26389Views8Replies

Author Options:

Can I substitute capacitance on replacement capacitors? Answered

I am trying to fix an IBM LCD monitor and even though I took electronics in high school and have replaces caps before I am not up on electronics enough to make design decisions. So, I would like to know or double check what an electronic supply store person told me which is that a 820uf 25v capacitor is replaceable with a 1000uf 25v capacitor. If the circuit being used on has an impact, these 3 caps sit on what  appears to be on or directly related to the power supply circuit as it is on the board that the power connector and transformer sits on.

Discussions

0
None
InfoS1

8 months ago

Can I substitute from 470muf 25v capacitor to 470muf 16 volt??

0
None
ChristopherD100

2 years ago

Hello, I'm trying to fix my Acer LCD Monitor.
two capacitors were busted, and I cant find any replacements on electronic shops nearby..
Can I substitute the busted capacitors 150uF 25V with a 220uF 25V??..
The busted caps are on the power supply board on the LCD Monitor..

0
None
GeorgeR61

2 years ago

Trying to replace capacitors in my Samsung TV - Can someone please verify I have sufficient replacements for the following 2 caps:

Original --- Replacement:

1. 470uf/10v/105° --- 470uf/25v/105°

2. 1000uf/25v/105° --- 820uf/25v/105°

0
None
Re-design

6 years ago

In a power supply the 1000 uf cap would probably be a good sub for the 820.

0
None
Richman1Re-design

Answer 6 years ago

I heard it said you can go up in voltage rating also but can you do both. Say a 1000uf 35v cap. Also I have found some locally that are 80 degrees. does the temp. have to be the same at the original which I think are105? Thanks for such a quick reply to all, this was awesome.

0
None
mpilchfamilyRichman1

Answer 6 years ago

Electrolytic capacitors are sensitive to heat. If you had 105 degree rated caps before and you replace them with 80 degree caps those new caps will not last very long. Over time the electrolytic material in the cap dries out. This happens much faster if the cap is in a very hot environment. Caps that are rated for higher temps are made to withstand hotter environments and last in those environments. So when i doubt always go with higher values.

0
None
steveastroukRichman1

Answer 6 years ago

I'd always replace the same temperature rating.

0
None
mpilchfamily

6 years ago

As a general rule you can always go up to the next highest capacitance rating as long as the voltage tolerance is the same or better.