{"product_id":"industrial-solid-state-relay-dc-ac-high-power-ssr-60a-400a","title":"Industrial Solid State Relay DC-AC 60A–400A High Power SSR","description":"\n\u003ch2\u003eIndustrial Solid State Relay — DC Control AC, 60A to 400A\u003c\/h2\u003e\n\u003cp\u003eTake full command of your high-power AC loads with this heavy-duty \u003cstrong\u003eIndustrial Solid State Relay (SSR)\u003c\/strong\u003e. Designed for demanding DC-to-AC switching applications, this relay series covers a wide current range — from \u003cstrong\u003e60A all the way up to 400A\u003c\/strong\u003e — making it an ideal choice for industrial automation, heating systems, motor control panels, packaging machinery, and more. With no moving parts, the SSR delivers silent, spark-free, and long-lasting switching performance far superior to traditional mechanical relays.\u003c\/p\u003e\n\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 Current Range:\u003c\/strong\u003e Available in 60A, 80A, 100A, 120A, 150A, 200A, 250A, 300A, 340A, and 400A ratings to match your exact application needs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDC Input \/ AC Output (DA Type):\u003c\/strong\u003e DC control signal switches high-voltage AC loads — perfect for PLC, microcontroller, and industrial controller integration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Power Capability:\u003c\/strong\u003e Built to handle heavy industrial loads including resistive, capacitive, and inductive equipment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSolid State Technology:\u003c\/strong\u003e No mechanical contacts means zero arcing, zero noise, and dramatically extended service life compared to electromechanical relays.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact, Panel-Mount Design:\u003c\/strong\u003e Easy installation into control enclosures and DIN-rail panels.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Switching Response:\u003c\/strong\u003e Near-instantaneous switching for precise process control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Selection Guidelines\u003c\/h3\u003e\n\u003cp\u003eThe rated current printed on the module reflects the average on-state current, \u003cem\u003enot\u003c\/em\u003e the long-term continuous RMS value. Always select a module with sufficient margin based on your real-world operating conditions:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eResistive Loads:\u003c\/strong\u003e Apply a \u003cstrong\u003e2× to 2.5×\u003c\/strong\u003e safety margin — Actual current (A) × 2–2.5 = Required module rating (A)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInductive Loads (motors, transformers, solenoids):\u003c\/strong\u003e Apply a \u003cstrong\u003e6× to 7×\u003c\/strong\u003e safety margin — Actual current (A) × 6–7 = Required module rating (A)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHeat Sink Requirement\u003c\/h3\u003e\n\u003cp\u003eWhen the actual operating current exceeds \u003cstrong\u003e5A\u003c\/strong\u003e, a compatible heat sink \u003cstrong\u003emust\u003c\/strong\u003e be installed to ensure safe, reliable long-term operation and to prevent thermal damage. Adequate cooling is critical for maintaining rated performance.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications at a Glance\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable Ratings:\u003c\/strong\u003e 60A \/ 80A \/ 100A \/ 120A \/ 150A \/ 200A \/ 250A \/ 300A \/ 340A \/ 400A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eControl Type:\u003c\/strong\u003e DC Input → AC Output (DA)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Industrial automation, heating control, motor switching, process control\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMount Type:\u003c\/strong\u003e Panel \/ Enclosure\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cp\u003eStandard models are kept in stock and available for immediate dispatch. For \u003cstrong\u003ebulk or volume orders\u003c\/strong\u003e, please contact customer service with your required quantity to confirm availability and lead times before placing your order.\u003c\/p\u003e\n\n\u003cp\u003eFor additional guidance on selecting solid state relays for industrial applications, visit the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety Resource\u003c\/a\u003e to ensure your installation meets workplace safety standards.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the difference between a solid state relay and a mechanical relay?\u003c\/h4\u003e\n\u003cp\u003eA: A solid state relay (SSR) uses semiconductor devices (such as thyristors or TRIACs) to switch loads electronically, with no moving parts. This results in silent operation, faster switching speeds, longer service life, no contact arcing, and higher resistance to vibration compared to traditional electromechanical relays.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Do I need a heat sink with this solid state relay?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. For any application where the actual operating current exceeds 5A, a properly sized heat sink is required. SSRs generate heat during operation, and without adequate thermal management the module may overheat and fail prematurely. Always match the heat sink to your operating current and ambient temperature.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I choose the correct current rating for my application?\u003c\/h4\u003e\n\u003cp\u003eA: Always apply a safety margin above your actual load current. For resistive loads, multiply the actual current by 2 to 2.5 to find the minimum module rating. For inductive loads such as motors or transformers, multiply the actual current by 6 to 7. This ensures the relay operates well within its thermal and electrical limits for reliable long-term performance.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What types of loads can this DC-AC solid state relay control?\u003c\/h4\u003e\n\u003cp\u003eA: This SSR is designed to switch AC loads using a DC control signal, making it compatible with PLCs, microcontrollers, and industrial automation systems. Typical applications include electric heaters, lighting systems, pumps, motors, conveyor drives, and other industrial equipment.\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 a solid state relay and a mechanical relay?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A solid state relay (SSR) uses semiconductor devices (such as thyristors or TRIACs) to switch loads electronically, with no moving parts. 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