Hi.

Well I was not sure exactly how to name the thread. But here Goes.

I will try to keep this simple.

Problem and Application :

I have a Reciever Module and Sender Module in one of my projects.

One wire from the Sender sends a very small +12v constant current to the reciever to trigger it to perform a function. I had to replace the reciever unit with a new one, but now does not take a +12v current on that same wire, it works on earth trigger, so it will not do anything if that +12v current is fed to it.


Proposed...

Re: Nichicon HE, PW, PS, BT ? to replace bad HT Ser

Ah I see, so the other components in the circuit are made to work with a cap with a certain Ripple current and resistance rating, And if going out of that threshhold that those other components are designed for then it's bad.... I had read some documents from a cap manufacturer that replacing a cap with lower ripple current rating with higher one is fine, i guess not??

So in this case is it best to stick within the window of what was in there from factory?
How much can it deviate by? e.g Original is PR.........

Re: Nichicon HE, PW, PS, BT ? to replace bad HT Ser

Writing this in a hurry.... actually the ECU is inside of the Cabin so won't be subject to engine bay heat.... nonetheless do you still recommend PW for weather reasons?

As for the impedence, I thought lower impedence is always better e.g a lower impedence cap can replace a higher impedence cap in pretty much all applications without ill effects or is this not true? I thought the impedence of a cap just contributes to heat and aging thus possibly creating problems in operation......... so lower impedence would always...

Re: Nichicon HE, PW, PS, BT ? to replace bad HT Ser

Thanks for the detailed reply Pete yeah I too thought PW or HE, HE first and PW if I cant find what I need in the HE series.

The ECU's are sometimes for other countries, Australia where it rarely gets below 0 degrees C but have very hot summer days yes so in that case what would you recommend?

I take it we have narrowed it down to HE or PW but keeping in mind the weather which would be better?

still keeping in mind the weather .... but on the other hand, would the HE be better in terms of...

Hi Guys,

I've just signed up after searching on google.

Has anyone seen failures in around 1990's Nichicon PR Series Capacitors?

But not limited to PR. I replace Capacitors in Toyota Engine Control computers that are around the year 1990 of a certain model that has many defective capacitors, and many of these cars some having done quite low KM's have failed capacitors, most if not all leaking from the base. I have been told it's due to age but there are other cars with much higher KM using different capacitors that have not failed..... so I'm suspecting...