{"product_id":"4000w-ac-scr-voltage-regulator-motor-speed-controller","title":"4000W AC SCR Voltage Regulator \u0026 Motor Speed Controller","description":"\u003ch2\u003e4000W AC SCR Electric Voltage Regulator \u0026amp; Motor Speed Controller\u003c\/h2\u003e\n\u003cp\u003eTake precise control of your electrical loads with this powerful \u003cstrong\u003e4000W AC SCR Voltage Regulator and Motor Speed Controller\u003c\/strong\u003e. Designed for versatility and reliability, this compact unit lets you dial in the exact voltage output you need — from 0 to 220V AC — using a smooth, easy-to-operate rotary knob. Whether you're managing resistive heating loads, controlling the speed of a single-phase AC motor, or dimming incandescent lighting, this SCR (Silicon Controlled Rectifier) controller delivers consistent, dependable performance.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Power Capacity:\u003c\/strong\u003e Handles up to 4000W peak load, making it suitable for demanding applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull Voltage Range:\u003c\/strong\u003e Adjustable from 0 to 220V AC for precise, stepless control.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSCR Thyristor Technology:\u003c\/strong\u003e Provides smooth, efficient regulation for resistive loads including heating wire and incandescent lamps, as well as most single-phase AC motors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Sturdy Design:\u003c\/strong\u003e Dimensions of 85mm (L) × 55mm (W) × 38mm (H) make it easy to integrate into panels, enclosures, or workbenches. Knob inner hole diameter: 6mm.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlug-and-Play Ready:\u003c\/strong\u003e Simple to install and operate right out of the box — no complex wiring expertise required.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRecommended Load:\u003c\/strong\u003e Long-term resistive load is recommended to be kept within 2000W for continuous, sustained operation. Peak capacity reaches 4000W.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal Uses\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eHeating element speed\/temperature control (e.g., heating wire, soldering stations)\u003c\/li\u003e\n  \u003cli\u003eDimming incandescent lamps and lighting circuits\u003c\/li\u003e\n  \u003cli\u003eSpeed control for single-phase AC motors (fans, pumps, small power tools)\u003c\/li\u003e\n  \u003cli\u003eDIY electronics, workshop, and laboratory applications\u003c\/li\u003e\n  \u003cli\u003eHome \u0026amp; garden power management tasks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Voltage:\u003c\/strong\u003e AC 220V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Voltage:\u003c\/strong\u003e 0–220V AC (adjustable)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Power:\u003c\/strong\u003e 4000W (peak); 2000W recommended for continuous resistive loads\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eController Type:\u003c\/strong\u003e SCR (Silicon Controlled Rectifier \/ Thyristor)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 85 × 55 × 38 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKnob Inner Hole:\u003c\/strong\u003e 6mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Loads:\u003c\/strong\u003e Resistive loads (heating wire, incandescent lamps); most single-phase AC motors\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e This controller is optimized for resistive loads and most single-phase AC motors. Compatibility with other load types (e.g., inductive or capacitive loads, variable-frequency drives, LED bulbs) is not guaranteed. Always verify your load type before use.\u003c\/p\u003e\n\n\u003cp\u003eFor guidance on electrical safety and best practices when working with voltage control equipment, visit the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety resource\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What types of loads is the 4000W AC SCR Voltage Regulator compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This SCR voltage regulator and motor speed controller is best suited for \u003cstrong\u003eresistive loads\u003c\/strong\u003e such as heating wires and incandescent lamps, as well as \u003cstrong\u003emost single-phase AC motors\u003c\/strong\u003e. It is not guaranteed to work with inductive loads, LED drivers, or other complex load types. Always confirm your application is compatible before connecting.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the difference between the 4000W peak rating and the 2000W recommended load?\u003c\/h4\u003e\n\u003cp\u003eA: The \u003cstrong\u003e4000W rating\u003c\/strong\u003e refers to the controller's maximum peak capacity for short-duration or intermittent loads. For \u003cstrong\u003econtinuous, long-term operation\u003c\/strong\u003e, it is recommended to keep the resistive load at or below 2000W to ensure reliable performance and extend the unit's lifespan.\u003c\/p\u003e\n\u003ch4\u003eQ: How do I adjust the output voltage on this SCR controller?\u003c\/h4\u003e\n\u003cp\u003eA: Simply turn the \u003cstrong\u003erotary knob\u003c\/strong\u003e (6mm inner hole diameter) to smoothly adjust the AC output voltage from 0V up to 220V. The stepless adjustment gives you precise control over motor speed, heating intensity, or lighting dimming levels — no additional tools or complex setup required.\u003c\/p\u003e\n\u003ch4\u003eQ: Can this voltage regulator be used for LED dimming?\u003c\/h4\u003e\n\u003cp\u003eA: This SCR controller is designed for \u003cstrong\u003eresistive and most single-phase AC motor loads\u003c\/strong\u003e. Standard LEDs and LED drivers use a different type of circuitry and are generally \u003cstrong\u003enot compatible\u003c\/strong\u003e with SCR-based dimmers. For LED dimming, a purpose-built LED dimmer is recommended.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What types of loads is the 4000W AC SCR Voltage Regulator compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This SCR voltage regulator and motor speed controller is best suited for resistive loads such as heating wires and incandescent lamps, as well as most single-phase AC motors. It is not guaranteed to work with inductive loads, LED drivers, or other complex load types. Always confirm your application is compatible before connecting.\"}}, {\"@type\": \"Question\", \"name\": \"What is the difference between the 4000W peak rating and the 2000W recommended load?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The 4000W rating refers to the controller's maximum peak capacity for short-duration or intermittent loads. For continuous, long-term operation, it is recommended to keep the resistive load at or below 2000W to ensure reliable performance and extend the unit's lifespan.\"}}, {\"@type\": \"Question\", \"name\": \"How do I adjust the output voltage on this SCR controller?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Simply turn the rotary knob (6mm inner hole diameter) to smoothly adjust the AC output voltage from 0V up to 220V. The stepless adjustment gives you precise control over motor speed, heating intensity, or lighting dimming levels — no additional tools or complex setup required.\"}}, {\"@type\": \"Question\", \"name\": \"Can this voltage regulator be used for LED dimming?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This SCR controller is designed for resistive and most single-phase AC motor loads. Standard LEDs and LED drivers use a different type of circuitry and are generally not compatible with SCR-based dimmers. For LED dimming, a purpose-built LED dimmer is recommended.\"}}]}\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:\/\/vpggdm-rp.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Tech, Tools \u0026 Auto\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/collections\/tech-tools-auto\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"4000W AC SCR Voltage Regulator \u0026 Motor Speed Controller\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/products\/4000w-ac-scr-voltage-regulator-motor-speed-controller\"}]}\u003c\/script\u003e","brand":"Qme","offers":[{"title":"1pc","offer_id":49621684519126,"sku":"14:771#1pc","price":18.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0827\/5243\/8486\/files\/S8767e2f97a564c40b955e2da9c145389w.webp?v=1785072982","url":"https:\/\/qmeboost.com\/products\/4000w-ac-scr-voltage-regulator-motor-speed-controller","provider":"Qme","version":"1.0","type":"link"}