{"id":3004,"date":"2026-02-12T01:08:54","date_gmt":"2026-02-11T19:38:54","guid":{"rendered":"https:\/\/vihaaniotgateway.in\/?post_type=product&#038;p=3004"},"modified":"2026-03-18T13:12:01","modified_gmt":"2026-03-18T07:42:01","slug":"4-channel-5v-optocoupler-relay-module","status":"publish","type":"product","link":"https:\/\/vihaaniotgateway.in\/index.php\/product\/4-channel-5v-optocoupler-relay-module\/","title":{"rendered":"4-Channel Relay Board with Optocoupler for Arduino, Raspberry Pi, ESP32 (Copy)"},"content":{"rendered":"<p data-start=\"322\" data-end=\"726\">Power your automation projects with this reliable 4<strong data-start=\"372\" data-end=\"414\">-Channel Relay Board with Optocoupler<\/strong>, perfect for controlling high-voltage AC or DC loads using low-voltage microcontrollers such as <strong data-start=\"511\" data-end=\"522\">Arduino<\/strong>, <strong data-start=\"524\" data-end=\"540\">Raspberry Pi<\/strong>, <strong data-start=\"542\" data-end=\"551\">ESP32<\/strong>, and <strong data-start=\"557\" data-end=\"568\">ESP8266<\/strong>. Whether you are building a smart home system, IoT gateway, or industrial automation controller, this module ensures safe, efficient, and flexible switching.<\/p>\n<p data-start=\"728\" data-end=\"1057\">Each relay channel is protected by <strong data-start=\"763\" data-end=\"792\">high-quality optocouplers<\/strong>, providing electrical isolation that prevents voltage surges from damaging your microcontroller or development board. The module is compatible with both <strong data-start=\"946\" data-end=\"990\">high-level and low-level trigger signals<\/strong>, ensuring seamless integration with various development platforms.<\/p>\n<p data-start=\"1059\" data-end=\"1536\">For best performance, pair this relay module with our original <strong data-start=\"1122\" data-end=\"1215\"><a class=\"cursor-pointer\" target=\"_new\" rel=\"noopener\" data-start=\"1124\" data-end=\"1213\">ESP32 Development Board<\/a><\/strong> or <strong data-start=\"1219\" data-end=\"1300\"><a class=\"cursor-pointer\" target=\"_new\" rel=\"noopener\" data-start=\"1221\" data-end=\"1298\">Arduino Uno R3 Board<\/a><\/strong>\u2014both available in our store. You can also explore our <strong data-start=\"1355\" data-end=\"1426\"><a class=\"cursor-pointer\" target=\"_new\" rel=\"noopener\" data-start=\"1357\" data-end=\"1424\">LoRa modules<\/a><\/strong> or <strong data-start=\"1430\" data-end=\"1503\"><a class=\"cursor-pointer\" target=\"_new\" rel=\"noopener\" data-start=\"1432\" data-end=\"1501\">OLED displays<\/a><\/strong> to build complete IoT solutions.<\/p>\n<h4 data-start=\"1538\" data-end=\"1560\"><strong data-start=\"1543\" data-end=\"1560\">Key Features:<\/strong><\/h4>\n<ul data-start=\"1561\" data-end=\"2234\">\n<li data-start=\"1561\" data-end=\"1640\">\n<p data-start=\"1563\" data-end=\"1640\"><strong data-start=\"1563\" data-end=\"1595\">4 Independent Relay Channels<\/strong> \u2013 Switch two separate devices simultaneously<\/p>\n<\/li>\n<li data-start=\"1641\" data-end=\"1720\">\n<p data-start=\"1643\" data-end=\"1720\"><strong data-start=\"1643\" data-end=\"1668\">Optocoupler Isolation<\/strong> \u2013 Complete safety between control and load circuits<\/p>\n<\/li>\n<li data-start=\"1721\" data-end=\"1799\">\n<p data-start=\"1723\" data-end=\"1799\"><strong data-start=\"1723\" data-end=\"1759\">High &amp; Low-Level Trigger Support<\/strong> \u2013 Flexible for various microcontrollers<\/p>\n<\/li>\n<li data-start=\"1800\" data-end=\"1853\">\n<p data-start=\"1802\" data-end=\"1853\"><strong