need to know what c4106 is..

[droid]

i managed to blow up my old pc power supply..
i opened it up and found that 2 (most likely) transistors cracked open, both were attached to heatsinks..
it was made by delta electronics..

i searched around the web but couldn't find anything, and then i found this site..

so i was wondering if any one here knows what the c4106 is.. is it a power transistor? if so, npn or pnp, also power/voltage/current rating.. its in a to220 packaging...

thanks a lot

 

[Chippie]

Your c4106 is actually a 2SC4106, which is a 7 amp rated NPN switching
transistor in a T0220 package,with Vce rating of around 400v and a dissipation of 50watts.........


Equivalents are: 2SC4242 or MJE13007

more than likely if they have blown, then you may have damage to the secondary side mounted components like the rectifiers, worth a check.......

What generally happens is the transistors run in a start up mode, and unless the secondary supplies are established, are free running, at a frequency that is not their normal frequency. they become too hot and fail......The frequency of the supply is generated by a pwm controller usually something like a TL494, whose supply is generated from the secondary of the transformer......

Good luck reparing it..... 8)

 

[droid]

ok thanks!
nothing else seems damaged.. the other mounted components look fine..
what happened was the psu was set to 110V and i plugged it to a 220V mains.. stupid me!

 

[Sebi]

Check the bridge rectifier, the serial 1...3ohm 5W fuse-resistor and two driver transistors (some TO92 e.g.C940).

 

[droid]

what type of fuse is used on this psu? its similar to a glass fuse except instead of transparent, its white...

 

[Sebi]

Yes, it's a slow-blow fuse, but mostly faster blow-out the serial ceramic 1...5ohm resistor. (it contains inside also a fuse-wire)

 

[droid]

can u post a picture or link the serial ceramic type? not familiar with that

thanks