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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1\$\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\$– DeanJan 16, 2016 at 11:56
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2\$\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\$– user_1818839Jan 16, 2016 at 11:58
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\$\begingroup\$ @Brian They already have a category called "Power Metal Strip / Metal Element". See my answer below. \$\endgroup\$– ArmandasJan 16, 2016 at 12:07
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1\$\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\$– user_1818839Jan 16, 2016 at 12:25
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\$\begingroup\$ @Brian: Do you mean there is no "wirewound" internal, and it is a solid metal one? \$\endgroup\$– divergerJan 16, 2016 at 14:09
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1 Answer
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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:
