{"id":3314,"date":"2026-06-01T01:17:24","date_gmt":"2026-06-01T01:17:24","guid":{"rendered":"https:\/\/materialparts.com\/tlp291bl-tpset\/"},"modified":"2026-06-01T01:17:24","modified_gmt":"2026-06-01T01:17:24","slug":"tlp291bl-tpset","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/tlp291bl-tpset\/","title":{"rendered":"TLP291(BL-TP,SE(T"},"content":{"rendered":"

Productos<\/h2>\n

The TLP291(BL-TP,SE(T from Toshiba is a phototransistor-output optocoupler in a compact SO4 surface-mount package. Featuring a GaAs infrared LED optically coupled to a silicon phototransistor, it provides 3750Vrms isolation voltage with a wide operating temperature range of -55 to 110\u00b0C. The BL-TP suffix denotes tape-and-reel packaging with specific CTR rank selection. It is UL1577, cUL, VDE, and CQC safety certified.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n
Tensi\u00f3n de aislamiento<\/td>\n3750 Vrms min<\/td>\n<\/tr>\n
Tensi\u00f3n colector-emisor (VCEO)<\/td>\n80V<\/td>\n<\/tr>\n
Collector Current<\/td>\n50mA<\/td>\n<\/tr>\n
Forward Current<\/td>\n50mA<\/td>\n<\/tr>\n
CTR Range<\/td>\n200% to 400% (BL rank) @ IF=5mA<\/td>\n<\/tr>\n
Forward Voltage<\/td>\n1.25V typical<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-55 to 110\u00b0C<\/td>\n<\/tr>\n
Paquete<\/td>\nSO4 (2.6 x 7.0 x 2.1mm)<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Ultra-low profile 2.3mm package for high-density mounting<\/li>\n
  • 3750Vrms minimum isolation voltage<\/li>\n
  • Wide operating temperature range: -55 to 110\u00b0C<\/li>\n
  • Safety standard approvals: UL1577, cUL, VDE, CQC<\/li>\n
  • Multiple CTR ranks available<\/li>\n
  • DC input type with phototransistor output<\/li>\n
  • RoHS compliant<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Switching power supply feedback isolation<\/li>\n
    • PLC I\/O interfaces<\/li>\n
    • Communication interface signal isolation<\/li>\n
    • Hybrid IC input-output isolation<\/li>\n
    • General-purpose AC\/DC power supply isolation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TLP291(BL-TP,SE(T from Toshiba is a phototransistor-output optocoupler in a compact SO4 surface-mount package. Featuring a GaAs infrared LED optically coupled to a silicon phototransistor, it provides 3750Vrms isolation voltage with a wide operating temperature range of -55 to 110\u00b0C. The BL-TP suffix denotes tape-and-reel packaging with specific CTR rank selection. It is […]<\/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":[169],"class_list":["post-3314","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-toshiba"],"acf":{"brief_explanation":"Phototransistor optocoupler, 80V, 50mA, 3750Vrms isolation, SO4, BL rank CTR 200-400%","date_code":"","package_case":"SO4 (2.6 x 7.0 x 2.1 mm, 4-pin SMD)","in_stock":8432,"datasheet":"https:\/\/toshiba.semicon-storage.com\/us\/semiconductor\/product\/isolators-solid-state-relays\/detail.TLP291.html","price":"$0.18 @ 1ku","product_introduction":"The TLP291 from Toshiba is a phototransistor-output optocoupler housed in a compact SO4 surface-mount package. It combines a GaAs infrared LED with a silicon phototransistor to provide galvanic isolation up to 3750Vrms. Designed for high-density PCB mounting in switching power supplies, PLCs, and communication interfaces. Wide operating temperature range of -55 to 110\u00b0C and comprehensive safety certifications (UL1577, cUL, VDE, CQC). The BL-TP,SE(T suffix denotes tape-and-reel packaging with the BL CTR rank (200-400% at IF=5mA).","working_principle":"The TLP291 operates by converting an electrical input signal to light using a GaAs infrared LED, then back to an electrical signal via a silicon phototransistor. When forward current flows through the LED (pins 1-2), it emits infrared light detected by the phototransistor (pins 3-4), causing collector current to flow proportional to the LED current. The current transfer ratio (CTR) defines this proportionality, with the BL rank offering 200-400% at IF=5mA. The optocoupler provides galvanic isolation between input and output circuits, with the internal isolation barrier rated at 3750Vrms for one minute.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>Anode<\/td>Input<\/td>LED anode<\/td><\/tr>
      2<\/td>Cathode<\/td>Input<\/td>LED cathode<\/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 feedback loop isolation in AC\/DC and DC\/DC converters<\/li>
      • PLC digital I\/O module signal isolation<\/li>
      • Communication interface galvanic isolation (RS-485, CAN bus)<\/li>
      • Hybrid IC input-output isolation for motor drive circuits<\/li>
      • General-purpose signal isolation in industrial and consumer electronics<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Vishay<\/td>SFH618A-3<\/td>DIP-4<\/td>CTR 100-200%, 5300Vrms<\/td><\/tr>
        Everlight<\/td>EL817C<\/td>DIP-4<\/td>CTR 200-400%<\/td><\/tr>
        Sharp<\/td>PC817C<\/td>DIP-4<\/td>CTR 200-400%<\/td><\/tr>
        Toshiba<\/td>TLP293<\/td>SO4<\/td>Pin compatible, higher CTR<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/3314","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=3314"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/3314\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=3314"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=3314"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=3314"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=3314"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}