I'm finding a current sensing resistor recently. I find Vishay's SR series, in it's datasheet, it tilted "Wirewound Resistor...". Is this type of current shunt really a wirewound type, but not a solid metal internal?

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    \$\begingroup\$ It could be because its not from a ceramic material like standard resistors. It is made from a piece of wire therefore wire wound. \$\endgroup\$
    – Dean
    Jan 16, 2016 at 11:56
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    \$\begingroup\$ I think it simply inhabits the range of values, power dissipations, etc that are traditionally associated with wirewound resistors. Also it is a half turn of unusually shaped wire... So rather than invent a new category for it, fit it into the best existing one. \$\endgroup\$ Jan 16, 2016 at 11:58
  • \$\begingroup\$ @Brian They already have a category called "Power Metal Strip / Metal Element". See my answer below. \$\endgroup\$
    – Armandas
    Jan 16, 2016 at 12:07
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    \$\begingroup\$ It is not unknown for documentation to lag behind a bit, and this datasheet is from 2011. Only last year I saw an EPCOS datasheet, presumably written shortly after the merger of Siemens passive components with Matsushita's, that referred to the previous short-lived name... cough S&M Components. \$\endgroup\$ Jan 16, 2016 at 12:25
  • \$\begingroup\$ @Brian: Do you mean there is no "wirewound" internal, and it is a solid metal one? \$\endgroup\$
    – diverger
    Jan 16, 2016 at 14:09

1 Answer 1


No idea why it's called Wirewound, but it says clearly in the datasheet:

• All welded construction

• Solid metal nickel-chrome or copper-nickel alloy resistive element

I found this document on the SR product page and it looks like Vishay are contradicting themselves:

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