Which Metallized Polypropylene Film Capacitor Should i use ?

takao21203

Joined Apr 28, 2012
3,702
I have X2 capacitors 0.47uF

You can use 2x in parallel for the 1uF so you need 3 pcs

Generally speaking these are TENTA brand yellow X2 capacitors

Also have a lot of ERO capacitors which are good quality.

http://www.ebay.com/itm/6pcs-ERO-X2-capacitor-0-33uF-/132065265858

These are 0.33uF with integrated 100R

Sure metal film capacitors wear out over the years from spikes and surges on the grid maybe you could test them with a DMM that has capacitor tester but might not be able to create same condition as powered up under high voltage.

The parts on the PCB look quite old 20 years or more
 

AlbertHall

Joined Jun 4, 2014
12,637
Sure metal film capacitors wear out over the years from spikes and surges on the grid maybe you could test them with a DMM that has capacitor tester but might not be able to create same condition as powered up under high voltage.
The failed ones I have come across do show a significant loss of capacitance on a DMM.
 

Thread Starter

RickyZA

Joined Jan 13, 2017
18
I have X2 capacitors 0.47uF

You can use 2x in parallel for the 1uF so you need 3 pcs

Generally speaking these are TENTA brand yellow X2 capacitors

Also have a lot of ERO capacitors which are good quality.

http://www.ebay.com/itm/6pcs-ERO-X2-capacitor-0-33uF-/132065265858

These are 0.33uF with integrated 100R

Sure metal film capacitors wear out over the years from spikes and surges on the grid maybe you could test them with a DMM that has capacitor tester but might not be able to create same condition as powered up under high voltage.

The parts on the PCB look quite old 20 years or more
Thanx for the post Takao, ive already ordered the capacitors that Albert linked to me, we've had quite alot of power outages and surges around here for years, im replacing all caps on the board, not going to take the chance, if that doesnt work ill go to the next step. Thanx for the offer though !
 

Thread Starter

RickyZA

Joined Jan 13, 2017
18
The failed ones I have come across do show a significant loss of capacitance on a DMM.
Hey there Albert,

I received the capacitors today, i wanted to ask, which way should i mount them ? I take it i should look at the writing at the top and match it ? Considering the old capacitors on the board, all i do is discharge them with a screw driver and de solder right ? Ive only mounted radial electrolytic caps so hopefully theres nothing really special about these caps ? Thanks man
 

Thread Starter

RickyZA

Joined Jan 13, 2017
18
Discharging is a safe practice.
They are not polarised like electrolytic capacitors so it doesn't matter which way round you fit them.
Thanx man, really appreciate your help, ill probably have to use a rubberized plier to discharge it on the board as the axial mounting wont work with a screwdriver.
 

Thread Starter

RickyZA

Joined Jan 13, 2017
18
Albert Albert Albert ! Man i dont know how to thank you enough, i installed only the two 1uf 250v and 0.47 uf 250v caps and the fridge is back in business ! Thank you man, i owe you !
 
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