I have a building stack of 450G boards that are dead (bulging capacitors), did MikroTik ever resolve this? Do they warranty these things? I don’t mind replacing the capacitors myself, does anyone have a link to the correct ones to use?
Use the same or higher voltage.
old ones appear to be 580uF 6.3V
I actually have a newer board and it appears they changed to 680uF 6.3V
found an old thread that said look for oscon, not an electrical engineer, are there better specs I should be looking at? higher micro-farad, esr?
Anyone have online source they like for the capacitors (US)?
There are two main parameters for CAP. First is ESR (equivalent serial resistance at defined frequency - lower is better), the secon is ripple current (higher is better, generally ripple current increase with capacity).
If its possible to choose 105°C or 125°C design, choose them. The life time will be longer at the same condition than 85°C.
I used for DC/DC convertors Nippon LXZ/LYZ series capacitor in case of trough hole. In case of SMD capacitors seems to be polymer CAP (eg. Sanyo/panasonic/nichicon) good solution. Polymer caps are currently used for e.g. matherboards DC/DC convertors. There is lower capacity, but much higher ripple current.
In many cases I used trough hole cap from nippon instead of SMD - you can solder wires on PCB pad and fix cap eg by thermo-glue. It depends on package and requested value (higher nominal CAP voltage you use and the CAP life time increase)
I’ve used these to repair several rb450’s.
Allied Electronics
Nichicon RS80J561MDNASQ
http://www.alliedelec.com/search/productdetail.aspx?SKU=70188114
Thanks AUG , just ordered a few. Saved me alot of time in looking up all the parameters for replacements.
Deleted because not related.
I’ve replaced the cap’s in about 30 411 boards as well. The ‘green’ caps that were used only seem to fail in the heat of the summer…
They were RB450’s. Not RB450G’s.