{"product_id":"yangming-fotek-single-phase-solid-state-relay-ksr-25da-40da-75da-40daeh","title":"FOTEK Yangming Single Phase Solid State Relay KSR 25DA 40DA 75DA","description":"\n\u003ch2\u003eYangming FOTEK Single Phase Solid State Relay – KSR Series\u003c\/h2\u003e\n\u003cp\u003eUpgrade your electrical control systems with the \u003cstrong\u003eYangming FOTEK Single Phase Solid State Relay (KSR Series)\u003c\/strong\u003e. Available in multiple current ratings — 25DA, 40DA, 75DA, and 40DAE-H — these solid state relays deliver fast, silent switching with no moving parts, making them ideal for industrial automation, temperature control panels, machinery, and DIY electronics projects.\u003c\/p\u003e\n\n\u003cp\u003eUnlike mechanical relays, solid state relays (SSRs) offer zero contact bounce, longer operational life, and near-instantaneous switching response. The KSR series is a trusted choice among engineers and hobbyists seeking reliable single-phase AC load control from a low-voltage DC input signal.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultiple Variants:\u003c\/strong\u003e Choose from 25DA, 40DA, 75DA, or 40DAE-H to match your current load requirements\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle Phase Design:\u003c\/strong\u003e Controls single-phase AC loads with precision and consistency\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo Moving Parts:\u003c\/strong\u003e Fully solid state construction for silent operation and extended service life\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlastic Housing:\u003c\/strong\u003e Durable, lightweight enclosure for easy panel mounting\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Switching Response:\u003c\/strong\u003e Near-zero switching delay for time-critical applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Compatible with standard industrial control signals (DC input)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrop-in Replacement:\u003c\/strong\u003e Suitable as a replacement part for existing FOTEK\/Yangming SSR installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Yangming \/ FOTEK\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e KSR (25DA, 40DA, 75DA, 40DAE-H)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Single Phase Solid State Relay\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\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eIndustrial automation and PLC control panels\u003c\/li\u003e\n  \u003cli\u003eTemperature controllers and ovens\u003c\/li\u003e\n  \u003cli\u003eMotor and heater control circuits\u003c\/li\u003e\n  \u003cli\u003eDIY electronics and maker projects\u003c\/li\u003e\n  \u003cli\u003eReplacement parts for existing SSR installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eLearn More About Solid State Relays \u0026amp; Electrical Safety\u003c\/h3\u003e\n\u003cp\u003eFor safety guidelines when working with electrical control components, refer to \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA's Electrical Safety Standards\u003c\/a\u003e. For technical standards on electronic components, visit \u003ca href=\"https:\/\/www.nist.gov\/topics\/electronics\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNIST Electronics Research\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\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-fine-trust-government-mens-graphic-t-shirt-cotton\"\u003e\"Everything Is Fine\" Funny Men's Graphic T-Shirt | Cotton Tee\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the difference between the KSR 25DA, 40DA, 75DA, and 40DAE-H variants?\u003c\/h4\u003e\n\u003cp\u003eA: The number refers to the maximum load current rating in amperes (e.g., 25DA = 25A, 40DA = 40A, 75DA = 75A). The \"40DAE-H\" is an enhanced variant of the 40A model with additional features or thermal characteristics. Choose the rating that matches or exceeds your circuit's load current requirements for safe and reliable operation.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this solid state relay compatible with standard PLC or temperature controller outputs?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The Yangming FOTEK KSR series is designed to be triggered by standard low-voltage DC control signals (typically 3–32V DC), making it directly compatible with most PLCs, temperature controllers, and microcontroller outputs without additional interface circuitry.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Do I need a heat sink with this solid state relay?\u003c\/h4\u003e\n\u003cp\u003eA: For applications running at or near the relay's rated current, mounting to an appropriately sized heat sink is strongly recommended to maintain safe operating temperatures and maximize the lifespan of the component. At lower loads, natural convection may be sufficient.