{"id":6934,"date":"2026-06-22T02:13:24","date_gmt":"2026-06-22T02:13:24","guid":{"rendered":"https:\/\/materialparts.com\/moc3021s-ta1\/"},"modified":"2026-06-22T02:13:24","modified_gmt":"2026-06-22T02:13:24","slug":"moc3021s-ta1","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/moc3021s-ta1\/","title":{"rendered":"MOC3021S-TA1"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The MOC3021S-TA1 from onsemi is a zero-crossing triac driver optocoupler with 400V blocking voltage, 60mA LED trigger current, and DIP-6 package for AC power control.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u0627\u0644\u0646\u0648\u0639<\/td>\nZero-Crossing Triac Driver Optocoupler<\/td>\n<\/tr>\n
Output Device<\/td>\nPhoto-triac (zero-crossing detector)<\/td>\n<\/tr>\n
Blocking Voltage<\/td>\n400 V (non-repetitive peak off-state)<\/td>\n<\/tr>\n
LED Trigger Current (IFT)<\/td>\n15 mA (maximum)<\/td>\n<\/tr>\n
LED Forward Voltage<\/td>\n1.25 V (typical) @ IF=10mA<\/td>\n<\/tr>\n
On-State Current<\/td>\n100 mA (RMS)<\/td>\n<\/tr>\n
\u062c\u0647\u062f \u0627\u0644\u0639\u0632\u0644<\/td>\n5300 Vrms (1 minute)<\/td>\n<\/tr>\n
Zero-Crossing Voltage<\/td>\n10 V (inhibit voltage)<\/td>\n<\/tr>\n
Zero-Crossing Hysteresis<\/td>\n5 V<\/td>\n<\/tr>\n
dV\/dt<\/td>\n10 V\/us (critical rate of rise)<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nDIP-6 (300 mil)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40C to +85C<\/td>\n<\/tr>\n
\u0645\u0648\u0627\u0641\u0642\u0627\u062a \u0627\u0644\u0633\u0644\u0627\u0645\u0629<\/td>\nUL1577, VDE, CSA<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Zero-crossing detection built-in<\/li>\n
  • 400V blocking voltage<\/li>\n
  • 5300Vrms isolation voltage<\/li>\n
  • Low 15mA trigger current<\/li>\n
  • Zero-crossing reduces EMI in AC switching<\/li>\n
  • DIP-6 through-hole package<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Solid-state relay driver<\/li>\n
    • AC motor speed control<\/li>\n
    • Light dimmer circuits<\/li>\n
    • Heater control<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MOC3021S-TA1 from onsemi is a zero-crossing triac driver optocoupler with 400V blocking voltage, 60mA LED trigger current, and DIP-6 package for AC power control. Key Specifications Type Zero-Crossing Triac Driver Optocoupler Output Device Photo-triac (zero-crossing detector) Blocking Voltage 400 V (non-repetitive peak off-state) LED Trigger Current (IFT) 15 mA (maximum) LED Forward […]<\/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":[19,13],"tags":[],"chip_brand":[144],"class_list":["post-6934","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-on"],"acf":{"brief_explanation":"Zero-Crossing Triac Driver Opto, 400V, 15mA IFT, DIP-6","date_code":"","package_case":"DIP-6 (9.9 x 6.5 x 3.7 mm, 300 mil width)","in_stock":7890,"datasheet":"https:\/\/www.onsemi.com\/download\/data-sheet\/pdf\/moc3021s-d.pdf","price":"$0.45 @ 1ku","product_introduction":"The MOC3021S-TA1 from onsemi is a zero-crossing triac driver optocoupler designed for controlling AC power loads through an external power triac. The integrated zero-crossing detector ensures the external triac is triggered only when the AC line voltage crosses zero, dramatically reducing the inrush current and electromagnetic interference (EMI) compared to random-phase triggering. The 400V blocking voltage supports 240VAC line operation with margin. The 15mA maximum LED trigger current is easily driven from a microcontroller GPIO through a current-limiting resistor. The 5300Vrms isolation voltage provides safe separation between the low-voltage control circuit and the high-voltage AC line. The DIP-6 package is easy to handle and provides adequate creepage for 240VAC applications. The -TA1 suffix indicates onsemi's specific ordering code.","working_principle":"The MOC3021S-TA1 contains an infrared LED optically coupled to a zero-crossing photo-triac detector. When LED current flows (IF > IFT = 15 mA), the LED emits infrared photons that illuminate the photo-triac die. The photo-triac has two anti-parallel thyristor structures that can conduct AC current. The zero-crossing detector circuit inhibits the photo-triac from turning on when the AC line voltage is above the inhibit threshold (10V). The triac can only be triggered when the line voltage is within +\/-10V of zero, which occurs twice per AC cycle (100 or 120 times per second for 50\/60 Hz). This zero-crossing triggering ensures the external power triac turns on at the voltage zero-crossing, producing a gradual current ramp-up rather than a sudden step, which reduces EMI and thermal stress on the load. The external power triac is driven by the photo-triac output current (up to 100mA RMS), which is sufficient to trigger most medium-current power triacs.","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>NC<\/td>-<\/td>No connect<\/td><\/tr>
      4<\/td>Main Terminal 1<\/td>Output<\/td>Photo-triac main terminal 1<\/td><\/tr>
      5<\/td>NC<\/td>-<\/td>No connect<\/td><\/tr>
      6<\/td>Main Terminal 2<\/td>Output<\/td>Photo-triac main terminal 2<\/td><\/tr><\/table>","application_scenarios":"
      • 240VAC heater zero-crossing SSR with MOC3021S driving BTA16 power triac<\/li>
      • AC fan speed control with zero-crossing triggering for reduced EMI<\/li>
      • Incandescent lamp on\/off control with 5300Vrms isolation from MCU<\/li>
      • Industrial solenoid valve AC driver with zero-crossing for contact life extension<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        onsemi<\/td>MOC3041M<\/td>DIP-6<\/td>Non-zero-crossing version, 800V<\/td><\/tr>
        Vishay<\/td>MOC3021-TA1<\/td>DIP-6<\/td>Direct equivalent<\/td><\/tr>
        onsemi<\/td>MOC3023M<\/td>DIP-6<\/td>5mA trigger current version<\/td><\/tr>
        Sharp<\/td>S11MD5V<\/td>DIP-6<\/td>Zero-crossing, 600V, alternative<\/td><\/tr>
        onsemi<\/td>MOC3063S-TA1<\/td>DIP-6<\/td>Zero-crossing, 600V blocking<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6934","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=6934"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6934\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=6934"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=6934"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=6934"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=6934"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}