data-start=\"1802\" data-end=\"1828\">Relay Output Capacity:<\/strong> 250V AC 10A \/ 30V DC 10A<\/p>\n<\/li>\n<li data-start=\"1854\" data-end=\"1921\">\n<p data-start=\"1856\" data-end=\"1921\"><strong data-start=\"1856\" data-end=\"1874\">Indicator LEDs<\/strong> \u2013 Visual relay status display for easy testing<\/p>\n<\/li>\n<li data-start=\"1922\" data-end=\"2164\">\n<p data-start=\"1924\" data-end=\"2164\"><strong data-start=\"1924\" data-end=\"1954\">Microcontroller Compatible<\/strong> \u2013 Works perfectly with <strong data-start=\"1978\" data-end=\"2060\"><a class=\"cursor-pointer\" target=\"_new\" rel=\"noopener\" data-start=\"1980\" data-end=\"2058\">ESP32 boards<\/a><\/strong>, <strong data-start=\"2062\" data-end=\"2134\"><a class=\"cursor-pointer\" target=\"_new\" rel=\"noopener\" data-start=\"2064\" data-end=\"2132\">Arduino Uno<\/a><\/strong>, <strong data-start=\"2136\" data-end=\"2152\">Raspberry Pi<\/strong>, and others<\/p>\n<\/li>\n<li data-start=\"2165\" data-end=\"2234\">\n<p data-start=\"2167\" data-end=\"2234\"><strong data-start=\"2167\" data-end=\"2186\">Screw Terminals<\/strong> \u2013 Secure connection for power and load circuits<\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"2236\" data-end=\"2258\"><strong data-start=\"2241\" data-end=\"2258\">Applications:<\/strong><\/h4>\n<ul data-start=\"2259\" data-end=\"2990\">\n<li data-start=\"2259\" data-end=\"2463\">\n<p data-start=\"2261\" data-end=\"2463\"><strong data-start=\"2261\" data-end=\"2286\">Smart Home Automation<\/strong> \u2013 Ideal for controlling lights, fans, pumps, locks\u2014can be integrated with <strong data-start=\"2361\" data-end=\"2453\"><a class=\"cursor-pointer\" target=\"_new\" rel=\"noopener\" data-start=\"2363\" data-end=\"2451\">Vihaan IoT Gateway<\/a><\/strong> solutions<\/p>\n<\/li>\n<li data-start=\"2464\" data-end=\"2549\">\n<p data-start=\"2466\" data-end=\"2549\"><strong data-start=\"2466\" data-end=\"2498\">Industrial Equipment Control<\/strong> \u2013 Reliable for machinery and industrial automation<\/p>\n<\/li>\n<li data-start=\"2550\" data-end=\"2762\">\n<p data-start=\"2552\" data-end=\"2762\"><strong data-start=\"2552\" data-end=\"2568\">IoT Projects<\/strong> \u2013 Combine with <strong data-start=\"2584\" data-end=\"2655\"><a class=\"cursor-pointer\" target=\"_new\" rel=\"noopener\" data-start=\"2586\" data-end=\"2653\">LoRa modules<\/a><\/strong> or <strong data-start=\"2659\" data-end=\"2741\"><a class=\"cursor-pointer\" target=\"_new\" rel=\"noopener\" data-start=\"2661\" data-end=\"2739\">ESP32 boards<\/a><\/strong> for remote switching<\/p>\n<\/li>\n<li data-start=\"2763\" data-end=\"2841\">\n<p data-start=\"2765\" data-end=\"2841\"><strong data-start=\"2765\" data-end=\"2793\">DIY Electronics Projects<\/strong> \u2013 Robotics, sensors, and educational prototypes<\/p>\n<\/li>\n<li data-start=\"2842\" data-end=\"2990\">\n<p data-start=\"2844\" data-end=\"2990\"><strong data-start=\"2844\" data-end=\"2872\">Remote Switching Systems<\/strong> \u2013 Build cloud-connected relays with <strong data-start=\"2909\" data-end=\"2990\"><a class=\"cursor-pointer\" target=\"_new\" rel=\"noopener\" data-start=\"2911\" data-end=\"2988\">ESP8266 NodeMCU boards<\/a><\/strong><\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"2992\" data-end=\"3016\"><strong data-start=\"2997\" data-end=\"3016\">Specifications:<\/strong><\/h4>\n<ul data-start=\"3017\" data-end=\"3329\">\n<li data-start=\"3017\" data-end=\"3076\">\n<p data-start=\"3019\" data-end=\"3076\"><strong data-start=\"3019\" data-end=\"3041\">Operating