this post was submitted on 16 Apr 2025
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How come there are components in TO220 packages that supposedly take 100A given their small legs? (programming.dev)
submitted 1 year ago* (last edited 1 year ago) by iliketurtiles@programming.dev to c/askelectronics@discuss.tchncs.de
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Not sure if this is a dumb question but this has me quite puzzled.

The legs on TO220 packages are very small. How is it that there are e.g MOSFETS rated as being able to continuously conduct ~100A? e.g IRF1404Z

From what I understand such large currents need busbars on PCBs and these appear a lot larger than the legs on these components.

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