Component identification help

[Picooz]

Hi, This is my first post I have limited experience in repairing electronic items, but I do enjoy trying to repair them. I am trying to repair a eberspacher heating control and I can not identify a component. I think it may be a capacitor, the markings on the component are 100nt 12v. I am hoping that somebody will be able to help me, I have included an image of the component and the circuit board. The board is not complete as I have taken the transistors off for testing. Cheers Steven

 

[Arouse1973]

Hi Steven, welcome to E.P. It might actually be a surge suppressor and not a capacitor. Is it short circuit? Edit: Or an NTC
Adam

 

[davenn]

hi Steven

yes, looks like a 100n (0.1uF) capacitor
use one the save cap value, doesn't matter if the voltage rating is higher

so is there a reason why you think it's faulty and needs replacing? do you have a capacitance meter?

 

[Picooz]

Hi Steven, welcome to E.P. It might actually be a surge suppressor and not a capacitor. Is it short circuit? Edit: Or an NTC
Adam[/QUOTE

hi Steven

yes, looks like a 100n (0.1uF) capacitor
use one the save cap value, doesn't matter if the voltage rating is higher

so is there a reason why you think it's faulty and needs replacing? do you have a capacitance meter?

Hi, thank you for the quick response, I have measured it with a capacitance meter and the reading is 185nf, could you help me with the type of capacitor it is? Thank you

 

[Picooz]

Hi Steven, welcome to E.P. It might actually be a surge suppressor and not a capacitor. Is it short circuit? Edit: Or an NTC
Adam

Hi, thank you for the quick response, I have checked it for short circuit and it seems fine, I have done capacitance test on it and have a reading of 185 nf. Cheers Steven

 

[Picooz]

hi Steven

yes, looks like a 100n (0.1uF) capacitor
use one the save cap value, doesn't matter if the voltage rating is higher

so is there a reason why you think it's faulty and needs replacing? do you have a capacitance meter?

Hi, thank you for the quick response, I have measured it with a capacitance meter and the reading is 185nf, could you help me with the type of capacitor it is? Thank you

 

[Arouse1973]

Can you point us to where in the circuit this came from?
Thanks
Adam

 

[Arouse1973]

Out of interest does it read anything on a resistance measurement?
Thanks
Adam

 

[Picooz]

Out of interest does it read anything on a resistance measurement?
Thanks
Adam

Hi, yes on a auto range it will gradually climb until it goes out of range. Hope this helps.

 

[davenn]

Hi, yes on a auto range it will gradually climb until it goes out of range. Hope this helps.

yup just proves its a capacitor rather than a resistive device

Hi, thank you for the quick response, I have measured it with a capacitance meter and the reading is 185nf, could you help me with the type of capacitor it is? Thank you

a bit high for a 100n but if it's just being used for power rail bypassing, that doesn't really matter

it's a ceramic style

 

[Picooz]

Can you point us to where in the circuit this came from?
Thanks
Adam

Hi, the component locates in the c2 slot on the board. Cheers

 

[Arouse1973]

Yes I thought it seemed a bit high myself. I have never seen a capacitor with the value marked in Nano Farads and that bulge on the back side is indicative of MOVs, NTCs and PTC. That's the reason I discounted it from being a capacitor.
Adam

 

[davenn]

I have never seen a capacitor with the value marked in Nano Farads and that bulge on the back side

just the lead connection ... common on the older ceramics

 

[Picooz]

Yes I thought it seemed a bit high myself. I have never seen a capacitor with the value marked in Nano Farads and that bulge on the back side is indicative of MOVs, NTCs and PTC. That's the reason I discounted it from being a capacitor.
Adam

Hi, cheers for the feedback, I have found a manufacturer date of 1974 on the board, just for interest.

 

[davenn]

Hi, cheers for the feedback, I have found a manufacturer date of 1974 on the board, just for interest.

no harm replacing that cap, 100nF (0.1uF) are very common
you may have a newer scrap PCB or 2 lying around that you can recover a cap from

 

[Arouse1973]

LOL I was born in 73, that's probably why
Cheers
Adam

 

[davenn]

LOL I was born in 73, that's probably why
Cheers
Adam

you're such a youngin'

 

[Picooz]

yup just proves its a capacitor rather than a resistive device
Hi, thank you for your reply.


a bit high for a 100n but if it's just being used for power rail bypassing, that doesn't really matter

it's a ceramic style

 

[Picooz]

Hi, thank you for the help, I'll get one installed and see how it goes.

 

[Picooz]

no harm replacing that cap, 100nF (0.1uF) are very common
you may have a newer scrap PCB or 2 lying around that you can recover a cap from

Hi, thank you, I'll get it replaced.