{"product_id":"scr-08-dc-motor-speed-control-module-ac220v-3-5a-potentiometer","title":"SCR-08 DC Motor Speed Controller AC220V 3.5A with Potentiometer","description":"\n\u003ch2\u003eSCR-08 DC Motor Speed Control Module — AC220V, 3.5A, up to 500W\u003c\/h2\u003e\n\u003cp\u003eThe SCR-08 is a precision-engineered DC motor speed control module designed for industrial and workshop applications. Running on AC220V input, it delivers smooth, stepless speed regulation via thyristor (SCR) triggering and voltage negative feedback — giving you reliable, stable motor performance across a wide range of loads. Whether you're running bag-making machinery, wire drawing equipment, food production lines, or printing and packaging systems, this compact module handles it all.\u003c\/p\u003e\n\n\u003cp\u003eCompatible with permanent magnet, separately excited, and field-excited DC motors, the SCR-08 supplies regulated DC power directly to the motor armature for true constant-torque stepless speed control. A built-in soft-start function eliminates excessive inrush current at startup, protecting both the module and your motor.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStepless Speed Regulation\u003c\/strong\u003e — Thyristor trigger control allows infinitely variable speed adjustment from 0 to full speed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Negative Feedback\u003c\/strong\u003e — Keeps motor speed stable under varying load conditions, with a 5% static accuracy rating.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOvercurrent Cutoff Protection\u003c\/strong\u003e — Built-in current cutoff feedback circuit safeguards the motor and module against overload.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSoft Start\u003c\/strong\u003e — Limits startup inrush current, extending the life of the motor and connected machinery.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDisplacement Controller Compatible\u003c\/strong\u003e — Supports automatic stepless speed regulation via external displacement controller.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRemote Control Ready\u003c\/strong\u003e — Compatible with NPN or PNP photoelectric switches for remote speed control.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSimple Terminal Connection\u003c\/strong\u003e — Screw-terminal wiring makes installation straightforward, even in demanding industrial environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eAC 220V, 50\/60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOutput Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e3.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eSuitable Motor Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e50W – 500W\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eArmature Output Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eDC 0–220V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eExcitation Output Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eDC 200V \/ 1A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eStatic Accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e5%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCircuit Topology\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eSingle-phase bridge half-control with negative voltage feedback\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eTrigger Method\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eSingle-junction transistor (UJT)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eConnection Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eTerminal (screw terminal)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e146 × 100 × 40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eOperating Environment\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAmbient temperature: -10°C to +40°C\u003c\/li\u003e\n  \u003cli\u003eRelative humidity: ≤85% (non-condensing), with good ventilation\u003c\/li\u003e\n  \u003cli\u003eNot suitable for explosive atmospheres or environments with conductive metal dust\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× SCR-08 Motor Speed Control Module\u003c\/li\u003e\n  \u003cli\u003e1× Potentiometer\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety \u0026amp; Electrical Standards\u003c\/h3\u003e\n\u003cp\u003eWhen installing and wiring motor control modules, always follow applicable electrical safety guidelines. For general electrical safety best practices in industrial settings, refer to \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety Standards\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What types of DC motors are compatible with the SCR-08 speed control module?\u003c\/h4\u003e\n\u003cp\u003eA: The SCR-08 is compatible with permanent magnet DC motors, separately excited DC motors, and field-excited (excitation) DC motors rated between 50W and 500W. It regulates speed by controlling the armature voltage from DC 0V to DC 220V, enabling smooth, constant-torque stepless speed control.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can the SCR-08 be used with an external controller or automated system?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The SCR-08 supports external displacement controllers for automatic stepless speed adjustment, and is also compatible with NPN or PNP photoelectric switches for remote speed control integration — making it suitable for automated production lines and machinery.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How does the soft-start feature protect my motor?\u003c\/h4\u003e\n\u003cp\u003eA: The built-in soft-start circuit gradually ramps up the voltage supplied to the motor armature at startup, limiting inrush current that would otherwise stress the motor windings and connected components. This extends equipment service life and reduces wear on downstream machinery.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the input voltage requirement for the SCR-08?\u003c\/h4\u003e\n\u003cp\u003eA: The SCR-08 requires a single-phase AC 220V, 50\/60Hz power supply. It is not designed for 110V systems without an appropriate step-up transformer. Always verify your local mains voltage before installation.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What types of DC motors are compatible with the SCR-08 speed control module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The SCR-08 is compatible with permanent magnet DC motors, separately excited DC motors, and field-excited (excitation) DC motors rated between 50W and 500W. It regulates speed by controlling the armature voltage from DC 0V to DC 220V, enabling smooth, constant-torque stepless speed control.\"}}, {\"@type\": \"Question\", \"name\": \"Can the SCR-08 be used with an external controller or automated system?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The SCR-08 supports external displacement controllers for automatic stepless speed adjustment, and is also compatible with NPN or PNP photoelectric switches for remote speed control integration — making it suitable for automated production lines and machinery.\"}}, {\"@type\": \"Question\", \"name\": \"How does the soft-start feature protect my motor?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The built-in soft-start circuit gradually ramps up the voltage supplied to the motor armature at startup, limiting inrush current that would otherwise stress the motor windings and connected components. This extends equipment service life and reduces wear on downstream machinery.\"}}, {\"@type\": \"Question\", \"name\": \"What is the input voltage requirement for the SCR-08?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The SCR-08 requires a single-phase AC 220V, 50\/60Hz power supply. It is not designed for 110V systems without an appropriate step-up transformer. Always verify your local mains voltage before installation.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Tools \u0026 Hardware\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/collections\/tools-hardware\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"SCR-08 DC Motor Speed Controller AC220V 3.5A with Potentiometer\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/products\/scr-08-dc-motor-speed-control-module-ac220v-3-5a-potentiometer\"}]}\u003c\/script\u003e","brand":"Vue","offers":[{"title":"800W","offer_id":48748376654016,"sku":"35:353308#800W","price":207.99,"currency_code":"USD","in_stock":true},{"title":"600W","offer_id":48748376686784,"sku":"35:100016897#600W","price":207.99,"currency_code":"USD","in_stock":true},{"title":"500W","offer_id":48748376719552,"sku":"35:201283931#500W","price":207.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/9338\/7968\/files\/Sa2750ba5ea474becbfaf43e27260e8b5z.webp?v=1786202893","url":"https:\/\/vueselect.com\/products\/scr-08-dc-motor-speed-control-module-ac220v-3-5a-potentiometer","provider":"Vue","version":"1.0","type":"link"}