{"id":2629,"date":"2026-05-24T01:31:20","date_gmt":"2026-05-24T01:31:20","guid":{"rendered":"https:\/\/materialparts.com\/tlp521-4gb\/"},"modified":"2026-05-24T01:32:18","modified_gmt":"2026-05-24T01:32:18","slug":"tlp521-4gb","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/tlp521-4gb\/","title":{"rendered":"TLP521-4GB"},"content":{"rendered":"

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The TLP521-4GB from Toshiba is a quad-channel phototransistor optocoupler in a 16-pin DIP package. With 55V VCEO, 100% minimum CTR (GB rank), and 2500Vrms isolation voltage, it provides reliable signal isolation for industrial control.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
\u6e20\u9053<\/td>\n4<\/td>\n<\/tr>\n
CTR (GB Rank)<\/td>\n100% min<\/td>\n<\/tr>\n
VCEO<\/td>\n55V<\/td>\n<\/tr>\n
\u9694\u79bb\u7535\u538b<\/td>\n2500Vrms<\/td>\n<\/tr>\n
LED Forward Current<\/td>\n50mA max<\/td>\n<\/tr>\n
Collector Current<\/td>\n50mA max<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n16-DIP<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-55\u00b0C to +100\u00b0C<\/td>\n<\/tr>\n<\/table>\n

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    \n
  • 4 isolated channels in single 16-DIP package<\/li>\n
  • GB rank: 100% minimum CTR<\/li>\n
  • 2500Vrms isolation voltage (UL1577 recognized)<\/li>\n
  • 55V collector-emitter breakdown voltage<\/li>\n
  • Industry-standard DIP-16 pinout<\/li>\n
  • UL and cUL recognized<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Programmable logic controller I\/O isolation<\/li>\n
    • AC\/DC input module signal conditioning<\/li>\n
    • Solid-state relay drive circuits<\/li>\n
    • Power supply feedback loop isolation<\/li>\n
    • Communication interface isolation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TLP521-4GB from Toshiba is a quad-channel phototransistor optocoupler in a 16-pin DIP package. With 55V VCEO, 100% minimum CTR (GB rank), and 2500Vrms isolation voltage, it provides reliable signal isolation for industrial control. Key Specifications Channels 4 CTR (GB Rank) 100% min VCEO 55V Isolation Voltage 2500Vrms LED Forward Current 50mA max […]<\/p>\n","protected":false},"author":2,"featured_media":2696,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[],"chip_brand":[169],"class_list":["post-2629","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-toshiba"],"acf":{"brief_explanation":"Quad phototransistor optocoupler, 55V, CTR 100%, 2500Vrms, 16-DIP","date_code":"","package_case":"16-DIP (9.82 x 7.62 x 4.2 mm)","in_stock":14066,"datasheet":"https:\/\/toshiba.semicon-storage.com\/cn\/semiconductor\/product\/isolators\/detail.TLP521-4.html","price":"$1.20 @ 1ku","product_introduction":"The TLP521-4GB from Toshiba is a quad-channel phototransistor optocoupler combining four gallium arsenide infrared LEDs with silicon phototransistors in a 16-pin DIP package. The GB rank guarantees a minimum CTR of 100%, ensuring reliable signal coupling at low LED drive currents. The 2500Vrms isolation voltage provides robust galvanic isolation meeting UL1577 safety requirements. With 55V VCEO and 50mA collector current per channel, it is suited for industrial control and PLC I\/O isolation where multiple isolated channels are needed.","working_principle":"Each channel consists of a GaAs infrared LED optically coupled to a silicon NPN phototransistor. When current flows through the LED, it emits infrared light detected by the phototransistor base, generating base current amplified by the transistor hFE. The output collector current is proportional to LED input current, with the ratio defined as CTR. The GB rank guarantees CTR >= 100% at IF = 5mA. The optical coupling provides electrical isolation with no direct electrical connection.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>AN1<\/td>Input<\/td>Channel 1 LED anode<\/td><\/tr>
      2<\/td>CA1<\/td>Input<\/td>Channel 1 LED cathode<\/td><\/tr>
      3<\/td>CA2<\/td>Input<\/td>Channel 2 LED cathode<\/td><\/tr>
      4<\/td>AN2<\/td>Input<\/td>Channel 2 LED anode<\/td><\/tr>
      5<\/td>AN3<\/td>Input<\/td>Channel 3 LED anode<\/td><\/tr>
      6<\/td>CA3<\/td>Input<\/td>Channel 3 LED cathode<\/td><\/tr>
      7<\/td>CA4<\/td>Input<\/td>Channel 4 LED cathode<\/td><\/tr>
      8<\/td>AN4<\/td>Input<\/td>Channel 4 LED anode<\/td><\/tr>
      9<\/td>E4<\/td>Output<\/td>Channel 4 emitter<\/td><\/tr>
      10<\/td>C4<\/td>Output<\/td>Channel 4 collector<\/td><\/tr>
      11<\/td>C3<\/td>Output<\/td>Channel 3 collector<\/td><\/tr>
      12<\/td>E3<\/td>Output<\/td>Channel 3 emitter<\/td><\/tr>
      13<\/td>E2<\/td>Output<\/td>Channel 2 emitter<\/td><\/tr>
      14<\/td>C2<\/td>Output<\/td>Channel 2 collector<\/td><\/tr>
      15<\/td>C1<\/td>Output<\/td>Channel 1 collector<\/td><\/tr>
      16<\/td>E1<\/td>Output<\/td>Channel 1 emitter<\/td><\/tr><\/table>","application_scenarios":"
      • PLC digital input\/output channel isolation<\/li>
      • AC\/DC input module signal conditioning<\/li>
      • Solid-state relay gate drive isolation<\/li>
      • Switching power supply feedback loop<\/li>
      • Communication line interface isolation<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Vishay<\/td>SFH6741-4<\/td>16-DIP<\/td>Quad optocoupler, 100% CTR<\/td><\/tr>
        Everlight<\/td>EL817-4GB<\/td>16-DIP<\/td>Quad, 100% CTR, compatible<\/td><\/tr>
        Toshiba<\/td>TLP521-2GB<\/td>8-DIP<\/td>Dual channel version<\/td><\/tr>
        Renesas<\/td>PS2801-4<\/td>16-DIP<\/td>Quad, 80% CTR min<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2629","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=2629"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2629\/revisions"}],"predecessor-version":[{"id":2646,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2629\/revisions\/2646"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media\/2696"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2629"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}