revised: january 7, 2009 227 ? 2009 littelfuse, inc. speci?cations are subject to change without notice. axial lead & cartridge fuses 316 series please refer to www.littelfuse.com/series/316.html for current information. pico ? ll > very fast acting > 316 series 316 series 316 series pico ? ii, very fast-acting fuse description the 316 series pico ? ii very fast-acting fuse is designed to meet an extensive array of performance characteristics in a space-saving subminiature package while complying with the requirements of ccc. agency approvals agency agency file number ampere range 2007010207241295 0.50maC5a features applications electrical characteristics % of ampere rating opening time 100% 4 hours, min. 200% 5 seconds, max. 275% 0.30 seconds, max. 400% 0.03 seconds, max. 1000% 0.004 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) max voltage drop (mv) agency approvals 0.50 .500 125 50a @ 125vac 50a @ 125vdc 0.280 0.0598 0.202 x 1.00 001. 125 0.128 0.256 0.186 x 2.00 002. 125 0.0473 0.405 0.158 x 3.15 3.15 125 0.0290 1.190 0.160 x 5.00 005. 125 0.0155 4.140 0.110 x electrical characteristics t $ $ $ d f s u j m f e " y j b m - f b e and cartridge fuse t ' v m m z d p n q b u j c m f x j u i leadCfree solder alloys and higher temperature pro?les associated with leadCfree assembly t 3 p ) 4 d p n q m j b o u t " w b j m b c m f j o s b u j o h t p g 0.50a, 1.00a, 2.00a, 3.15a and 5.00 amperes notes: 1. cold resistance measured at less than 10% of rated current at 23c. 2. agency approval table key: x=approved or certi?ed, p=pending and blank=not approved 3. have special electrical characteristic needs? contact littelfuse to learn more about application speci?c options. t ' m b u o q b o f m % j t q m b z 5 7 t - $ % n p o j u p s t - $ % c b d l m j h i u j o w f s u f s t 0 g m d f n b d i j o f t t 1 p x f s t v q q m z t " v e j p 7 j e f p t z t u f n t - j h i u j o h t z t u f n t . f e j d b m f r v j q n f o u secondary protection for space constrained applications
revised: january 7, 2009 introduction to circuit protection introduction to circuit protection transientology 228 ? 2009 littelfuse, inc. speci?cations are subject to change without notice. axial lead & cartridge fuses 316 series please refer to www.littelfuse.com/series/316.html for current information. pico ? ll > very fast acting > 316 series note: 1. derating depicted in this curve is in addition to the standard derating of 25% for continuous operation. average time current curves 100 10 1 0.1 0.01 0.001 10 100 1000 0.1 1 time in seconds current in amperes 3. 5 a 5 .0 a 1.0 a 2.0 a 0. 5 a temperature rerating curve 140 120 100 80 60 40 20 ambient temperature percent of rating* -60c -40c -20c 0c 20c 40c 60c 80c 100c 120c -76f -40f -4f 32f 68f 104f 140f 176f 212f 248f b b 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: 10 seconds, maximum 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:
revised: january 7, 2009 229 ? 2009 littelfuse, inc. speci?cations are subject to change without notice. axial lead & cartridge fuses 316 series please refer to www.littelfuse.com/series/316.html for current information. pico ? ll > very fast acting > 316 series 316 series f l 1 a 27.78 (1.094") 27.78 (1.094") 7.11 (.280") 62.7 (2.468") 52.4 (2.062")* front and back markings epoxy coating 0.64 (.025") 2.80 (.11") 6.35 (.25") tape 5.0 (.197") 6.35 (.25") tape dimensions packaging part numbering system packaging option packaging speci?cation quantity quantity & packaging code *t1: 52.4mm (2.062") axial lead tape and reel or ammo pack eia 296 5000 nat1 = 5000 ammo pack t1 nrt1 = 5000 tape & reel t1 0316 001. n r t1 lead length type of packaging quantity code current rating serie s t1: 52.4mm (2.062)* r = reel a = ammo pack n = 5000 refer to amp code column of electrical characteristics table notes: * t1 dimension is de?ned as the length of the component between the two tapes. the full component length is 62.7mm (2.468"). materials body: ceramic leads: tin-coated copper encapsulated: epoxy-coated body product marking body: brand logo, current rating certi?cation mark lead pull force mil-std-202, method 211, test condition a (will withstand a 7lbs. axial pull test) solderability mil-std-202, method 208 product characteristics operating temperature C55oc to +125oc with proper de-rating shock mil-std-202, method 213, test condition 1 (100gs peak for millisecond) vibration mil-std-202f, method 201a (10-55 hz); method 204, test condition c moisture resistance mil-std-202, method 106
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