{"id":9290,"date":"2026-07-03T04:45:23","date_gmt":"2026-07-03T04:45:23","guid":{"rendered":"https:\/\/materialparts.com\/ptctz3nr949ett\/"},"modified":"2026-07-03T04:45:47","modified_gmt":"2026-07-03T04:45:47","slug":"ptctz3nr949ett","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/ptctz3nr949ett\/","title":{"rendered":"PTCTZ3NR949ETT"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The PTCTZ3NR949ETT is a PTC (Positive Temperature Coefficient) thermistor from Murata, featuring 9.49 kOhm resistance at 25\u00b0C with \u00b125% tolerance in a 0603 (1608 Metric) surface-mount package. As a PTC thermistor, its resistance increases with temperature, making it suitable for temperature sensing, compensation, and overcurrent protection in automotive and industrial applications.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n
\u0627\u0644\u0646\u0648\u0639<\/td>\nPTC Thermistor<\/td>\n<\/tr>\n
Resistance @ 25\u00b0C<\/td>\n9.49 kOhm<\/td>\n<\/tr>\n
Tolerance<\/td>\n\u00b125%<\/td>\n<\/tr>\n
Package \/ Case<\/td>\n0603 (1608 Metric)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629 \u0625\u0644\u0649 +125 \u062f\u0631\u062c\u0629 \u0645\u0626\u0648\u064a\u0629<\/td>\n<\/tr>\n
EU RoHS<\/td>\n\u0645\u062a\u0648\u0627\u0641\u0642<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • PTC characteristic: resistance increases with temperature<\/li>\n
  • Compact 0603 surface-mount package<\/li>\n
  • 9.49 kOhm nominal resistance at 25\u00b0C<\/li>\n
  • Wide operating temperature range<\/li>\n
  • Murata high-reliability ceramic technology<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Temperature sensing and monitoring<\/li>\n
    • Temperature compensation circuits<\/li>\n
    • Overcurrent protection<\/li>\n
    • Heater control in automotive systems<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The PTCTZ3NR949ETT is a PTC (Positive Temperature Coefficient) thermistor from Murata, featuring 9.49 kOhm resistance at 25\u00b0C with \u00b125% tolerance in a 0603 (1608 Metric) surface-mount package. As a PTC thermistor, its resistance increases with temperature, making it suitable for temperature sensing, compensation, and overcurrent protection in automotive and industrial applications. Key Specifications […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,42],"tags":[446],"chip_brand":[202],"class_list":["post-9290","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-sensors","tag-ptctz3nr949ett","chip_brand-murata"],"acf":{"brief_explanation":"PTC thermistor, 9.49kOhm @ 25\u00b0C, \u00b125%, 0603, -40\u00b0C to +125\u00b0C","date_code":"","package_case":"0603 (1608 Metric) 1.6 x 0.8 x 0.8 mm","in_stock":25000,"datasheet":"https:\/\/www.murata.com\/en-global\/products\/productdetail?partno=PTCTZ3NR949ETT","price":"$0.05 @ 10ku","product_introduction":"The PTCTZ3NR949ETT is a PTC (Positive Temperature Coefficient) thermistor from Murata, featuring 9.49 kOhm resistance at 25\u00b0C with \u00b125% tolerance in a 0603 (1608 Metric) surface-mount package. As a PTC thermistor, its resistance increases significantly with temperature above a reference point, making it suitable for temperature sensing, compensation, and overcurrent protection in automotive and industrial applications.","working_principle":"The PTCTZ3NR949ETT operates as a PTC thermistor:\n\n1. PTC Mechanism: The device is made from doped barium titanate (BaTiO3) polycrystalline ceramic. Below the Curie temperature, the material exhibits relatively low resistance. Above the Curie point, the crystal structure change causes a sharp increase in resistance (several orders of magnitude over a narrow temperature range).\n\n2. Temperature Sensing: By measuring the resistance change, the thermistor can be used as a temperature sensor. The known R-T (resistance-temperature) characteristic allows conversion of measured resistance to temperature.\n\n3. Self-Regulating: When used as a heater or overcurrent protector, the PTC characteristic provides inherent self-regulation: increased current causes heating, which raises resistance, which limits current, creating a stable equilibrium.\n\n4. Circuit Integration: Typically used in a voltage divider with a fixed resistor, the output voltage varies with temperature, providing an analog temperature signal to an ADC or comparator.","pin_description":"\n
      Terminal<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>Terminal A<\/td>Passive<\/td>One end of the PTC thermistor element<\/td><\/tr>\n
      2<\/td>Terminal B<\/td>Passive<\/td>Other end of the PTC thermistor element<\/td><\/tr>\n<\/table>\n

      Note: 2-terminal passive thermistor, no polarity. The 0603 package is compatible with standard chip component placement and reflow soldering.<\/p>","application_scenarios":"\n
      Application<\/th>Circuit Role<\/th>Key Requirement<\/th><\/tr>\n
      Temperature Sensing<\/td>Resistance-based temperature measurement<\/td>9.49kOhm, PTC characteristic<\/td><\/tr>\n
      Overcurrent Protection<\/td>Self-resetting fuse function<\/td>PTC sharp resistance rise<\/td><\/tr>\n
      Motor Protection<\/td>Winding temperature monitoring<\/td>0603 compact, -40\u00b0C to +125\u00b0C<\/td><\/tr>\n
      Heater Control<\/td>Self-regulating heating element<\/td>PTC self-regulation<\/td><\/tr>\n
      Industrial Process<\/td>Temperature compensation<\/td>Murata reliability, ceramic PTC<\/td><\/tr>\n<\/table>","alternative_models":"\n
      Manufacturer<\/th>Part Number<\/th>Package<\/th>Key Specs<\/th>Notes<\/th><\/tr>\n
      TDK\/EPCOS<\/td>B59840C0160A070<\/td>SMD<\/td>PTC, 16 Ohm<\/td>Lower resistance PTC<\/td><\/tr>\n
      Amphenol<\/td>PTC5A16L4R7<\/td>SMD<\/td>PTC, 4.7 Ohm<\/td>Lower resistance option<\/td><\/tr>\n
      Bourns<\/td>MF-MSMF050-2<\/td>1812<\/td>PTC, 500mA hold<\/td>Overcurrent protection type<\/td><\/tr>\n
      Littelfuse<\/td>nanoSMDC050F<\/td>0603<\/td>PTC, 500mA hold<\/td>0603 overcurrent PTC<\/td><\/tr>\n
      Murata<\/td>PTCTZ3NR681ETT<\/td>0603<\/td>PTC, 680 Ohm<\/td>Lower resistance PTC from same series<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9290","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=9290"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9290\/revisions"}],"predecessor-version":[{"id":9300,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9290\/revisions\/9300"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=9290"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=9290"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=9290"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=9290"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}