{"product_id":"1-channel-scr-solid-state-relay-switch-module-dc3-24v-40a-optocoupler","title":"1-Channel SCR Solid State Relay Module DC3-24V 40A Optocoupler","description":"\n\u003ch2\u003e1-Channel SCR Solid State Relay Switch Module – DC3-24V, 40A, Optocoupler Isolation\u003c\/h2\u003e\n\u003cp\u003eTake control of high-power circuits with precision using the \u003cstrong\u003eALLOYSEED 1-Channel SCR Solid State Relay (SSR) Switch Module\u003c\/strong\u003e. Designed for makers, engineers, and electronics enthusiasts, this compact thyristor-based relay module offers contactless, silent switching with robust optocoupler isolation — perfect for automation projects, industrial controls, and DIY electronics builds.\u003c\/p\u003e\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\u003eWide Input Voltage Range (DC 3–24V):\u003c\/strong\u003e Compatible with Arduino, Raspberry Pi, microcontrollers, and virtually any low-voltage control signal — no need for a dedicated driver circuit.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Power Output – 40A \/ 600V:\u003c\/strong\u003e Handles demanding loads with a maximum output current of 40A and a maximum withstand voltage of 600V, making it suitable for motors, heaters, lighting, and more.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptocoupler Isolation:\u003c\/strong\u003e Complete electrical isolation between the input control side and the output load side ensures strong resistance to EMI noise and interference, protecting your microcontroller and sensitive components.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContactless Switching Technology:\u003c\/strong\u003e No mechanical contacts means near-silent operation, zero arcing, virtually unlimited switching cycles, and high-frequency switching capability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Easy to Install:\u003c\/strong\u003e At just 62 × 33 mm (2.44 × 1.29 in) and weighing only 5g, this module fits neatly into tight enclosures and on breadboards or PCBs.\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\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eALLOYSEED\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eInput Control Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eDC 3–24V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eMaximum Output Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e40A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eMaximum Withstand Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e600V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eIsolation Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eOptocoupler (MOS Transistor Output)\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;\"\u003e62 × 33 mm \/ 2.44 × 1.29 in\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e5g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Solid State Relay Switch Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino \u0026amp; Raspberry Pi automation projects\u003c\/li\u003e\n  \u003cli\u003eIndustrial machine control systems\u003c\/li\u003e\n  \u003cli\u003eHome automation (lights, fans, heaters)\u003c\/li\u003e\n  \u003cli\u003eMotor speed control and soft-start systems\u003c\/li\u003e\n  \u003cli\u003eHigh-frequency switching circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/22awg-glass-tube-fuse-holder-5x20mm-6x30mm-screw-type-10-pack\"\u003e10-Pack 22AWG Glass Tube Fuse Holder 5x20mm \u0026amp; 6x30mm Screw\u003c\/a\u003e — protect your circuits with quality fuse holders.\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/100w-dual-port-car-charger-starlink-mini-fast-charging\"\u003e100W Dual-Port Car Charger – Fast Charging\u003c\/a\u003e — reliable power delivery for your electronic projects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/140w-usb-c-fast-charging-adapter-auto-power-off-overcharge-protection\"\u003e140W USB-C Fast Charger with Auto Power-Off Overcharge Protection\u003c\/a\u003e — advanced power management for your builds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety \u0026amp; Standards Reference\u003c\/h3\u003e\n\u003cp\u003eFor best practices in electrical component safety and installation guidelines, refer to the U.S. Consumer Product Safety Commission (CPSC) Electrical Safety resources.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Due to differences in monitor settings and lighting, the actual product color may vary slightly from images. Please allow ±1–2 cm measuring deviation due to manual measurement.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What input voltage does the SCR Solid State Relay Switch Module support?\u003c\/h4\u003e\n\u003cp\u003eA: The module supports a wide DC input control voltage range of \u003cstrong\u003e3V to 24V\u003c\/strong\u003e, making it directly compatible with Arduino (5V), Raspberry Pi (3.3V), and most other microcontroller platforms without the need for additional voltage conversion.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the maximum load this solid state relay can handle?\u003c\/h4\u003e\n\u003cp\u003eA: This SSR module supports a maximum output current of \u003cstrong\u003e40A\u003c\/strong\u003e and a maximum withstand voltage of \u003cstrong\u003e600V\u003c\/strong\u003e. It is well-suited for controlling high-power resistive loads such as heaters, lighting rigs, and motors within these rated limits.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Why use optocoupler isolation in a solid state relay module?\u003c\/h4\u003e\n\u003cp\u003eA: Optocoupler isolation provides complete electrical separation between the low-voltage control circuit (e.g., your microcontroller) and the high-voltage\/high-current load circuit. This protects sensitive components from voltage spikes, EMI interference, and ground loops — significantly improving system reliability and safety.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this module suitable for AC or DC load switching?\u003c\/h4\u003e\n\u003cp\u003eA: This module uses a \u003cstrong\u003eSCR (thyristor) \/ MOS transistor output\u003c\/strong\u003e stage. Please verify your specific load type (AC or DC) against the module's output specifications before use. It is primarily designed for DC load applications. Always consult the datasheet and ensure your load does not exceed rated current and voltage limits.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What input voltage does the SCR Solid State Relay Switch Module support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The module supports a wide DC input control voltage range of 3V to 24V, making it directly compatible with Arduino (5V), Raspberry Pi (3.3V), and most other microcontroller platforms without the need for additional voltage conversion.\"}}, {\"@type\": \"Question\", \"name\": \"What is the maximum load this solid state relay can handle?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This SSR module supports a maximum output current of 40A and a maximum withstand voltage of 600V. It is well-suited for controlling high-power resistive loads such as heaters, lighting rigs, and motors within these rated limits.\"}}, {\"@type\": \"Question\", \"name\": \"Why use optocoupler isolation in a solid state relay module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Optocoupler isolation provides complete electrical separation between the low-voltage control circuit (e.g., your microcontroller) and the high-voltage\/high-current load circuit. This protects sensitive components from voltage spikes, EMI interference, and ground loops — significantly improving system reliability and safety.\"}}, {\"@type\": \"Question\", \"name\": \"Is this module suitable for AC or DC load switching?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This module uses a SCR (thyristor) \/ MOS transistor output stage. Please verify your specific load type (AC or DC) against the module's output specifications before use. It is primarily designed for DC load applications. Always consult the datasheet and ensure your load does not exceed rated current and voltage limits.\"}}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"United States","offer_id":47710867095657,"sku":"200007763:201336106","price":26.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S9db1362b2cdf4fb9be439912cd1afe6dx.webp?v=1782061217","url":"https:\/\/oasis-select.com\/products\/1-channel-scr-solid-state-relay-switch-module-dc3-24v-40a-optocoupler","provider":"Oasis Select","version":"1.0","type":"link"}