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march 2013 fqd4n25 / fqu4n25 n-channel qfet mosfet 250 v, 3 a, 1.75? description this n-channel enhancement mode power mosfet is produced using fairchild semiconductor ? s proprietary planar stripe and dmos technology. this advanced mosfet technology has been especially tailored to reduce on-state resistance, and to provide superior switching performance and high avalanche energy strength. these devices are suitable for switched mode power supplies, active power factor correction (pfc), and electronic lamp ballasts. features ? 3 a, 250 v, r ds(on) = 1.75 ? (max) @v gs = 10 v, i d = 1.5 a ? low gate charge (typ. 4.3 nc) ? low crss (typ. 4.8 pf) ? 100% avalanche tested fqd4n25 / fqu4n25 n-channel mosfet ?2005 fairchild s emiconductor corporation f qd4n25 / fqu4n25 rev. c0 www.fairchildsemi.com

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########################## fqd4n25 / fqu4n25 n-channel mosfet ?2005 fairchild s emiconductor corporation f qd4n25 / fqu4n25 rev. c0 www.fairchildsemi.com
dimensions in millimeters mechanical dimensions d - pak fqd4n25 / fqu4n25 n-channel mosfet ?2005 fairchild s emiconductor corporation f qd4n25 / fqu4n25 rev. c0 www.fairchildsemi.com
mechanical dimensions dimensions in millimeters i - pak fqd4n25 / fqu4n25 n-channel mosfet ?2005 fairchild s emiconductor corporation f qd4n25 / fqu4n25 rev. c0 www.fairchildsemi.com
fqd4n25 / fqu4n25 n-channel mosfet ?2005 fairchild semiconductor corporation f qd 4n25 / fqu4n25 rev. c0 www.fairchildsemi.com trademarks the following includes registered and unregistered trademarks and service marks, owned by fairchild semiconductor and/or its gl obal subsidiaries, and is not intended to be an exhaustive list of all such trademarks. *trademarks of system general corporation, used under license by fairchild semiconductor. disclaimer fairchild semiconductor reserves the right to make changes with out further notice to any products herein to improve reliability, function, or design. fairchild does not assume any liability arising out of th e application or use of any product or circuit described herein; neither does it convey an y license under its patent rights, nor the rights of others. these specifications do not expand the terms of fairchilds wo rldwide terms and conditions , specifically the warranty therein, which covers these products. life support policy fairchilds products are not authorized fo r use as critical components in life support devices or systems without the express written approval of fairchild semiconductor corporation. as used here in: 1. life support devices or systems ar e devices or systems which, (a) are intended for surgical implant into the body or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a sign ificant injury of the user. 2. a critical component in any com ponent of a life support, device, or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. product status definitions definition of terms 2cool? accupower? ax-cap ? * bitsic? build it now? coreplus? corepower? crossvolt ? ctl? current transfer logic? deuxpeed ? dual cool? ecospark ? efficentmax? esbc? fairchild ? fairchild semiconductor ? fact quiet series? fact ? fast ? fastvcore? fetbench? fps? f-pfs? frfet ? global power resource sm green bridge? green fps? green fps? e-series? g max ? gto? intellimax? isoplanar? marking small speakers sound louder and better? megabuck? microcoupler? microfet? micropak? micropak2? millerdrive? motionmax? mwsaver? optohit? optologic ? optoplanar ? powertrench ? powerxs? programmable active droop? qfet ? qs? quiet series? rapidconfigure? saving our world, 1mw/w/kw at a time? signalwise? smartmax? smart start? solutions for your success? spm ? stealth? superfet ? supersot?-3 supersot?-6 supersot?-8 supremos ? syncfet? sync-lock? ?* tinyboost? tinybuck? tinycalc? tinylogic ? tinyopto? tinypower? tinypwm? tinywire? transic ? trifault detect? truecurrent ? * serdes? uhc ? ultra frfet? unifet? vcx? visualmax? voltageplus? xs? ? ? datasheet identification product status definition advance information for mative / in design datasheet contains the design specifications for product development. specifications may change in any manner without notice. preliminary first production datasheet contains preliminary data; supplementary data will be published at a later date. fairchild semiconductor reserves the ri ght to make changes at any time without notice to improve design. no identification needed full production datasheet contains final specifications. fair child semiconductor re serves the right to make changes at any time without notice to improve the design. obsolete not in production datasheet contains specifications on a product t hat is discontinued by fairchild semiconductor. the datasheet is for reference information only. anti-counterfeiting policy fairchild semiconductor corporations anti-c ounterfeiting policy. fairchilds anti-count erfeiting policy is also stated on our external website, www.fairchildsemi.com, under sales support . counterfeiting of semiconductor parts is a growing problem in the industry. all manuf actures of semiconductor products are expe riencing counterfeiting of their parts. customers who inadv ertently purchase counterfeit parts experience many problems such as loss of brand reputation, substa ndard performance, failed application, and increased cost of producti on and manufacturing delays. fairchild is taki ng strong measures to protect ourselve s and our customers from the proliferation of counterfeit parts. fairchild strongly encourages customers to purchase fairchild parts either directly from fa irchild or from authorized fairchild distributors who are listed by country on our web page cited above. product s customers buy either from fairchild directly or fr om authorized fairchild distributors are genuine parts, have full traceability, meet fairchilds quality standards for handing and storage and provide access to fairchilds full range of up-to-date technical and product information. fairchild and our authorized distributors will stand behind all warranties and wi ll appropriately address and warranty issues that may arise. fairchil d will not provide any warranty coverage or other assistance for pa rts bought from unau thorized sources. fairchild is committed to combat this global problem and encourage our customer s to do their part in stopping th is practice by buying direct or from authorized distributors. rev. i64 ?

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