PCB設計

スルーホールコンポーネントの穴にはどのくらいのクリアランスを含める必要がありますか?

  • 0.1mm is too tight toward the high end if you’re designing for automatic insertion of parts with bent leads.
  • 通常 0.8んん is okay for most leads except fat diode leads, for which you can use 1.0mm.
  • Usually 1.3mm holes are specified for 1mm pins (for example on terminal block datasheets).
  • Sometimes 1.5mm which is really, really loose.

If the leads are flat or square rather than round, you can go a bit tighter on the diagonal dimension, assuming a round hole. For really flat leads, it’s better to specify a slot.

If you’re using some kind of special part, such as a staked connector or press-fit part, pay attention to the tolerances.

続きを読む: スルーホールPCBアセンブリ

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