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PCB Voltage clearance

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  • PCB Voltage clearance

    Hello Everyone,

    I have a doubt in PCB Trace clearance on different voltage levels. I will calculate the minimum clearance using following website:
    https://www.smps.us/pcbtracespacing.html

    I also use Saturn PCB Toolkit.

    I calculated clearance for 48V and attached the result showing in website.

    I am going to route in a External layer. My doubt is which one I need to choose 0.6mm? or Coated - 0.13mm?

    I can't understand what is Coated? Is it a soldermask applied PCB? Can any one explain this?

  • #2
    I can't understand what is Coated?
    - It is a special cover. From wikipedia:

    Conformal coating material is a thin polymeric film which conforms to the contours of a printed circuit board to protect the board's components. Typically applied at 25-250 μm[1](micrometers) thickness, it is applied to electronic circuitry to protect against moisture, dust, chemicals, and temperature extremes.
    Source: https://en.wikipedia.org/wiki/Conformal_coating

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