How do I know if I need a Common Mode or Differential Mode filter?
First, look at the interference. Is it between the power lines and the ground? That is Common Mode. Is the noise just between the two power lines? That is Differential Mode.
In real life, you usually have both types of noise. So the best choice is a filter that stops both. You can use a testing tool, like an EMC tester. It will tell you exactly what kind of noise you have. Then you can pick the perfect filter.
The filter burned out or isn’t working. Did I pick the wrong one?
Should I buy an AC or DC filter?
Does the current size matter? Can I pick a big or small one?
Can I connect many machines to one filter?
My filter broke under warranty. How do I get it fixed?
How can I make my filter last longer?
My filter sat on a shelf for a long time. Is it safe to use?
How do I know if a filter is dead?
The filter makes a humming or buzzing noise. Is that bad?
Where should I install the filter?
The wait time is 45 days. I need it sooner!
Repairs cost too much money. How do we fix this?
Customers say we are the same as everyone else. How do we stand out?
The customer installed it, but the noise is still there.
Material prices keep changing. It’s hard for small companies to buy.
Custom orders are hard to make.
Big orders slow down our delivery. How do we fix this?
Custom molds cost too much money.
The filter dies without warning. How can we predict it?
There are bubbles in the glue and it leaks.
Should I fix the part or replace the whole unit?
The machine stopped! I need a quick fix.
The filter has no power output. Why?
The filter is hot. Is 60°C okay?
How do I share the load between many machines?
Where is the best spot to install it?
How do I choose for High or Low frequency?
My environment is wet and hot. What do I need?
Can I bundle the input and output wires together?
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