{"id":7255,"date":"2026-06-23T08:02:44","date_gmt":"2026-06-23T08:02:44","guid":{"rendered":"https:\/\/materialparts.com\/moc3043xsm-2\/"},"modified":"2026-06-23T08:02:44","modified_gmt":"2026-06-23T08:02:44","slug":"moc3043xsm-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/moc3043xsm-2\/","title":{"rendered":"MOC3043XSM"},"content":{"rendered":"

Productos<\/h2>\n

The MOC3043XSM from ISOCOM is a 6-pin zero-crossing triac driver optocoupler in a surface-mount DIP package. With 5.3kV isolation voltage and 5mA trigger current, it provides safe AC load control interface for industrial and consumer applications.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n
Output Type<\/td>\nTriac, zero-crossing<\/td>\n<\/tr>\n
Peak Blocking Voltage<\/td>\n400 V<\/td>\n<\/tr>\n
Trigger Current (IFT)<\/td>\n5 mA max<\/td>\n<\/tr>\n
Tensi\u00f3n de aislamiento<\/td>\n5.3 kVrms (7.5 kVpeak)<\/td>\n<\/tr>\n
Forward Voltage<\/td>\n1.25 V typical at 30mA<\/td>\n<\/tr>\n
dv\/dt<\/td>\n1000 V\/us (static)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40C to +100C<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Zero-crossing triac driver output for low EMI AC load switching<\/li>\n
  • 5mA maximum LED trigger current for easy microcontroller interface<\/li>\n
  • 5.3kVrms isolation voltage for safe control-to-load separation<\/li>\n
  • 400V peak blocking voltage for 240VAC mains operation<\/li>\n
  • 1000V\/us static dv\/dt immunity for reliable off-state performance<\/li>\n
  • Surface-mount DIP-6 package for compact PCB layouts<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Solid-state relay driver for AC mains load control<\/li>\n
    • Motor drive and control with zero-crossing switching<\/li>\n
    • Industrial and consumer AC power switching interface<\/li>\n
    • Printer, CRT, and solenoid driver circuits<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MOC3043XSM from ISOCOM is a 6-pin zero-crossing triac driver optocoupler in a surface-mount DIP package. With 5.3kV isolation voltage and 5mA trigger current, it provides safe AC load control interface for industrial and consumer applications. Key Specifications Output Type Triac, zero-crossing Peak Blocking Voltage 400 V Trigger Current (IFT) 5 mA max […]<\/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],"tags":[],"chip_brand":[309],"class_list":["post-7255","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","chip_brand-isocom"],"acf":{"brief_explanation":"Zero-crossing triac optocoupler, 400V, 5mA IFT, 5.3kV iso, SMD DIP-6, ISOCOM","date_code":"","package_case":"SMD DIP-6 (7.62 x 7.00 x 4.00 mm, surface mount)","in_stock":11576,"datasheet":"https:\/\/www.isocom.com\/wp-content\/uploads\/2020\/05\/MOC3041-2-3X.pdf","price":"$0.35 @ 1ku","product_introduction":"The MOC3043XSM from ISOCOM Components is a 6-pin zero-crossing triac driver optocoupler in a surface-mount DIP package. The device consists of a gallium arsenide infrared emitting diode optically coupled to a monolithic silicon detector incorporating a zero-crossing bilateral triac driver. The zero-crossing circuit ensures that the triac output only triggers when the AC mains voltage is near zero, dramatically reducing the inrush current and electromagnetic interference (EMI) generated during switching. The 5mA maximum LED trigger current allows direct drive from most microcontroller GPIO pins with a simple series resistor. The 400V peak blocking voltage supports 240VAC RMS mains operation with adequate margin. The 5.3kVrms isolation voltage provides safe electrical separation between the low-voltage control circuit and the high-voltage AC load. The device is UL and VDE approved for safety-critical applications. The surface-mount DIP-6 package allows compact PCB layouts while maintaining the necessary creepage and clearance distances for high-voltage isolation.","working_principle":"The MOC3043XSM combines an IR LED and a zero-crossing triac driver in an optically coupled package. (1) LED Input: When forward current flows through the infrared LED (pins 1-2), it emits infrared radiation that illuminates the photodetector. (2) Photodetector: The photodetector receives the IR signal and generates base drive current for the zero-crossing detection circuit and the triac driver. (3) Zero-Crossing Circuit: The zero-crossing detector monitors the voltage across the main terminals (pins 4-6). When the LED is on, the triac output can only trigger when the mains voltage crosses zero (below approximately 20V). This prevents switching during high-voltage portions of the AC cycle, reducing inrush current and EMI. (4) Triac Output: The bilateral triac output can conduct current in both directions, making it suitable for AC load control. The output is designed to drive the gate of a larger power triac that switches the actual load current. (5) Isolation: The optical coupling provides 5.3kVrms galvanic isolation between the input LED and the output triac, protecting the low-voltage control circuit from the high-voltage AC mains.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>Anode<\/td>I<\/td>LED anode<\/td><\/tr>
      2<\/td>Cathode<\/td>I<\/td>LED cathode<\/td><\/tr>
      3<\/td>NC<\/td>-<\/td>No connection<\/td><\/tr>
      4<\/td>MT1<\/td>O<\/td>Triac main terminal 1<\/td><\/tr>
      5<\/td>NC<\/td>-<\/td>No connection<\/td><\/tr>
      6<\/td>MT2<\/td>O<\/td>Triac main terminal 2<\/td><\/tr><\/table>","application_scenarios":"
      • Solid-state relay driver for AC mains load control with zero-crossing EMI reduction<\/li>
      • Motor drive and control with zero-crossing switching for long contact life<\/li>
      • Industrial and consumer AC power switching interface at 400V blocking<\/li>
      • Printer, CRT, and solenoid driver circuits with 5.3kV isolation<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        ISOCOM<\/td>MOC3043XSMTR<\/td>SMD DIP-6<\/td>Tape and reel version<\/td><\/tr>
        onsemi<\/td>MOC3043M<\/td>DIP-6<\/td>Through-hole equivalent<\/td><\/tr>
        Vishay<\/td>MOC3043S-TA1<\/td>DIP-6<\/td>Through-hole, Vishay brand<\/td><\/tr>
        ISOCOM<\/td>MOC3033XSM<\/td>SMD DIP-6<\/td>250V blocking version<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/7255","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=7255"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/7255\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=7255"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=7255"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=7255"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=7255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}