{"id":1018,"date":"2016-02-29T22:15:29","date_gmt":"2016-02-29T22:15:29","guid":{"rendered":"\/blog\/?p=1018"},"modified":"2016-11-08T02:38:51","modified_gmt":"2016-11-08T02:38:51","slug":"understanding-resistors-and-temperature","status":"publish","type":"post","link":"https:\/\/riedon.com\/blog\/understanding-resistors-and-temperature\/","title":{"rendered":"Understanding Resistors and Temperature"},"content":{"rendered":"

A resistor’s Temperature Coefficient of Resistance (TCR) tells how much its value changes as its\u00a0temperature changes. It is usually expressed in ppm\/\u00b0C (parts per million per degree Centigrade) units.\u00a0What does that really mean?
\nLet’s use an example: Riedon’s 50 ohm 100 Series precision resistor has a (standard) TCR of 20ppm\/\u00b0C. \u00a0That means its resistance will not change more than 0.000020 ohms (20.1,000,000) per ohm per degree\u00a0Centigrade temperature change (within the rated temperature range of -55 to +145\u00b0C, measured from
\n25\u00b0C room temperature.)
\nAssume our resistor is in a product that heats up from room temperature to 50\u00b0C. To find our 50W\u00a0resistor’s (maximum) change caused by that 25\u00b0C rise, multiply 0.000020 times 50 (the resistor value)\u00a0times 25 (the temperature change.) The resistor’s value would change no more than 0.025 ohms.\u00a0(0.000020 X 50 X 25 = 0.025W.)
\nThe actual change may be much smaller, depending on the specific characteristics of that resistor. If you\u00a0must guarantee a smaller resistance change in your application, Riedon can provide a nonstandard TCR as\u00a0low as 1 ppm\/\u00b0C.<\/p>\n","protected":false},"excerpt":{"rendered":"

A resistor’s Temperature Coefficient of Resistance (TCR) tells how much its value changes as its\u00a0temperature changes. It is usually expressed in ppm\/\u00b0C (parts per million per degree Centigrade) units.\u00a0What does that really mean? Let’s use an example: Riedon’s 50 ohm 100 Series precision resistor has a (standard) TCR of 20ppm\/\u00b0C. \u00a0That means its resistance will […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[301,3,210],"tags":[395,355,357,358,356,359],"class_list":["post-1018","post","type-post","status-publish","format-standard","hentry","category-digikey-2","category-resistors","category-wirewound-resistors-2","tag-resistors","tag-resistors-and-temperature","tag-tcr-of-1-ppm","tag-tcr-of-10ppm","tag-tcr-of-2-ppm","tag-temperature-coefficient-of-resistance"],"yoast_head":"\nUnderstanding Resistors and Temperature - Riedon Company Blog<\/title>\n<meta name=\"description\" content=\"A resistor's Temperature Coefficient of Resistance (TCR) tells how much its value changes as its temperature changes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/riedon.com\/blog\/understanding-resistors-and-temperature\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Understanding Resistors and Temperature - Riedon Company Blog\" \/>\n<meta property=\"og:description\" content=\"A resistor's Temperature Coefficient of Resistance (TCR) tells how much its value changes as its temperature changes.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/riedon.com\/blog\/understanding-resistors-and-temperature\/\" \/>\n<meta property=\"og:site_name\" content=\"Riedon Company Blog\" \/>\n<meta property=\"article:published_time\" content=\"2016-02-29T22:15:29+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2016-11-08T02:38:51+00:00\" \/>\n<meta name=\"author\" content=\"Riedon\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Riedon\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/riedon.com\/blog\/understanding-resistors-and-temperature\/\",\"url\":\"https:\/\/riedon.com\/blog\/understanding-resistors-and-temperature\/\",\"name\":\"Understanding Resistors and Temperature - 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