{"product_id":"mkp62-305v-x2-225k-film-capacitor","title":"MKP62 305V X2 225k Film Capacitor for Interference Suppression","description":"\u003ch2\u003eMKP62 305V X2 2.2µF (225K) Film Capacitor – ASIC PSU EMI Filter \/ Interference Suppression\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eMKP62 305V X2 2.2µF (225K) film capacitor\u003c\/strong\u003e is the \u003cstrong\u003eacross-the-line (X2-class) safety capacitor\u003c\/strong\u003e sitting in the AC input EMI filter of mining PSUs. Rated for direct connection between the live and neutral conductors at \u003cstrong\u003e305VAC\u003c\/strong\u003e, it suppresses high-frequency switching noise generated by the PSU's primary stage from re-entering the mains, and rejects mains-borne transients from coupling into the PSU. X2-class construction is mandatory by safety standard for this position — a regular ceramic or electrolytic cannot legally substitute. A failed X2 capacitor causes EMI compliance failure, mains buzzing, and in extreme cases a controlled fail-safe open that takes the input filter offline.\u003c\/p\u003e\n\u003ch3\u003eHow the X2 Capacitor Fails\u003c\/h3\u003e\n\u003cp\u003eX2 film capacitors are designed to fail safe — they degrade open rather than short, which is why they're allowed across the AC line. After years of mains-transient stress, surges, and humidity exposure, the metallised film inside slowly self-heals away from defects, gradually losing capacitance. Symptoms: increased EMI on conducted-emissions tests, audible buzz at mains frequency in the PSU, and on the bench a measured capacitance well below the 2.2µF rating. Mining PSUs run hot inside crowded enclosures, so this drift happens faster than in consumer gear.\u003c\/p\u003e\n\u003ch3\u003eReplacement Procedure\u003c\/h3\u003e\n\u003cp\u003eDisconnect the PSU from mains and bleed the bulk capacitors (5 minutes minimum, or use a bleed resistor). Identify the failed MKP62 — usually a yellow or red rectangular box mounted directly across the AC input traces, near the input fuse and the common-mode choke. Desolder the old part, clean the through-hole pads, and fit the new MKP62 305V X2 2.2µF in the same orientation. Critical: only fit a part with X2 marking — never substitute a non-safety capacitor in this position. Visually verify the markings match before powering on.\u003c\/p\u003e\n\u003ch4\u003eMKP62 305V X2 Specifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003ePart Number\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eMKP62 305V X2 (225K marking = 2.2µF, K tolerance)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eCapacitance\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003e2.2µF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eVoltage\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003e305VAC (X2 across-the-line rating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eTolerance\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003e±10% (K marking)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eSafety Class\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eX2 (live-to-neutral, fail-safe open)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eFunction\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eEMI filter \/ mains interference suppression\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eSubstitution Rule\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eX2-class only — never substitute a non-safety capacitor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eCondition\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eRelated PSU Input Stage \/ EMI Parts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sck2r55a-5a-ntc-cryptominer-power-thermistor-power-supply-repair\"\u003eSCK-2R55A 2.5Ω 5A NTC Inrush Thermistor\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/t10ah250v-ceramic-fuse-10a-250v-power-supply-repair\"\u003eT10AH250V 10A 250V Ceramic Fuse – PSU Input\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/t15ah250v-cartridge-ceramic-fuse-6x30mm-15a-250v-power-supply-psu-repair\"\u003eT15AH250V 15A 250V Ceramic Fuse – PSU Repair\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/450v-270uf-aluminum-electrolytic-capacitor-30x40mm-power-supply-unit-repair\"\u003e450V 270µF 30x40mm Aluminium Electrolytic – Bulk Capacitor\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eStocking MKP62 X2 capacitors for a PSU repair line? \u003ca href=\"mailto:contact@lys-sz.com\"\u003eContact us at contact@lys-sz.com\u003c\/a\u003e for volume pricing. Worldwide shipping from our Shenzhen warehouse.\u003c\/p\u003e","brand":"LYS Shenzhen","offers":[{"title":"Default Title","offer_id":42748470263987,"sku":null,"price":0.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6710\/4179\/files\/MKP62-305V-X2-225k-Film-Capacitor-Interference-Suppression.webp?v=1745160649","url":"https:\/\/lys-sz.com\/products\/mkp62-305v-x2-225k-film-capacitor","provider":"LYS Shenzhen","version":"1.0","type":"link"}