Identify Cap Manufacturer from Symbol

[stj]

Re: Identify Cap Manufacturer from Symbol

bi-polar are physically bigger and dont perform so well.
these days you can use a polyester or polypropylene cap instead.

[tjg79]

Re: Identify Cap Manufacturer from Symbol

bi-polar are physically bigger and dont perform so well.
these days you can use a polyester or polypropylene cap instead.

Not in all cases. When I was searching for caps on the Mouser Electronics website, and applying the parameter filters (connection, capacitance, voltage, tolerance, temperature, size, etc...), to include cap diameter and length, in at least two cases, the only options presented were for bi-polar caps.

I ordered a few, so I'll find out if they work or not.

[stj]

Re: Identify Cap Manufacturer from Symbol

did you look at the ripple voltage?

[tjg79]

Re: Identify Cap Manufacturer from Symbol

did you look at the ripple voltage?

I think they may have listed ripple current, but no, in this particular case, I didn't look at ripple voltage. I don't recall seeing a ripple voltage spec. I'm going to give them a try to see what happens.

In general, when my filter parameters resulted in four or five choices, in some cases there was some variation in ripple current, but I wasn't sure what cap was the better choice. Is highest ripple current always the best choice? I don't know. I suspect not, because the best choice, in my opinion, would be the replacement cap that most closely matches the original cap specs.

[stj]

Re: Identify Cap Manufacturer from Symbol

i meant current - sorry
it's the amount of current the capacitor can store

[Behemot]

Re: Identify Cap Manufacturer from Symbol

What does that mean? How can you store current?

[stj]

Re: Identify Cap Manufacturer from Symbol

because it's a capacitor - it has capacity.

the current capacity is the current it will draw from a discharged state and the initial current it can discharge at.

[tjg79]

Re: Identify Cap Manufacturer from Symbol

because it's a capacitor - it has capacity.

the current capacity is the current it will draw from a discharged state and the initial current it can discharge at.

That's not the ripple current.

[Behemot]

Re: Identify Cap Manufacturer from Symbol

You store energy at the form of electric charge. The capacitor can provide maximum current which is basically equal to the amount of this stored energy/voltage and it's internal resistance (ESR). But that is basically shortcut current, which is by no way ripple curent…