{"product_id":"solid-state-relay-ssr-dc-ac-10a-25a-40a-white-shell-single-phase","title":"Solid State Relay SSR 10A 25A 40A DC to AC White Shell","description":"\u003ch2\u003eSolid State Relay (SSR) – DC Control AC | 10A, 25A \u0026amp; 40A Options\u003c\/h2\u003e\n\u003cp\u003eUpgrade your electrical control setup with this reliable \u003cstrong\u003eSolid State Relay (SSR)\u003c\/strong\u003e featuring DC input and AC output switching. Available in 10DA, 25DA, and 40DA current ratings, this SSR is engineered for fast, silent, and efficient switching — with no moving parts to wear out over time. The clean white shell design makes installation and identification straightforward in any panel or enclosure.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're automating a heating element, controlling industrial equipment, or building a DIY electronics project, this solid state relay delivers consistent, long-lasting performance across a wide range of applications.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultiple Current Ratings:\u003c\/strong\u003e Choose from 10A, 25A, or 40A to match your load requirements precisely\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDC Control Input:\u003c\/strong\u003e Low-voltage DC signal (3–32V DC) controls high-voltage AC output (24–380V AC)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo Mechanical Contacts:\u003c\/strong\u003e Silent, spark-free switching extends operational life significantly versus traditional electromechanical relays\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhite Plastic Shell:\u003c\/strong\u003e Durable housing protects internal components; easy to label and identify in control panels\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle Phase:\u003c\/strong\u003e Designed for single-phase AC load control\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Input Voltage Range:\u003c\/strong\u003e Compatible with microcontrollers, PLCs, and other low-voltage DC signal sources\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy DIN Rail or Panel Mounting:\u003c\/strong\u003e Compact form factor fits standard electrical enclosures\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Switching Response:\u003c\/strong\u003e Zero-crossing turn-on minimizes electrical noise and interference\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eControl Input:\u003c\/strong\u003e 3–32V DC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e 24–380V AC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCurrent Options:\u003c\/strong\u003e 10A (SSR-10DA), 25A (SSR-25DA), 40A (SSR-40DA)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Single Phase, DC to AC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShell Color:\u003c\/strong\u003e White\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCover:\u003c\/strong\u003e Without plastic cover\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwitching Method:\u003c\/strong\u003e Zero-crossing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eTemperature controllers \u0026amp; PID systems\u003c\/li\u003e\n  \u003cli\u003eHome automation \u0026amp; smart home builds\u003c\/li\u003e\n  \u003cli\u003eIndustrial machinery \u0026amp; motor control\u003c\/li\u003e\n  \u003cli\u003e3D printers \u0026amp; CNC equipment\u003c\/li\u003e\n  \u003cli\u003eLighting control systems\u003c\/li\u003e\n  \u003cli\u003eHeating \u0026amp; cooling equipment switching\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more information on electrical safety and best practices for wiring solid state relays in control systems, visit \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety\u003c\/a\u003e and CPSC Electrical Safety Resources.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is a Solid State Relay (SSR) and how does it differ from a mechanical relay?\u003c\/h4\u003e\n\u003cp\u003eA: A Solid State Relay (SSR) is an electronic switching device that uses semiconductor components instead of mechanical contacts to switch loads on and off. Unlike traditional electromechanical relays, SSRs have no moving parts, which means they operate silently, generate less electrical noise, and typically have a much longer service life. This SSR-10DA\/25DA\/40DA accepts a low-voltage DC control signal (3–32V DC) and switches a high-voltage AC load (24–380V AC).\u003c\/p\u003e\n\u003ch4\u003eQ: Which current rating (10A, 25A, or 40A) should I choose for my application?\u003c\/h4\u003e\n\u003cp\u003eA: Select your SSR rating based on the maximum current your AC load will draw. As a general rule, choose a relay rated at least 1.5–2x the actual load current for thermal headroom and longevity. For example, if your load draws 8A, the SSR-10DA is suitable for lighter use, but the SSR-25DA would provide more overhead. For heavy loads such as large heating elements or motors, the SSR-40DA is recommended.\u003c\/p\u003e\n\u003ch4\u003eQ: Do I need a heatsink with this solid state relay?\u003c\/h4\u003e\n\u003cp\u003eA: For loads above approximately 3–5A, using a heatsink is strongly recommended. SSRs generate heat during operation, and adequate thermal management ensures optimal performance and extends the relay's operational lifespan. The SSR-25DA and SSR-40DA in particular should be mounted on a heatsink or thermally conductive surface for sustained high-current applications.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this SSR compatible with Arduino, Raspberry Pi, or PLC systems?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The 3–32V DC control input range is compatible with most microcontrollers (including Arduino, ESP32, and Raspberry Pi GPIO via a logic-level driver) and PLC output modules. Always verify your control signal voltage and current output meet the SSR's minimum trigger requirements before wiring.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is a Solid State Relay (SSR) and how does it differ from a mechanical relay?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A Solid State Relay (SSR) is an electronic switching device that uses semiconductor components instead of mechanical contacts to switch loads on and off. Unlike traditional electromechanical relays, SSRs have no moving parts, which means they operate silently, generate less electrical noise, and typically have a much longer service life. 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SSRs generate heat during operation, and adequate thermal management ensures optimal performance and extends the relay's operational lifespan. The SSR-25DA and SSR-40DA in particular should be mounted on a heatsink or thermally conductive surface for sustained high-current applications.\"}}, {\"@type\": \"Question\", \"name\": \"Is this SSR compatible with Arduino, Raspberry Pi, or PLC systems?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The 3–32V DC control input range is compatible with most microcontrollers (including Arduino, ESP32, and Raspberry Pi GPIO via a logic-level driver) and PLC output modules. 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