revised: january 7, 2009 127 ? 2009 littelfuse, inc. speci?cations are subject to change without notice. radial lead fuses 262/268/269 series please refer to www.littelfuse.com/series/262.html, /268.html or /269.html for current information. micro? > very fast-acting > 262/268/269 series 262/268/269 description the 262/268/269 series are highCreliability micro fuses, with a 125v rating, very fast-acting type with high breaking capacity. this series is listed under the department of defense quality product list. agency approvals agency agency file number ampere range e10480 2ma - 5a lr 29862 2ma - 5a qp l fm07a 2ma - 5a features electrical characteristics applications qp l % of ampere rating ampere rating opening time 100% 1/500C15 4 hours, min. 200% 1/500C3/10 5 seconds, max. 4/10-5 2 seconds, max. ampere rating (a) amp code max voltage rating (v) interrupting rating nominal cold resistance (ohms) agency approvals qpl .002 .002 125 10,000 amperes at 125 vac/vdc 2000 xxx .005 .005 125 280 xxx .010 .010 125 94.0 xxx .015 .015 125 44.0 xxx .031 .031 125 16.45 xxx .050 .050 125 3.20 xxx .062 .062 125 2.25 xxx .100 .100 125 1.17 xxx .125 .125 125 1.0 xxx .200 .200 125 2.30 xxx .250 .250 125 1.75 xxx .300 .300 125 1.25 xxx .400 .400 125 0.227 xxx .500 .500 125 0.167 xxx .600 .600 125 0.140 xxx .700 .700 125 0.114 xxx .750 .750 125 0.104 xxx .800 .800 125 0.094 xxx 1.00 001. 125 0.100 xxx 01.5 01.5 125 0.063 xxx 2.00 002. 125 0.046 xxx 3.00 003. 125 0.034 xxx 4.00 004. 125 0.019 xxx 5.00 005. 125 0.018 xxx electrical characteristics please contact littelfuse for average time current curve. 262/268/269 series, micro? very fast-acting fuse (high-reliability) t . j m j u b s z h s b e f b w b j m b c m f t " w b j m b c m f g s p n w f s z m p x ampere of 2ma to 5a t " w b j m b c m f j o q m v h j o b o e radial leaded protection of electrical, electronic, and communication equipment having printed circuit boards (pcbs) usable in direct current (dc) and alternating current (ac) (up to 400 hertz (hz)) circuits capable of withstanding and functioning in extreme conditions found in spacecraft or military applications as described in mil-prf-23419.
revised: january 7, 2009 introduction to circuit protection introduction to circuit protection transientology 128 ? 2009 littelfuse, inc. speci?cations are subject to change without notice. radial lead fuses 262/268/269 series please refer to www.littelfuse.com/series/262.html, /268.html or /269.html for current information. micro? > very fast-acting > 262/268/269 series temperature rerating curve soldering parameters - wave soldering dwell t ime 0 20 4 0 60 80 100 120 1 4 0 160 180 200 220 2 4 0 260 280 300 0 10 20 30 4 0 5 0 60 70 80 90 100 110 120 130 1 4 0 1 5 0 160 170 180 190 200 210 220 230 2 4 0 t ime (seconds) t emperature (c) - measured on bottom side of board cooling t ime preheat t ime wave parameter lead-free recommendation preheat: (depends on flux activation temperature) (typical industry recommendation) temperature minimum: 100 c temperature maximum: 150 c preheat time: 60-180 seconds solder pot temperature: 260 c maximum solder dwell time: 2-5 seconds recommended hand-solder parameters: solder iron temperature: 350 c +/- 5c heating time: 5 seconds max. note: these devices are not recommended for ir or convection re?ow process. recommended process parameters: please contact littelfuse for average time current curve.
revised: january 7, 2009 129 ? 2009 littelfuse, inc. speci?cations are subject to change without notice. radial lead fuses 262/268/269 series please refer to www.littelfuse.com/series/262.html, /268.html or /269.html for current information. micro? > very fast-acting > 262/268/269 series 262/268/269 product characteristics materials gold-plated copper leads, type ii (fuse cap is also gold-plated) weight 262 and 269 series .36 grams; 268 series .48 grams lead pull force mil-std-202, method 211, test condition a (will withstand a 5 lb. axial pull test) aql (electrical characteristics) certified to 1% aql sampling per mil-std-105, inspection level ii traceability and identification records controlled by lot number and retained on file for a minimum of three years. copies of lot certification test data available when requested with order options special screening tests, burn-in, etc. can be supplied on special order to meet specific requirements product marking 262 / 268 series: brand logo, current and voltage ratings 269 series: brand logo, current and voltage ratings and agency approval mark operating temperature C55oc to +125oc shock (1/500): mil-std-202, method 213, test condition a (50 gs peak for 11 milliseconds). (1/200C5): mil- std-202, method 213, test condition i (100 gs peak for 6 milliseconds) vibration mil-std-202, method 201 (10C55 hz); mil-std-202, method 204, test condition c (55C2000 hz at 10 gs peak) salt spray mil-std-202, method 101, test condition b seal test mil-std-202, method 112, test condition a insulation resistance (after opening) mil-std-202, method 302, test condition a (1/2 megohm minimum) thermal shock mil-std-202, method 107, test condition b (C65oc to 125oc) moisture resistance mil-std-202, method 106 fuses to mil spec 262 series is available in fm07a on qpl for mil-prf-23419/7. to order, change 262 to 269 dimensions packaging part numbering system packaging option packaging speci?cation quantity quantity & packaging code bulk n / a 5 v 7.37 (.29") 4.32 (.17") 2.54 (.10") 5.97 (.235") 7.37 (.29") 25.4 (1.0") 2.54 (.10") 262 000 series 268 000 series 0262 xxxx v packaging code amp. code series refer to amp code column of electrical characteristics table v = 5
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