{"id":8529,"date":"2026-06-29T03:05:30","date_gmt":"2026-06-29T03:05:30","guid":{"rendered":"https:\/\/materialparts.com\/moc3023s-ta1\/"},"modified":"2026-06-29T06:28:26","modified_gmt":"2026-06-29T06:28:26","slug":"moc3023s-ta1","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/moc3023s-ta1\/","title":{"rendered":"MOC3023S-TA1"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The MOC3023S-TA1 from Lite-On is a zero-crossing triac driver optocoupler in a 6-pin SMD (\u9e25\u7ffc) package with 5000Vrms isolation. Requiring only 5 mA LED trigger current, it drives high-voltage triacs for AC load control up to 400V, making it ideal for AC motor starters, solid-state relays, lighting dimmers, and solenoid valve control in industrial and consumer applications.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
\u9694\u79bb\u7535\u538b<\/td>\n5000 Vrms (1 minute)<\/td>\n<\/tr>\n
Peak Blocking Voltage<\/td>\n400V (VDRM)<\/td>\n<\/tr>\n
LED Trigger Current (IFT)<\/td>\n5 mA max (MOC3023)<\/td>\n<\/tr>\n
Forward Voltage<\/td>\n1.15V typ @ IF=20mA<\/td>\n<\/tr>\n
On-State Current (Peak)<\/td>\n1A (PW=1ms, 120pps)<\/td>\n<\/tr>\n
dv\/dt (Critical)<\/td>\n1000 V\/\u00b5s min<\/td>\n<\/tr>\n
Holding Current<\/td>\n250 \u00b5A typ<\/td>\n<\/tr>\n
Zero-Crossing<\/td>\nNo (random-fire)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40\u00b0C to +110\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\n6-SMD Gull-Wing (tape and reel)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 5000 Vrms input-output isolation for safety<\/li>\n
  • 5 mA maximum LED trigger current (lowest in MOC302x series)<\/li>\n
  • 400V peak blocking voltage for direct AC line drive<\/li>\n
  • High 1000 V\/\u00b5s dv\/dt immunity for noisy environments<\/li>\n
  • Random-fire (no zero-cross) for phase-angle control<\/li>\n
  • UL 1577, CSA, VDE, and CQC safety certifications<\/li>\n
  • Surface-mount gull-wing package for automated assembly<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • AC motor speed control and soft starters<\/li>\n
    • Solid-state relay (SSR) drive circuits<\/li>\n
    • Lighting dimmer circuits (incandescent and LED)<\/li>\n
    • Solenoid and electromagnetic valve control<\/li>\n
    • Temperature control and heater regulation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MOC3023S-TA1 from Lite-On is a zero-crossing triac driver optocoupler in a 6-pin SMD (\u9e25\u7ffc) package with 5000Vrms isolation. Requiring only 5 mA LED trigger current, it drives high-voltage triacs for AC load control up to 400V, making it ideal for AC motor starters, solid-state relays, lighting dimmers, and solenoid valve control in […]<\/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":[13,20],"tags":[],"chip_brand":[144],"class_list":["post-8529","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-on"],"acf":{"brief_explanation":"Triac driver optocoupler, 5mA IFT, 400V, 5kVrms isolation, random-fire, 6-SMD","date_code":"","package_case":"6-SMD Gull-Wing (4.6 x 3.95 x 2.35 mm)","in_stock":4950,"datasheet":"https:\/\/optoelectronics.liteon.com\/upload\/download\/DS-70-99-0019\/MOC302X%20series%20Mar18.PDF","price":"$0.13 @ 500+","product_introduction":"The Lite-On MOC3023S-TA1 is a random-fire triac driver optocoupler designed for interfacing low-voltage control circuits to high-voltage AC loads through power triacs. The device provides 5000 Vrms galvanic isolation between the LED input and the triac driver output, meeting safety requirements for AC mains-connected equipment. The MOC3023 variant features the lowest trigger current in the MOC302x series at 5 mA maximum, reducing the drive requirements from the microcontroller or logic gate. The 400V peak blocking voltage supports direct operation on 240VAC mains with appropriate safety margin. The random-fire (non-zero-crossing) output enables phase-angle control for dimming and motor speed control applications where precise firing angle control is required. The high 