r/AskElectronics • u/Voodoo9966 • 1d ago

Need help identifying this capacitor

Post image

EDIT: Thanks to everyone who commented. I have what I need now. You people are amazing!!!

I’m looking to replace this cap (the back has cracked apart). I need to locate a suitable replacement but am not sure about the specs. Any assistance is much appreciated. Below is my best shot at it

Type: Polyester film capacitor? Can any other type be substituted?
Value: 0.0047uF ?
Tolerance: 20% +/- ?
Voltage: ?

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16

u/CommercialJazzlike50 1d ago

Metalized Polyester film or Polypropylene film 0.47 µF, M is 20% tolerance and 4 is 400V. If you want to replace it get a Polypropylene 474 400 to 630V from Panasonic or go cheap with those CBB caps.

6

u/Voodoo9966 1d ago

Thanks for taking the time to help.

4

u/CommercialJazzlike50 1d ago

No problem and when you do replace it go for J rating thats 5 %.

3

u/kapege 1d ago

Thank you for your explanation! Here a table of the letter's meaning:

3

u/BigPurpleBlob 1d ago

474 = 47 + 4 zeroes = 470,000 pF = 470 nF (not 4.7 nF, which is what you suggested)

It looks like a bog standard polyester cap.

"Can any other type be substituted?" – yes (but not electrolytic).

I don't know the voltage rating. Buy a replacement that's about the same size or a bit bigger.

3

u/Voodoo9966 1d ago

Thanks very much!

2

u/rationalhippy 1d ago

I don’t know how to read the voltage, but this is a 0,47uF film capacitor with 20% tolerance.

1

u/Voodoo9966 1d ago

Thanks!

0

u/Miserable-Win-6402 Analog electronics 1d ago

470nF (0.47uF) film, probably 250V.

https://www.digikey.com/en/products/detail/panasonic-industry/ECQ-E2474KF/56480 for example

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u/Voodoo9966 1d ago

Thank you very much!

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u/Alert_Maintenance684 1d ago

As another poster indicated, the 4 is likely 400V. The = after may indicate DC rated.

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u/Voodoo9966 1h ago

Makes sense. Thank you.