{"product_id":"smd2921-400n-gas-discharge-tubes-smd2921-package-ruilon","title":"SMD2921-400N Gas Discharge Tubes – SMD2921 Package | RUILON","description":"\u003cp data-start=\"65\" data-end=\"519\"\u003eThe SMD2921-400N Gas Discharge Tube (GDT) from RUILON is a high-voltage surge protection device engineered to safeguard sensitive electronic circuits from lightning strikes, transient overvoltage, and high-energy surge events. With a nominal DC spark-over voltage of 400V (tested at 100V\/µs), it ensures fast and precise triggering, efficiently diverting surge energy away from critical components and enhancing system reliability.\u003c\/p\u003e\n\u003cp data-start=\"521\" data-end=\"1020\"\u003eUtilizing advanced ceramic gas discharge technology, the SMD2921-400N delivers stable impulse spark-over performance (1kV\/µs), high insulation resistance, and ultra-low capacitance at 1 MHz, making it highly suitable for high-speed communication lines and signal integrity-sensitive applications. Its strong impulse discharge current capability (8\/20µs waveform) and excellent impulse withstand voltage ensure long service life and consistent protection performance even under repeated surge stress.\u003c\/p\u003e\n\u003cp data-start=\"1022\" data-end=\"1459\"\u003eCompared to lower voltage GDT series, the 400V variant offers significantly higher operating voltage tolerance and improved protection margin, making it ideal for industrial and high-power communication systems. The SMD2921 package provides an optimal balance of compact size, mechanical strength, and thermal performance, while supporting automated surface-mount assembly for efficient PCB manufacturing and flexible design integration.\u003c\/p\u003e\n\u003cp data-start=\"1461\" data-end=\"1480\"\u003e\u003cstrong data-start=\"1461\" data-end=\"1478\"\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1481\" data-end=\"1777\"\u003e\n\u003cli data-section-id=\"l9o22r\" data-start=\"1481\" data-end=\"1522\"\u003eDC Spark-Over Voltage: 400V @ 100V\/µS\u003c\/li\u003e\n\u003cli data-section-id=\"m23dwh\" data-start=\"1523\" data-end=\"1569\"\u003eStable impulse spark-over voltage @ 1kV\/µS\u003c\/li\u003e\n\u003cli data-section-id=\"19kifff\" data-start=\"1570\" data-end=\"1612\"\u003eHigh surge current capability (8\/20µS)\u003c\/li\u003e\n\u003cli data-section-id=\"i71dbo\" data-start=\"1613\" data-end=\"1661\"\u003eLow capacitance @ 1 MHz for signal integrity\u003c\/li\u003e\n\u003cli data-section-id=\"1d9sj2t\" data-start=\"1662\" data-end=\"1692\"\u003eHigh insulation resistance\u003c\/li\u003e\n\u003cli data-section-id=\"10hmw0c\" data-start=\"1693\" data-end=\"1735\"\u003eLong service life and high reliability\u003c\/li\u003e\n\u003cli data-section-id=\"13bxeaa\" data-start=\"1736\" data-end=\"1777\"\u003eCompact SMD2921 surface-mount package\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1779\" data-end=\"1798\"\u003e\u003cstrong data-start=\"1779\" data-end=\"1796\"\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1799\" data-end=\"2015\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"xwcxty\" data-start=\"1799\" data-end=\"1832\"\u003eIndustrial automation systems\u003c\/li\u003e\n\u003cli data-section-id=\"cnyvda\" data-start=\"1833\" data-end=\"1869\"\u003eTelecom and networking equipment\u003c\/li\u003e\n\u003cli data-section-id=\"vupg7q\" data-start=\"1870\" data-end=\"1903\"\u003eSmart grid and energy systems\u003c\/li\u003e\n\u003cli data-section-id=\"1qk23rb\" data-start=\"1904\" data-end=\"1940\"\u003ePower supply protection circuits\u003c\/li\u003e\n\u003cli data-section-id=\"1awjrko\" data-start=\"1941\" data-end=\"1974\"\u003eIoT and communication modules\u003c\/li\u003e\n\u003cli data-section-id=\"7rkiwg\" data-start=\"1975\" data-end=\"2015\" data-is-last-node=\"\"\u003eLightning and surge protection systems\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RUILON","offers":[{"title":"Default Title","offer_id":43759668428865,"sku":null,"price":0.0,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0647\/4468\/5633\/files\/VARISTOR-01.png?v=1756461410","url":"https:\/\/hext.in\/products\/smd2921-400n-gas-discharge-tubes-smd2921-package-ruilon","provider":"Hext by Regent Electronics","version":"1.0","type":"link"}