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this a genuine FOTEK \/ Yangming relay?\u003c\/h4\u003e\n\u003cp\u003eA: This product is listed as an original Yangming FOTEK KSR series single phase solid state relay, suitable for use as a new or replacement part in compatible installations.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the difference between the KSR 25DA, 40DA, 75DA, and 40DAE-H variants?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The number refers to the maximum load current rating in amperes (e.g., 25DA = 25A, 40DA = 40A, 75DA = 75A). The \\\"40DAE-H\\\" is an enhanced variant of the 40A model with additional features or thermal characteristics. Choose the rating that matches or exceeds your circuit's load current requirements for safe and reliable operation.\"}}, {\"@type\": \"Question\", \"name\": \"Is this solid state relay compatible with standard PLC or temperature controller outputs?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The Yangming FOTEK KSR series is designed to be triggered by standard low-voltage DC control signals (typically 3–32V DC), making it directly compatible with most PLCs, temperature controllers, and microcontroller outputs without additional interface circuitry.\"}}, {\"@type\": \"Question\", \"name\": \"Do I need a heat sink with this solid state relay?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"For applications running at or near the relay's rated current, mounting to an appropriately sized heat sink is strongly recommended to maintain safe operating temperatures and maximize the lifespan of the component. At lower loads, natural convection may be sufficient.\"}}, {\"@type\": \"Question\", \"name\": \"Is this a genuine FOTEK \/ Yangming relay?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This product is listed as an original Yangming FOTEK KSR series single phase solid state relay, suitable for use as a new or replacement part in compatible installations.\"}}]}\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 Yangming Single Phase Solid State Relay KSR 25DA 40DA 75DA\", \"item\": \"https:\/\/vd0uzy-jp.myshopify.com\/products\/yangming-fotek-single-phase-solid-state-relay-ksr-25da-40da-75da-40daeh\"}]}\u003c\/script\u003e","brand":"Peaceful Pleasures Health and Wellness","offers":[{"title":"other \/ KSR-50DA-H","offer_id":53658535559481,"sku":"1005010490641210-other-KSR-50DA-H","price":51.98,"currency_code":"USD","in_stock":true},{"title":"other \/ KSR-40AA","offer_id":53658535592249,"sku":"1005010490641210-other-KSR-40AA","price":51.98,"currency_code":"USD","in_stock":true},{"title":"other \/ KSR-40DA-H","offer_id":53658535625017,"sku":"1005010490641210-other-KSR-40DA-H","price":38.08,"currency_code":"USD","in_stock":true},{"title":"other \/ KSR-75DA-H","offer_id":53658535657785,"sku":"1005010490641210-other-KSR-75DA-H","price":56.78,"currency_code":"USD","in_stock":true},{"title":"other \/ KSR-50DA","offer_id":53658535690553,"sku":"1005010490641210-other-KSR-50DA","price":47.3,"currency_code":"USD","in_stock":true},{"title":"other \/ KSR-75DA","offer_id":53658535723321,"sku":"1005010490641210-other-KSR-75DA","price":51.08,"currency_code":"USD","in_stock":true},{"title":"other \/ KSR-40DA","offer_id":53658535756089,"sku":"1005010490641210-other-KSR-40DA","price":38.08,"currency_code":"USD","in_stock":true},{"title":"other \/ KSR-75DAE","offer_id":53658535788857,"sku":"1005010490641210-other-KSR-75DAE","price":52.0,"currency_code":"USD","in_stock":true},{"title":"other \/ KSR-50AA","offer_id":53658535821625,"sku":"1005010490641210-other-KSR-50AA","price":52.95,"currency_code":"USD","in_stock":true},{"title":"other \/ KSR-75AA","offer_id":53658535854393,"sku":"1005010490641210-other-KSR-75AA","price":56.78,"currency_code":"USD","in_stock":true},{"title":"other \/ KSR-10AA","offer_id":53658535887161,"sku":"1005010490641210-other-KSR-10AA","price":51.98,"currency_code":"USD","in_stock":true},{"title":"other \/ KSR-25VA","offer_id":53658535919929,"sku":"1005010490641210-other-KSR-25VA","price":51.98,"currency_code":"USD","in_stock":true},{"title":"other \/ KSR-40AA-H","offer_id":53658535952697,"sku":"1005010490641210-other-KSR-40AA-H","price":39.7,"currency_code":"USD","in_stock":true},{"title":"other \/ KSR-25AA","offer_id":53658535985465,"sku":"1005010490641210-other-KSR-25AA","price":51.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/3689\/5801\/files\/Sd03a94afa87d4ca0a515de8a2e2518c6t.webp?v=1782831185","url":"https:\/\/peacefulpleasureswellness.com\/products\/yangming-fotek-single-phase-solid-state-relay-ksr-25da-40da-75da-40daeh","provider":"Peaceful Pleasures Health and Wellness","version":"1.0","type":"link"}