{"product_id":"fotek-ssr-40aa-solid-state-relay-40a-ac-control-module","title":"FOTEK SSR-40AA Solid State Relay – 40A AC Control Module","description":"\n\u003ch2\u003eFOTEK SSR-40AA Solid State Relay – Reliable AC Switching Control\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSSR-40AA Solid State Relay\u003c\/strong\u003e is a high-performance AC-to-AC switching component designed for industrial and DIY control applications. With a 40-amp load capacity, this solid state relay delivers smooth, silent switching with no mechanical wear — making it an ideal upgrade or replacement part for temperature controllers, automation systems, and PID controllers.\u003c\/p\u003e\n\n\u003cp\u003eUnlike traditional electromechanical relays, the SSR-40AA uses semiconductor technology to switch AC loads with zero arcing, extended operational life, and faster response times. Its compact, panel-mount form factor makes installation straightforward in control cabinets and enclosures.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e40A Load Capacity:\u003c\/strong\u003e Handles demanding AC loads up to 40 amps\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAC-to-AC Control:\u003c\/strong\u003e SSR-40AA type for AC input and AC output switching\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eZero-Crossing Switching:\u003c\/strong\u003e Reduces electrical noise and extends connected component life\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo Mechanical Parts:\u003c\/strong\u003e Silent operation, no arcing, and longer service life versus electromechanical relays\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Panel-Mount Design:\u003c\/strong\u003e Easy installation in control panels or enclosures\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlastic Housing:\u003c\/strong\u003e Lightweight and durable construction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible:\u003c\/strong\u003e Works with FOTEK and Yangming controller systems and most standard PID temperature controllers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e SSR-40AA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Solid State Relay (AC-AC)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLoad Current:\u003c\/strong\u003e 40A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHousing Material:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003ePID temperature controller systems\u003c\/li\u003e\n  \u003cli\u003eIndustrial automation and process control\u003c\/li\u003e\n  \u003cli\u003eHeating element switching (ovens, kilns, water heaters)\u003c\/li\u003e\n  \u003cli\u003eDIY electronics and maker projects\u003c\/li\u003e\n  \u003cli\u003eReplacement part for existing FOTEK\/Yangming relay installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cp\u003eLooking for more electronics and hobby components? Check out these related items from our store:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-percent-better-every-day-motivational-canvas-wall-poster-inspirational-quote\"\u003e\"1% Better Every Day\" Motivational Canvas Poster | Wall Art\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/everything-is-figureoutable-sage-green-quote-canvas-wall-art\"\u003e\"Everything Is Figureoutable\" Sage Green Quote Canvas Wall Art\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eLearn More\u003c\/h3\u003e\n\u003cp\u003eFor guidance on electrical components and safe installation practices, visit the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"nofollow noopener\"\u003eOSHA Electrical Safety Resource Center\u003c\/a\u003e for best practices when working with AC power switching equipment.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does the SSR-40AA solid state relay do?\u003c\/h4\u003e\n\u003cp\u003eA: The SSR-40AA is an AC-to-AC solid state relay that electronically switches AC loads up to 40 amps. It replaces traditional mechanical relays in control circuits, offering silent operation, faster switching, and a much longer service life thanks to its semiconductor-based design with no moving parts.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the SSR-40AA compatible with FOTEK and Yangming PID temperature controllers?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The SSR-40AA solid state relay is a standard component widely used alongside FOTEK and Yangming PID temperature controllers for applications such as controlling heating elements in ovens, kilns, and industrial equipment.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does a solid state relay require a heat sink?\u003c\/h4\u003e\n\u003cp\u003eA: For higher load currents (generally above 10A), it is recommended to mount the SSR-40AA on an appropriately rated aluminum heat sink to dissipate heat generated during operation. This helps ensure reliable long-term performance and protects the relay from thermal overload.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the difference between SSR-40AA and SSR-40DA?\u003c\/h4\u003e\n\u003cp\u003eA: The SSR-40AA accepts an AC control signal input and switches an AC output load, while the SSR-40DA accepts a DC control signal (such as from a microcontroller or PID output) to switch an AC output load. Make sure to select the correct type based on your controller's output signal type.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does the SSR-40AA solid state relay do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The SSR-40AA is an AC-to-AC solid state relay that electronically switches AC loads up to 40 amps. It replaces traditional mechanical relays in control circuits, offering silent operation, faster switching, and a much longer service life thanks to its semiconductor-based design with no moving parts.\"}}, {\"@type\": \"Question\", \"name\": \"Is the SSR-40AA compatible with FOTEK and Yangming PID temperature controllers?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The SSR-40AA solid state relay is a standard component widely used alongside FOTEK and Yangming PID temperature controllers for applications such as controlling heating elements in ovens, kilns, and industrial equipment.\"}}, {\"@type\": \"Question\", \"name\": \"Does a solid state relay require a heat sink?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"For higher load currents (generally above 10A), it is recommended to mount the SSR-40AA on an appropriately rated aluminum heat sink to dissipate heat generated during operation. This helps ensure reliable long-term performance and protects the relay from thermal overload.\"}}, {\"@type\": \"Question\", \"name\": \"What is the difference between SSR-40AA and SSR-40DA?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The SSR-40AA accepts an AC control signal input and switches an AC output load, while the SSR-40DA accepts a DC control signal (such as from a microcontroller or PID output) to switch an AC output load. Make sure to select the correct type based on your controller's output signal type.\"}}]}\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:\/\/vd0uzy-jp.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Soldering \u0026 Electrical\", \"item\": \"https:\/\/vd0uzy-jp.myshopify.com\/collections\/soldering-electrical\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"FOTEK SSR-40AA Solid State Relay – 40A AC Control Module\", \"item\": \"https:\/\/vd0uzy-jp.myshopify.com\/products\/fotek-ssr-40aa-solid-state-relay-40a-ac-control-module\"}]}\u003c\/script\u003e","brand":"Peaceful Pleasures Health and Wellness","offers":[{"title":"SSR-40AA \/ -40A-220-SSR-40AA","offer_id":53658557350201,"sku":"1005010139689057-SSR-40AA--40A-220-SSR-40AA","price":55.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/3689\/5801\/files\/S76121b0465e841b7a42a451341f642cfU.webp?v=1782831286","url":"https:\/\/peacefulpleasureswellness.com\/products\/fotek-ssr-40aa-solid-state-relay-40a-ac-control-module","provider":"Peaceful Pleasures Health and Wellness","version":"1.0","type":"link"}