Help in Idenfifying the correct components from RS online

Thread Starter

Assurance

Joined Jun 9, 2020
5
Hi all,
I need help identifying this Cap

Im trying to replace this capacitor <<<630V, 0.047u , rectangular shape >>>>

will this be an ideal replacement
KEMET RC Capacitor 47nF 47Ω Tolerance ±20% 250 V ac, 630 V dc 1-way Through Hole PMR209 Series
  • RS Stock No. 209-213
  • Mfr. Part No. PMR209MB5470M047R30
  • Brand KEMET

from rs.uk.online,com - https://uk.rs-online.com/web/p/rc-network-capacitors/0209213/
 

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Delta prime

Joined Nov 15, 2019
377
will this be an ideal replacement
Hi there. :) No. You need a polyester film capacitor same voltage or higher same capactence value. Metallized paper capacitors are to be preferred if the capacitor is to be used where uncontrolled transient voltages can occur. It used in a Different application.
 

Ylli

Joined Nov 13, 2015
965
The 0.1 uF cap you pictured is a X2 safety cap. That one is likely across the incoming power line.
Perhaps https://uk.rs-online.com/web/p/polyester-film-capacitors/8741412/ lead spacing 15mm, or
https://uk.rs-online.com/web/p/polyester-film-capacitors/8741437/ lead spacing 22.5mm

As for the 0.047, that appears to be a standard poly cap. There are a number available, with different physical sized and lead spacing, you will have to look.
https://uk.rs-online.com/web/c/passive-components/capacitors/polyester-film-capacitors/?applied-dimensions=4293291339,4294463001,4293320475
 
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Thread Starter

Assurance

Joined Jun 9, 2020
5
@ Ylii, Thanks

Find attached better pictures Top and Bottom for FX0-Power JY331C7 8501B
some caps are bad i.e.
C5 - 630v, 0.047u,
C100- 400v, 68u
also some Resistors:
Resistor R18
Resistor R5
Thermistor (TH) 10D9 - not sure if this is NTC/PTC
I need help identifying correct component from uk.RS-online
 

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Ylli

Joined Nov 13, 2015
965
1. You are working on a switching power supply, likely driven directly from the line. These can be dangerous to work on if you don't know what you are doing.
2. Seem to be a lot of parts that have been overloaded/burned. Fixing this board is going take considerable effort, even if you were intimately familiar with it.
3. The resistors are obviously burned, the thermistor may or may not be bad, but why do you think the caps are bad?
4. For your own safety, I would recommend that you replace this board, or turn it over to someone who is familiar with troubleshooting/fixing Switch Mode Power Supplies.
 

AlbertHall

Joined Jun 4, 2014
10,068
5. If you don't find and replace all the faulty components - not just the obviously burnt ones - then when you power it up again it may well go bang again.
 

Thread Starter

Assurance

Joined Jun 9, 2020
5
@Ylli , thanks
The Caps are bad because they have obviously swollen and im positive if I can get the correct component replaced , the whole circuit will come alive again. this is my view

and I've found these to replace the bad cap C5 - 630v, 0.47u

Panasonic 47nF Polyester Capacitor PET 630V dc ±5%, Through Hole
  • RS Stock No. 622-4937
  • Mfr. Part No. ECQE6473JF
  • Brand Panasonic
<<<https://uk.rs-online.com/web/p/products/6224937/>>>

-OR-

NISSEI 47nF Polyester Capacitor PET 630V dc ±10%, Through Hole
  • RS Stock No. 183-3242
  • Mfr. Part No. MMX0630K47300000000
  • Brand NISSEI
<<<https://uk.rs-online.com/web/p/products/1833242/>>>

I need advice on which one to choose
±10% or ±5% ?

@AlbertHall - Thanks , I now found the one for a DC since this is on the DC side
 
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