Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

SMD Capacitor ID

Status
Not open for further replies.

Bx Bandit

New Member
Hello,
I need to replace a surface mount capacitor that has failed on my boiler PCB. The problem is I have no idea what value it is. It tests o/c Can anyone help please?
 

dougy83

Well-Known Member
How do you know it has failed?

small value capacitors will show as o/c if you use a resistance meter. Borrow a capacitance meter to measure the value (once you've removed it from the PCB)
 

Bx Bandit

New Member
Thank you Dougy, well, the capacitor looks a tad 'fried' as the pcb was exposed to a brief erroneous short if that makes sense. All the others show a level of impedance that varies as they 'fill up'. I take your point about testing it off the board, not sure I can get a cap tester though. is there any way to identify it's value?
 

Nigel Goodwin

Super Moderator
Most Helpful Member
Thank you Dougy, well, the capacitor looks a tad 'fried' as the pcb was exposed to a brief erroneous short if that makes sense. All the others show a level of impedance that varies as they 'fill up'. I take your point about testing it off the board, not sure I can get a cap tester though. is there any way to identify it's value?

You obtain the circuit diagram, or parts list, and read it off that - however, it's EXTREMELY unlikely that you could obtain either of those.

It's also very unlikely that the capacitor is damaged anyway, they aren't the sort of things that are easily damaged in such accidents.
 

Sceadwian

Banned
If the capacitor is damage the only way to find out is from the schematic. If it's not you have about a thousand other components to check.
 
Status
Not open for further replies.

Latest threads

EE World Online Articles

Loading
Top