{"id":5435,"date":"2026-06-10T02:07:42","date_gmt":"2026-06-10T02:07:42","guid":{"rendered":"https:\/\/materialparts.com\/ltv-817-a\/"},"modified":"2026-06-10T02:07:42","modified_gmt":"2026-06-10T02:07:42","slug":"ltv-817-a","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/ltv-817-a\/","title":{"rendered":"LTV-817-A"},"content":{"rendered":"

Productos<\/h2>\n

The LTV-817-A from Lite-On is a single-channel transistor output optocoupler in a 4-pin DIP through-hole package. With 5000Vrms isolation voltage, 80-160% current transfer ratio (CTR), and 4us response time, it provides reliable signal isolation for industrial control and power supply feedback applications.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Canales<\/td>\n1<\/td>\n<\/tr>\n
CTR (A Grade)<\/td>\n80% to 160% @ IF=5mA, VCE=5V<\/td>\n<\/tr>\n
Tensi\u00f3n de aislamiento<\/td>\n5000 Vrms<\/td>\n<\/tr>\n
Collector-Emitter Voltage<\/td>\n35 V<\/td>\n<\/tr>\n
Forward Voltage<\/td>\n1.2V typical @ IF=20mA<\/td>\n<\/tr>\n
Collector Current<\/td>\n50 mA max<\/td>\n<\/tr>\n
Forward Current<\/td>\n50 mA max<\/td>\n<\/tr>\n
Response Time (rise)<\/td>\n4 us typical<\/td>\n<\/tr>\n
VCE(sat)<\/td>\n0.1V typical @ IC=1mA, IF=20mA<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-30 to +110 C<\/td>\n<\/tr>\n
Paquete<\/td>\nDIP-4<\/td>\n<\/tr>\n
Certifications<\/td>\nUL, CSA, VDE, FIMKO, NEMKO, DEMKO, SEMKO<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Single-channel transistor output optocoupler<\/li>\n
  • 5000Vrms high isolation voltage<\/li>\n
  • 80-160% CTR (A grade)<\/li>\n
  • 4us fast response time<\/li>\n
  • Low VCE(sat): 0.1V typical<\/li>\n
  • Multiple safety certifications (UL, VDE, etc.)<\/li>\n
  • DIP-4 through-hole package<\/li>\n
  • Pin-compatible with PC817A<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Switching power supply feedback<\/li>\n
    • Industrial control signal isolation<\/li>\n
    • Programmable logic controller I\/O<\/li>\n
    • Appliance control circuits<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LTV-817-A from Lite-On is a single-channel transistor output optocoupler in a 4-pin DIP through-hole package. With 5000Vrms isolation voltage, 80-160% current transfer ratio (CTR), and 4us response time, it provides reliable signal isolation for industrial control and power supply feedback applications. Key Specifications Channels 1 CTR (A Grade) 80% to 160% @ […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[],"chip_brand":[212],"class_list":["post-5435","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-liteon"],"acf":{"brief_explanation":"Transistor optocoupler, 5kV isolation, 80-160% CTR, DIP-4","date_code":"","package_case":"DIP-4 (6.4 x 4.6 x 3.9 mm, through-hole)","in_stock":62324,"datasheet":"https:\/\/optoelectronics.liteon.com\/upload\/download\/DS-70-96-0016\/LTV-8X7%20series%20201610%20.pdf","price":"$0.12 @ 1ku","product_introduction":"The LTV-817-A from Lite-On is a single-channel transistor output optocoupler in a 4-pin DIP through-hole package. The A suffix denotes the A-grade CTR range of 80% to 160% at IF=5mA, VCE=5V. The device couples an infrared LED on the input side to a phototransistor on the output side through an optically transparent isolation barrier rated at 5000Vrms. The 80-160% CTR provides adequate signal transfer for common feedback and isolation applications. The 4us response time and 0.1V low VCE(sat) make it suitable for switching power supply optocoupler feedback loops. The LTV-817-A is pin-compatible with the industry-standard PC817A, offering a second-source alternative with equivalent performance.","working_principle":"The LTV-817-A operates through three subsystems: (1) Input LED: An infrared GaAs LED emits light when forward current (IF) flows through it. The typical forward voltage is 1.2V at IF=20mA. The LED can be driven from DC, AC (with a reverse-parallel diode), or pulsed sources. The maximum continuous forward current is 50mA. (2) Isolation Barrier: A transparent dielectric provides optical coupling between the LED and phototransistor while maintaining 5000Vrms electrical isolation. This galvanic isolation protects the low-voltage side from high-voltage transients and breaks ground loops in mixed-signal systems. (3) Output Phototransistor: A silicon NPN phototransistor detects the LED emission and generates a collector current proportional to the LED current. The ratio of output current to input current is the Current Transfer Ratio (CTR), specified as 80% to 160% for the A-grade. The phototransistor operates with VCE up to 35V and collector current up to 50mA. The VCE(sat) of 0.1V at IC=1mA provides low output voltage in saturation.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1<\/td>Anode<\/td>Input<\/td>LED anode (input side)<\/td><\/tr>
      2<\/td>Cathode<\/td>Input<\/td>LED cathode (input side)<\/td><\/tr>
      3<\/td>Emitter<\/td>Output<\/td>Phototransistor emitter<\/td><\/tr>
      4<\/td>Collector<\/td>Output<\/td>Phototransistor collector<\/td><\/tr><\/table>","application_scenarios":"
      • Switching power supply optocoupler feedback with 5000V isolation and 80-160% CTR<\/li>
      • Industrial PLC digital input isolation with UL\/VDE safety certifications<\/li>
      • Appliance control signal coupling with 4us response time and 50mA output current<\/li>
      • Ground loop elimination in mixed-signal systems with 5kV galvanic isolation<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>CTR<\/th>Isolation<\/th>Notes<\/th><\/tr>
        PC817A<\/td>Sharp<\/td>80-160%<\/td>5000V<\/td>Industry standard equivalent<\/td><\/tr>
        LTV-817-B<\/td>Lite-On<\/td>130-260%<\/td>5000V<\/td>Higher CTR grade<\/td><\/tr>
        LTV-817-C<\/td>Lite-On<\/td>200-400%<\/td>5000V<\/td>Highest CTR grade<\/td><\/tr>
        4N35<\/td>Vishay<\/td>100%<\/td>5300V<\/td>6-pin base access<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/5435","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=5435"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/5435\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=5435"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=5435"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=5435"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=5435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}