I found following component but don't know what it is. In particular what does the ΩJ unit mean?
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10\$\begingroup\$ the J is likely a separate symbol, probably referring to tolerance. \$\endgroup\$– HearthFeb 18 at 14:36
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2 Answers
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That's not J for joules. It's probably J for 5% tolerance. The component is just a 10 mΩ resistor with a 5 W rating.
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2\$\begingroup\$ Probably we have a dupe somewhere on the site for this kind of code, but I wasn't able to turn it up with a bit of searching. \$\endgroup\$– hobbsFeb 18 at 14:37
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"J" means a resistor value tolerance of +/- 5% as per this site.
The resistor in question has a value of 10 milli-ohms (\$m\Omega\$).
It also applies to capacitors as per this wiki site: -