Voltage:<\/strong> 5V DC (12V variant also available)<\/p>\n<\/li>\n<li data-start=\"3077\" data-end=\"3100\">\n<p data-start=\"3079\" data-end=\"3100\"><strong data-start=\"3079\" data-end=\"3098\">Relay Channels:<\/strong> 4<\/p>\n<\/li>\n<li data-start=\"3101\" data-end=\"3133\">\n<p data-start=\"3103\" data-end=\"3133\"><strong data-start=\"3103\" data-end=\"3129\">Optocoupler Isolation:<\/strong> Yes<\/p>\n<\/li>\n<li data-start=\"3134\" data-end=\"3181\">\n<p data-start=\"3136\" data-end=\"3181\"><strong data-start=\"3136\" data-end=\"3154\">Trigger Level:<\/strong> Configurable (High or Low)<\/p>\n<\/li>\n<li data-start=\"3182\" data-end=\"3226\">\n<p data-start=\"3184\" data-end=\"3226\"><strong data-start=\"3184\" data-end=\"3202\">Load Capacity:<\/strong> AC 250V\/10A, DC 30V\/10A<\/p>\n<\/li>\n<li data-start=\"3227\" data-end=\"3266\">\n<p data-start=\"3229\" data-end=\"3266\"><strong data-start=\"3229\" data-end=\"3248\">Indicator LEDs:<\/strong> Yes (per channel)<\/p>\n<\/li>\n<li data-start=\"3267\" data-end=\"3329\">\n<p data-start=\"3269\" data-end=\"3329\"><strong data-start=\"3269\" data-end=\"3288\">Mounting Holes:<\/strong> Provided for easy panel or case mounting<\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"3331\" data-end=\"3357\"><strong data-start=\"3336\" data-end=\"3357\">Package Includes:<\/strong><\/h4>\n<ul data-start=\"3358\" data-end=\"3403\">\n<li data-start=\"3358\" data-end=\"3403\">\n<p data-start=\"3360\" data-end=\"3403\">1 x 4-Channel Relay Module with Optocoupler<\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"3405\" data-end=\"3446\"><strong data-start=\"3410\" data-end=\"3446\">Why Buy from Vihaan IoT Gateway?<\/strong><\/h4>\n<ul data-start=\"3447\" data-end=\"3849\">\n<li data-start=\"3447\" data-end=\"3483\">\n<p data-start=\"3449\" data-end=\"3483\">100% genuine and tested components<\/p>\n<\/li>\n<li data-start=\"3484\" data-end=\"3523\">\n<p data-start=\"3486\" data-end=\"3523\">Official GST invoice with every order<\/p>\n<\/li>\n<li data-start=\"3524\" data-end=\"3739\">\n<p data-start=\"3526\" data-end=\"3739\">Free shipping on orders above \u20b9999 \u2013 check out other essential <strong data-start=\"3589\" data-end=\"3664\"><a class=\"cursor-pointer\" target=\"_new\" rel=\"noopener\" data-start=\"3591\" data-end=\"3662\">IoT Components<\/a><\/strong> and <strong data-start=\"3669\" data-end=\"3737\"><a class=\"cursor-pointer\" target=\"_new\" rel=\"noopener\" data-start=\"3671\" data-end=\"3735\">Sensor Modules<\/a><\/strong><\/p>\n<\/li>\n<li data-start=\"3740\" data-end=\"3800\">\n<p data-start=\"3742\" data-end=\"3800\">Trusted by makers, developers, and industries across India<\/p>\n<\/li>\n<li data-start=\"3801\" data-end=\"3849\">\n<p data-start=\"3803\" data-end=\"3849\">Excellent pre and post-sales technical support<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>2-Channel Relay Module with optocoupler for safe control of AC\/DC loads. Compatible with Arduino, Raspberry Pi, ESP32, and other microcontrollers.<\/p>\n","protected":false},"featured_media":3015,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"product_brand":[],"product_cat":[85],"product_tag":[],"class_list":["post-3004","product","type-product","status-publish","has-post-thumbnail","product_cat-interface-modules","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 4.9.9 - aioseo.com -->\n\t<meta name=\"description\" content=\"2-Channel Relay Module with optocoupler for safe control of AC\/DC loads. 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