Electronics > Projects, Designs, and Technical Stuff
Can I use a normal Ceramic cap instead of this cap
ali_asadzadeh:
Hi
I want to replace this new 1nF 1Kv 0805 cap for several reasons instead of the Y capacitor in a 10W fly-back design
Exactly replacing the CY1
I'm currently using this part from TDK
https://lcsc.com/product-detail/Others_TDK-CK45-B3AD152KYVNA_C342400.html
But I prefer to use a 0805 version like this one
https://lcsc.com/product-detail/Multilayer-Ceramic-Capacitors-MLCC-SMD-SMT_Walsin-Tech-Corp-0805B102K102CT_C303890.html
Can I do that?
Any reason not to use this SMD version?
JackJones:
Y-capacitors are designed to fail safely. They fail open, not short. With a standard ceramic capacitor you don't have such guaranteed failure modes. That is why you shouldn't replace Y-capacitors with any other type.
ejeffrey:
In addition to the fail safe behavior of Y capacitors (which is the primary issue in this case) the smaller surface mount package likely doesn't meet clearance or creepage requirements for mains voltage.
Siwastaja:
Please stop before you kill someone. You are not up to this task. This is really a life-critical component. People have been actually killed by this exact design inability.
Look for expert help in designing this.
ali_asadzadeh:
Thanks, My problem with this cap is it's height! I want low profile version, what about two series cap? or do we have a low profile version, something under 6mm!
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