I have a training panel for S-300 siemens PLC. The power supply has a broken 24V line. There's a fried tantalum capacitor and there's no similar one in the warehouse.
My question is that can I replace this capacitor with 10uF electrolytic one ?
How did you burn the tantalum cap?
Are you expecting this condition to happen again?
What was the C, V rating?
What is the lowest DCR load? and freq?
You should never exceed 10% of V rating in reverse and expect it to survive.
This does not explain all, it explains capacitance change over time, and that's it . It does not explain ESR, ESL, tan delta, reverse voltage tolerance, capacitance vs. voltage or temperature, leakage current...
There are a lot of advantages of Tantalum over aluminium electrolytic capacitors such as smaller size, higher frequency response, capacitance stability and low ESR etc, however in your application I expect that a aluminium electrolytic will work just fine.
How did you burn the tantalum cap?
Are you expecting this condition to happen again?
What was the C, V rating?
What is the lowest DCR load? and freq?
You should never exceed 10% of V rating in reverse and expect it to survive.
With connections through long thin tracks as shown in the photograph, I wouldn't think ESR was considered particularly important in this application. I've had tants blow up for no apparent reason and some when there has been instability on the supply line. Given the circumstances I would expect a normal wet electrolytic to work just as well, if in doubt, wire a 100nF ceramic across it to keep the total impedance lower.
Are there electrolytic capacitors within ceramic capacitors values?, I mean is the ceramic capacitor is 10uf?, value important, so where the electrolytic capacitors with ceramic value?
I have a training panel for S-300 siemens PLC. The power supply has a broken 24V line. There's a fried tantalum capacitor and there's no similar one in the warehouse.
The LM2408 is a CRT driver, not a regulator. Do you have the right part number that
24 Vdc is going to ?
ESR major attribute of a bulk cap :
Designers, in general choose components and their technology for a reason.
So guessing on substitution can be the difference between " I know for a fact"
versus "I think it might". Also if its handling a lot of switching current can
cause excess heating of cap using one with higher esr......
Other considerations, if this is a life support or safety piece of gear I would take the
safe route.....
This does not explain all, it explains capacitance change over time, and that's it . It does not explain ESR, ESL, tan delta, reverse voltage tolerance, capacitance vs. voltage or temperature, leakage current...
Sorry, but that's totally wrong. You said "this explains ALL". If your only concern is capacitance shift over time, that's a pretty naive approach to picking a capacitor. Of all the characteristics of a capacitor, that's way down on the list of importance.
Sorry, but that's totally wrong. You said "this explains ALL". If your only concern is capacitance shift over time, that's a pretty naive approach to picking a capacitor. Of all the characteristics of a capacitor, that's way down on the list of importance.
I have a training panel for S-300 siemens PLC. The power supply has a broken 24V line. There's a fried tantalum capacitor and there's no similar one in the warehouse.
How did you burn the tantalum cap?
Are you expecting this condition to happen again?
What was the C, V rating?
What is the lowest DCR load? and freq?
You should never exceed 10% of V rating in reverse and expect it to survive.
The board in the picture is a working board, the second board has a burnt area, and the person who wanted to fix the board didn't know how to fix it correctly and passed the board to me. And I made a mistake and soldered the -ve of the capacitor to the wrong area and it went into flames as soon as I plugged in the mains plug.
So I found it on Aliexpress, it's 10uF 35V tantalum cap.
Absolutely, electronics isn't simple field of engineering just like any other field in life, every thing is selected and confirmed for a reason.
So guessing on substitution can be the difference between " I know for a fact"
versus "I think it might". Also if its handling a lot of switching current can
cause excess heating of cap using one with higher esr......