0
\$\begingroup\$

I have these capacitors and want to use them for the Y-caps of a CM-EMI filter.

I know the first one is undoubtedly suitable for my application as all information such as Y and X safety classes are printed on it, but I'm not sure about the second one. Is this the same type of capacitor as the first one? Can I use it as Y-cap in the EMI filter? Are ceramic capacitors and lenit capacitors the same?

enter image description here

enter image description here

\$\endgroup\$
2
  • 1
    \$\begingroup\$ Don't do it. Without the safety lab certifications (i.e logos on the device), you're in a legally indefensible position should somebody get hurt. \$\endgroup\$
    – Kyle B
    Commented Oct 19, 2022 at 22:41
  • 1
    \$\begingroup\$ "back in the day", they used to use standard Electrolytic capacitors to tie a live line to ground. Meaning you were one failed piece of wax paper away from an electrically live chassis. They are called a "death cap" for a reason (you can google that phrase and find out all about it.... The capacitors, not the mushroom LOL) i.e. robrobinette.com/Death_Cap_and_Ground_Switch.htm \$\endgroup\$
    – Kyle B
    Commented Oct 19, 2022 at 22:43

1 Answer 1

Reset to default
8
\$\begingroup\$

hm, safety critical application, but component of unknown origin with uncertain characteristics: Just don't.

There's no good reason to use an unknown component in a place where failure can lead to electrocution or fire.

\$\endgroup\$
1
  • 1
    \$\begingroup\$ If you've really gone to the effort and cost of implementing class X or class Y design, you'd make very sure you'd print it on the case. You might also get fraudsters adding it to unsuitable caps. But if it's not printed on it in any way assume not. Class X and Class Y generally requires a different design, not only a certification process, so they're not going to be "accidentally" suitable either. \$\endgroup\$
    – Dannie
    Commented Oct 19, 2022 at 11:33

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.