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Audio and Video Talk
The Vintage Audio Section
NAD 3020 series 20
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<blockquote data-quote="samuelg" data-source="post: 1159349" data-attributes="member: 28179"><p>You can indeed. </p><p>Resistor power ratings are surprisingly tricky specs it turns out.</p><p>If you look at the same physical size resistor as your 1/4W you'll often find resistors rated at 600mW. It's not that they're better able to dissipate heat, it's just that they have a lower temperature coeffient and can run hotter before departing from its tolerance spec. </p><p>Then you'll find resistors of almost identical size that have different power ratings despite no other clear observable difference. Here's an example. Same vaue. Same size within 0.5mm. Same manufacturer. Same tolarance. Same tempco. Same material. No idea how one resistor has twice the power rating of the other:</p><p>[URL unfurl="true"]https://www.digikey.com/en/products/detail/stackpole-electronics-inc/CF14JT1K00/1741314[/URL]</p><p>[URL unfurl="true"]https://www.digikey.com/en/products/detail/stackpole-electronics-inc/CFM12JT1K00/1741880[/URL]</p><p>Go figure, the simplest components can turn odd.</p></blockquote><p></p>
[QUOTE="samuelg, post: 1159349, member: 28179"] You can indeed. Resistor power ratings are surprisingly tricky specs it turns out. If you look at the same physical size resistor as your 1/4W you'll often find resistors rated at 600mW. It's not that they're better able to dissipate heat, it's just that they have a lower temperature coeffient and can run hotter before departing from its tolerance spec. Then you'll find resistors of almost identical size that have different power ratings despite no other clear observable difference. Here's an example. Same vaue. Same size within 0.5mm. Same manufacturer. Same tolarance. Same tempco. Same material. No idea how one resistor has twice the power rating of the other: [URL unfurl="true"]https://www.digikey.com/en/products/detail/stackpole-electronics-inc/CF14JT1K00/1741314[/URL] [URL unfurl="true"]https://www.digikey.com/en/products/detail/stackpole-electronics-inc/CFM12JT1K00/1741880[/URL] Go figure, the simplest components can turn odd. [/QUOTE]
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Audio and Video Talk
The Vintage Audio Section
NAD 3020 series 20
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