215 ? 2009 littelfuse, inc. specifcations are subject to change without notice. axial lead & cartridge fuses 472 series please refer to www.littelfuse.com/series/472.html for current information. pico ? ll > time-lag > 472 series 472 series 472 series, pico ? ii, time-lag fuse description the 472 series pico ? ii, 125v rated time-lag fuse is designed for applications that require moderate in-rush withstand and is in a space-saving subminature package. agency approvals agency agency file number ampere range e10480 500ma - 5a features electrical characteristics applications % of ampere rating opening time 100% 4 hours, min. 200% 120 seconds, max. ampere rating (a) amp code max voltage rating (v) interrupting rating nominal cold resistance (ohms) nominal melting i 2 t (a 2 sec) agency approvals .500 .500 125 50 amperes at 125 vac and vdc 0.174 0.1927 x 1.00 001. 125 0.078 0.9384 x 1.50 01.5 125 0.039 2.4081 x 2.00 002. 125 0.027 4.2363 x 2.50 02.5 125 0.0209 7.0838 x 3.00 003. 125 0.0187 9.3600 x 5.00 005. 125 0.0084 45.9000 x electrical characteristics ? moderate inCrush withstand ? small size ? wide range of current ratings available (500ma to 5a) ? rohs compliant ? wide operating temperature range ? low temperature de-rating ? flatCpanel display tv ? lighting ? game console ? power supply ? audio/video equipment revised: july 28, 2011
introduction to circuit protection introduction to circuit protection transientology 216 ? 2009 littelfuse, inc. specifcations are subject to change without notice. axial lead & cartridge fuses 472 series please refer to www.littelfuse.com/series/472.html for current information. pico ? ll > time-lag > 472 series average time current curves temperature rerating curve soldering parameters 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 refow process. recommended process parameters: 100 10 1 0.1 0.01 0.001 0.1 11 0 100 1000 0.5a 1.0a 1.5a 2.0a 2.5a 3.0a 5.0a ti m e i n se co nd s cu rre nt i n am pe re s note: 1. derating depicted in this curve is in addition to the standard derating of 25% for continuous operation.
217 ? 2009 littelfuse, inc. specifcations are subject to change without notice. axial lead & cartridge fuses 472 series please refer to www.littelfuse.com/series/472.html for current information. pico ? ll > time-lag > 472 series 472 series material body: ceramic leads: tin-coated copper encapsulated: epoxy-coated body product marking body: brand logo, current rating, t (time lag fuse) solderability mil-std-202, method 208 lead pull force mil-std-202, method 211, test condition a (will withstand a 7lbs. axial pull test) product characteristics operating temperature C55oc to +125oc with proper deCrating thermal shock mil-std-202, method 213, test condition i (100 gs peak for 6 milliseconds) vibration mil-std-202, method 201 (10-55 hz); method 204, test condition c (55-2000 hz at 10 gs peak) dimensions packaging part numbering system packaging option packaging specifcation quantity quantity & packaging code *t1: 52.4mm (2.062) tape and reel eia 296 refer to the tables in part numbering system above f l 1 a t 2a 27.78 (1.094") 27.78 (1.094") 7.11 (.280") 62.7 (2.468") 52.4 (2.062")* 472 series markings 0.64 (.025") 2.80 (.11") 6.35 (.25") tape 5.0 (.197") 6.35 (.25") tape drawing es-001148 coating diameter (max): 0.5a-3.0a: 2.80mm 5.0a: 2.90mm 0472 xxxx n r t1 l rohs + hf lead length type of packaging quantity current rating series t1: 52.4mm (2.062?)* r = reel a = ammo pack x = loose pack n = 5000 m = 1000 ref er to amp c ode column of elec trical charac teristics t able notes: * t1 dimension is defned as the length of the component between the two tapes. the full component length is 62.7mm (2.468").
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