{"id":9543,"date":"2026-07-03T08:47:13","date_gmt":"2026-07-03T08:47:13","guid":{"rendered":"https:\/\/materialparts.com\/ltst-c191krkt\/"},"modified":"2026-07-03T08:47:13","modified_gmt":"2026-07-03T08:47:13","slug":"ltst-c191krkt","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/ltst-c191krkt\/","title":{"rendered":"LTST-C191KRKT"},"content":{"rendered":"

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

The LTST-C191KRKT from Lite-On is a red AlInGaP SMD chip LED with water-clear lens in a 0603 package. With 631 nm dominant wavelength, 54 mcd typical luminous intensity at 20 mA, and 130-degree viewing angle, it provides bright, wide-angle indication for consumer 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\n\n\n
Color<\/td>\nRed (AlInGaP)<\/td>\n<\/tr>\n
\u0627\u0644\u0637\u0648\u0644 \u0627\u0644\u0645\u0648\u062c\u064a \u0627\u0644\u0645\u0647\u064a\u0645\u0646<\/td>\n631 nm<\/td>\n<\/tr>\n
Luminous Intensity<\/td>\n18-180 mcd @ 20mA (binned)<\/td>\n<\/tr>\n
\u0632\u0627\u0648\u064a\u0629 \u0627\u0644\u0645\u0634\u0627\u0647\u062f\u0629<\/td>\n130 deg<\/td>\n<\/tr>\n
Forward Voltage<\/td>\n2.0 V typ \/ 2.4 V max @ 20mA<\/td>\n<\/tr>\n
Forward Current<\/td>\n30 mA (DC)<\/td>\n<\/tr>\n
Reverse Voltage<\/td>\n5 V<\/td>\n<\/tr>\n
\u062a\u0628\u062f\u064a\u062f \u0627\u0644\u0637\u0627\u0642\u0629<\/td>\n75 mW<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\n0603 (1608 Metric)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Red AlInGaP LED with 631 nm dominant wavelength<\/li>\n
  • 54 mcd typical intensity at 20 mA<\/li>\n
  • Ultra-wide 130-degree viewing angle<\/li>\n
  • Water-clear lens for high contrast<\/li>\n
  • 0603 package for automated SMT assembly<\/li>\n
  • Operating temperature -55 to +85 deg C<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Status indicator for consumer electronics<\/li>\n
    • Keyboard and front panel backlight<\/li>\n
    • Industrial equipment signal indicator<\/li>\n
    • Automotive dashboard illumination<\/li>\n
    • Handheld device notification LED<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LTST-C191KRKT from Lite-On is a red AlInGaP SMD chip LED with water-clear lens in a 0603 package. With 631 nm dominant wavelength, 54 mcd typical luminous intensity at 20 mA, and 130-degree viewing angle, it provides bright, wide-angle indication for consumer and industrial applications. Key Specifications Color Red (AlInGaP) Dominant Wavelength 631 […]<\/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":[57,13],"tags":[785],"chip_brand":[179],"class_list":["post-9543","post","type-post","status-publish","format-standard","hentry","category-insulated-gate-bipolar-transistors-igbt","category-integrated-circuits-ics","tag-ltst-c191krkt","chip_brand-gigadevice"],"acf":{"brief_explanation":"Red AlInGaP LED, 631nm, 54mcd, 0603, Lite-On","date_code":"","package_case":"0603 (1608 Metric, 1.6 x 0.8 x 0.55 mm)","in_stock":14046,"datasheet":"https:\/\/optoelectronics.liteon.com\/upload\/download\/DS22-2000-223\/LTST-C191KRKT.pdf","price":"$0.05 @ 1ku","product_introduction":"The LTST-C191KRKT from Lite-On is a red AlInGaP chip LED in a 0603 (1608 metric) surface-mount package. With 631 nm dominant wavelength, 54 mcd typical luminous intensity, and 130-degree wide viewing angle, it provides bright and uniform indication. The 2.0 V typical forward voltage at 20 mA allows direct drive from 3.3 V or 5 V logic with a simple series resistor. The water-clear lens provides high contrast in both lit and unlit states. Operating from -55 to +85 deg C, it suits consumer, industrial, and automotive infotainment applications.","working_principle":"The LTST-C191KRKT uses an AlInGaP (Aluminum Indium Gallium Phosphide) epitaxial structure grown on a GaAs substrate. The double heterojunction design confines carriers within the active region, producing efficient red light emission at 631 nm. The p-n junction is formed by epitaxial growth of p-type and n-type AlGaInP layers. When forward-biased, electrons and holes recombine in the active region, emitting photons via radiative recombination. The water-clear epoxy lens directs light with a 130-degree viewing angle through total internal reflection at the epoxy-air interface. The luminous intensity is binned (grades M through R) for consistent appearance in multi-LED applications.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>Anode (+)<\/td>Input<\/td>Positive terminal, connects through current-limiting resistor<\/td><\/tr>\n
      2<\/td>Cathode (-)<\/td>Ground<\/td>Negative terminal, marked by green tint on package<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • Status indicator for consumer electronics<\/li>\n
      • Keyboard and front panel backlight<\/li>\n
      • Industrial equipment signal indicator<\/li>\n
      • Automotive dashboard illumination<\/li>\n
      • Handheld device notification LED<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        Lite-On<\/td>LTST-C191KSKT<\/td>0603<\/td>Yellow version, same series<\/td><\/tr>\n
        Lite-On<\/td>LTST-C191KGKT<\/td>0603<\/td>Green version, same series<\/td><\/tr>\n
        Kingbright<\/td>APHHS1005ZGCK<\/td>0402<\/td>Red LED in smaller 0402<\/td><\/tr>\n
        Broadcom<\/td>HSMD-C191<\/td>0603<\/td>Red LED alternative<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9543","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=9543"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9543\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=9543"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=9543"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=9543"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=9543"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}