v9: replacing fuse ps13

[nickbuhl]

I need a little help identifying this fuse. Its labeled ps13 on my v9's pcb. I found a thread here where someone identified ps13 as having a 400mW rating. But the guy at Altex asked how many amps it was. That I couldn't tell him. He also asked if it was a pico fuse (I guess thats a brand?) He suggested finding the schematics online, but I've never seen any. I figure that sort of thing would be proprietary intellectual property. Can anybody tell me more?

p.s. Power divided by voltage equals current. What voltage goes across ps13? Is this equation still true for fuses, where resistance = 0?

[snakeize]

Fuse ps13 is a 0.4 amp surface mount (smd) fuse.I can't remember the actual length of the fuse but I think its only 1 or 1.5 mm. long,a fun one to replace
You could use a pico fuse with axial leads,.4 or .5 amp, as well to replace it,just be sure the leads don't ground out to something on the board.

[kl1k]

yip - its a 0.4A fuse, not 400mW. Yuo could use any length fuse as long as its the same current rating. you could even use a glass fuse with leads connecting to ps13. with proper insulation of course. its crude but it'll work.

you also won't find the schematics online - afraid those will be very closly guarded.

[oracle_dfx]

p.s. Power divided by voltage equals current. What voltage goes across ps13? Is this equation still true for fuses, where resistance = 0?

It is true power divided by voltage equals current, but fuses are not resistive devices. They are basically "SHORTS" for a circuit with a very low melting point. So if current higher than the fuse rating goes through the fuse, the conductive material melts. This happens mostly when Overloading occurs. ^^