Questions tagged [electrolytic-capacitor]
An energy-dense polarized capacitor type, used in low-frequency filtering applications.
374
questions
0
votes
0
answers
76
views
Is a choke required on power supply input, 50 Hz single-phase 230 VAC
I have a 2 kW 20 kHz ultrasonic power supply which trips input power when I turn it on.
I disconnected the choke between the diode bridge + and capacitor +, and connected from the bridge to the ...
- 96.8k
1
vote
1
answer
99
views
Why does this Zenith Phonograph schematic separate electrolytic and fixed capacitors
I'm currently in the process of restoring a 1960's phonograph made by Zenith. My plan is to replace all the capacitors among other things. I have the original schematic, purchased from Sam's Technical ...
- 159k
3
votes
2
answers
225
views
What is the current when the capacitor terminals are connected?
I need to know the current in a polarized electrolytic capacitor.
What is the practical limit for this current and how do I calculate?
I want to know what is the maximum current I can get when I put ...
- 618
8
votes
1
answer
417
views
How to estimate electrolytic capacitance from foil area
I opened a failed 1000 μF electrolytic capacitor. It contains 2 foils coiled with paper and some wet dielectric.
With reasonable assumptions (to me), I can not derive marked capitance from this ...
- 9,270
4
votes
2
answers
25k
views
How can I determine the current rating of a capacitor?
I haven't seen any capacitor with the "Ampere" rating written over its body. Usually they have max. voltage and capacitance ratings, can i know "current" rating from both values?(Supposing AC voltage)
...
- 103
1
vote
0
answers
133
views
Tantalum capacitor at low temperatures
What could happen to a solid tantalum capacitor that operates below the lower temperature range defined by the manufacturer (-55°C)?
From my understanding, there would be a performance issue with ...
- 9,270
11
votes
1
answer
1k
views
Do electrolytic capacitors lose lifetime during soldering in reflow oven?
Electrolytic capacitors service time is based on maximum operating temperature, among other things. When they are inside an SMD soldering oven, the temperature increases to over 375°C. Most of the ...
- 159k
9
votes
4
answers
6k
views
Using capacitors as a battery back-up
I have a device which is operated from a 12 VDC 10 A power supply and draws 8 A in operation.
I need to run this device for at least 20 seconds when the 12 V power supply is lost upon a power failure. ...
- 169k
6
votes
1
answer
259
views
Why is this circuit drawing excessive current (Suspected culprit: Large capacitor on switching DC-to-DC Converter Output)?
On a PCB of mine I'm employing two ADP2504 Switching DC-to-DC Converters (one fixed version outputting 3.5V and one adjustable version set to output 4V) which have their inputs connected to the output ...
- 11.6k
2
votes
0
answers
72
views
Do I need to insulate the case of an electrolytic capacitor from ground? [duplicate]
I'm designing a motor controller, and I'm trying to understand if I need to add insulation between the case of the bulk input capacitors and the grounded aluminum heatsink. I know that relying on the ...
- 237
0
votes
2
answers
89
views
Need some help with electrolytic capacitors
I am restoring an old 1960s Sanyo reel to reel tape recorder, replacing most bad electrolytic capacitors.
On the preamplifier there are ten Rubycon 6.3V 4.7uF electrolytic capacitors. I assume it is ...
- 72.5k
1
vote
1
answer
108
views
How to visually distinguish metal film and ceramic capacitors (leaded)?
This question only involves the leaded components.
Electrolytic capacitors are each to recognize since they are usually in cylindrical cans. However, I am not sure about distinguishing the other two ...
- 39.6k
14
votes
5
answers
3k
views
What is the purpose of an electrolytic capacitor in this small electronics project?
As someone trying to learn electronics, I found the following diagram where there are these two electrolytic capacitors (470uF).
Could someone explain the use of these components? How does the number/...
- 39k
2
votes
2
answers
3k
views
How to replace electrolytic capacitors with non-electrolytic ones?
I've a little project and want to make a PCB for it, as small and thin as possible, but the electrolytic SMD ones are bigger than I wanted. With that I faced a small problem that led me to a question ...
- 72.5k
22
votes
7
answers
6k
views
Why are electrolytic capacitors still in production?
What are the advantages of using electrolytic capacitors?
I know in the past electrolytic capacitors would have more capacitance, but with Multi-layer ceramic capacitors (MLCC) they seem completely ...