1000 V\/\u00b5s dv\/dt immunity prevents false triggering in electrically noisy industrial environments. The surface-mount gull-wing package (S suffix) with tape-and-reel packaging (TA1 suffix) enables automated SMT assembly.","working_principle":"The MOC3023S-TA1 consists of a gallium arsenide infrared LED optically coupled to a silicon bilateral switch (diac\/triac driver) in a single package. When current flows through the input LED (IF > IFT = 5 mA), the emitted infrared light illuminates the photosensitive bilateral switch, causing it to conduct and trigger the external power triac gate. The bilateral switch conducts in both directions, enabling AC triggering of the external triac regardless of the AC line polarity. The optocoupler structure provides galvanic isolation up to 5000 Vrms between the low-voltage control side (LED) and the high-voltage power side (triac driver output), meeting IEC 60747-5-2 safety requirements. The random-fire (non-zero-crossing) characteristic means the bilateral switch triggers immediately when the LED current exceeds IFT, regardless of the AC line voltage phase. This enables phase-angle control where the triac is triggered at a specific point in each AC half-cycle, varying the power delivered to the load. The high dv\/dt rating (1000 V\/\u00b5s minimum) ensures the bilateral switch does not falsely trigger due to rapid voltage transients on the AC line. A snubber network (R-C across the power triac) may still be required for highly inductive loads to limit dv\/dt below the triac's commutation dv\/dt rating.","pin_description":"
      Pin<\/th>Name<\/th>Description<\/th><\/tr>
      1<\/td>Anode<\/td>LED Anode (connect via resistor to MCU\/logic)<\/td><\/tr>
      2<\/td>Cathode<\/td>LED Cathode (connect to GND)<\/td><\/tr>
      3<\/td>NC<\/td>No Connect<\/td><\/tr>
      4<\/td>Main Terminal 1<\/td>Triac Driver Output (to power triac gate)<\/td><\/tr>
      5<\/td>NC<\/td>No Connect<\/td><\/tr>
      6<\/td>Main Terminal 2<\/td>Triac Driver Output (to AC line via resistor)<\/td><\/tr><\/table>","application_scenarios":"
      • AC Dimmer<\/b>: Random-fire output enabling phase-angle dimming of incandescent and dimmable LED lamps with MCU controlling LED trigger timing relative to AC zero-crossing<\/li>
      • Solid-State Relay<\/b>: Driving a power triac (e.g., BTA16) for on\/off switching of 240VAC loads with 5kV isolation protecting the MCU from mains voltage<\/li>
      • Motor Soft Starter<\/b>: Gradually advancing the triac firing angle over multiple AC cycles to ramp up motor voltage and current, reducing mechanical stress on startup<\/li>
      • Solenoid Valve<\/b>: 5 mA trigger current directly drivable from 3.3V MCU GPIO through a 330-ohm series resistor, controlling water and gas solenoid valves<\/li>
      • Heater Control<\/b>: Phase-angle or time-proportional control of resistive heaters with 400V blocking voltage suitable for 240VAC heater elements<\/li><\/ul>","alternative_models":"
        Model<\/th>Brand<\/th>IFT (mA)<\/th>VDRM (V)<\/th>Zero-Cross<\/th><\/tr>
        MOC3021S-TA1<\/td>Lite-On<\/td>15<\/td>400<\/td>No<\/td><\/tr>
        MOC3022S-TA1<\/td>Lite-On<\/td>10<\/td>400<\/td>No<\/td><\/tr>
        MOC3063S-TA1<\/td>Lite-On<\/td>5<\/td>600<\/td>Yes<\/td><\/tr>
        MOC3043M<\/td>ON Semi<\/td>5<\/td>400<\/td>Yes<\/td><\/tr>
        VOM3023TR<\/td>Vishay<\/td>5<\/td>400<\/td>No<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8529","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=8529"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8529\/revisions"}],"predecessor-version":[{"id":8530,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8529\/revisions\/8530"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=8529"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=8529"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=8529"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=8529"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}