuse? Fusible link? Or...?

Thanks,
Dave

2 replies folowing
davec
Wed, 15 Jul 09 20:22:20 +0000


Oops... there's a huge trace running underneath the middle of each of these.

So I guess these *are* 3-terminal devices. What are they?

Thanks,
Dave
dicsEE
Wed, 15 Jul 09 21:21:11 +0000
 
Stefan Trethan
Wed, 15 Jul 09 21:21:11 +0000
I'd guess these are ceramic filters, like the three pin throughhole
parts you can buy just SMD. I haven't encountered them in SMD before
so this is just a guess.
The thick trace would be ground then.

By the way one of the strangest components may be the remote control
fuses. It's a little SMD fuse with two more terminals which connect to
a heater resistor on the same SMD part. You can actually trigger the
fuse by applying current to the other two terminals. The natural
habitat of that rare creature is lithium ion protection circuits.

ST

On Wed, Jul 15, 2009 at 10:22 PM, davec wrote:

>
>
> Oops... there's a huge trace running underneath the middle of each of these.
>
> So I guess these *are* 3-terminal devices. What are they?
>
> Thanks,
> Dave
>
>