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This replacement CPU cooling fan is professionally designed for Dell Latitude 14 5420 E5420 series. Built with 5V 4PIN connector, it is an exact substitute for original fan 0HX40M, DFS5K12304363T and FN71. It provides steady strong airflow to exhaust internal heat rapidly, solving abnormal fan noise, high temperature lag and automatic shutdown problems. Precise mounting position allows plug and play without modification, ideal for daily laptop maintenance and faulty fan replacement.