153 cartridge and axial lead fuses ?2008 littelfuse, inc. speci?cations are subject to change without notice. please refer to www.littelfuse.com for current information. revised: july 16, 2008 3ag > fast acting > 312/318 series 312/318 series speci?cations are subject to change without notice. please refer to http://www.littelfuse.com/series/312.html or 318.html for current information. 312/318 series lead-free 3ag, fast-acting fuse the 3ag fast-acting fuse solves a broad range of application requirements while offering reliable performance and cost-effective circuit protection. agency approvals agency agency file number ampere range ? u l e10480 au1410 312 series 10ma - 10a/ 318 series 31ma - 10a 312 series 12a - 30a ? ps e nbk040205- e10480b/f 312/318 series 1a - 10a e10480 318 series 12a - 30a su05001- 5005/5006/6005/6008 312/318 series 1a/ 1.25a / 1.6a/ 2a - 10a 312 series 10ma - 10a 318 series 31ma - 35a features electrical characteristics for series applications ? u l % of ampere rating ampere rating opening time 100% .01 C 35 4 hours, minimum 135% .01 C 35 1 hour, maximum 200% .01 C 10 5 sec., maximum 12 C 30 10 sec., maximum 35 20 sec., maximum rohs pb t * o b d d p s e b o d f x j u i 6 - standard 248-14 t " w b j m b c m f j o d b s u s j e h f and axial lead format and with various forming dimensions t 3 p ) 4 d p n q m j b o u b o e lead-free (except 10ma and 31ma rated items) used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. ? ps e description
154 cartridge and axial lead fuses ?2008 littelfuse, inc. speci?cations are subject to change without notice. please refer to www.littelfuse.com for current information. revised: july 16, 2008 3ag > fast acting > 312/318 series 312/318 series speci?cations are subject to change without notice. please refer to http://www.littelfuse.com/series/312.html or 318.html for current information. amp code ampere rating (a) max voltage rating (v) interrupting rating nominal cold resistance (ohms) nominal melting i 2 t (a 2 sec) agency approvals ? u l ps e ? .10 * 0.01 250 10ma ~ 1a 35a@250vac 10ka@125vac 177.4000 na x ** x ** x ** .031 * 0.031 250 23.6500 0. 0000300 x x x .062 0.062 250 24.7000 0.000249 x x x .100 0.1 250 11.2800 0.00102 x x x .125 0.125 250 7.1450 0.00289 x x x .150 0.15 250 5.1300 0.00550 x x x .175 0.175 250 3.8750 0.00960 x x x .187 0.187 250 3.4200 0.0128 x x x .200 0.2 250 3.0200 0.0165 x x x .250 0.25 250 2.0100 0.0355 x x x .300 0.3 250 1.4050 0.0689 x x x .375 0.375 250 0.8250 0.185 x x x .500 0.5 250 0.4980 0.483 x x x .600 .6 250 0.3620 0.880 x x x .750 0.75 250 0.2445 1.84 x x x 001 1 250 0.1900 0.760 x x x x x 1.25 1.25 250 1.25a ~ 3a 100a@250vac 10ka@125vac 0.1385 1.45 x x x x x 01.5 1.5 250 0.1036 2.35 x x x x 01.6 1.6 250 0.0934 2.80 x x x x x 1.75 1.75 250 0.0856 3.60 x x x x 01.8 1.8 250 0.0825 3.85 x x x x 002 2 250 0.0704 5.20 x x x x x 2.25 2.25 250 0.0594 7.20 x x x x x 02.5 2.5 250 0.0513 9.54 x x x x x 003 3 250 0.0427 14.0 x x x x x 004 4 250 4a ~ 10a 200a@250vac 10ka@125vac 0.0293 28.5 x x x x x 005 5 250 0.0224 50.0 x x x x x 006 6 250 0.0178 118.0 x x x x x 007 7 250 0.0146 118.0 x x x x x 008 8 250 0.0122 166.0 x x x x x 010 10 250 0.0093 298.0 x x x x x 012 12 32 12a ~ 35a 300a@32 vac 0.0072 234.6 x ** x *** x ** 015 15 32 0.0052 490.5 x ** x *** x ** 020 20 32 0.0035 1029 x ** x *** x ** 025 25 32 0.0024 2041 x ** x *** x ** 030 30 32 0.0019 3717 x ** x *** x ** 035 35 32 0.0013 7531 notes: n " b o e n " b s f o p u 3 p ) 4 d p n q p m b j o u b t u i f h m b t t c f b e d p o u b j o t 1 c ** 312 series only. refer to agency approvals section of this document. *** 318 series only. refer to agency approvals section of this document. electrical characteristic speci?cations by item
155 cartridge and axial lead fuses ?2008 littelfuse, inc. speci?cations are subject to change without notice. please refer to www.littelfuse.com for current information. revised: july 16, 2008 3ag > fast acting > 312/318 series 312/318 series speci?cations are subject to change without notice. please refer to http://www.littelfuse.com/series/312.html or 318.html for current information. average time current curves 1000 100 10 1 0.1 0.01 1 10 100 0.01 0.1 .031 a .062 a .125 a .250 a .375 a .500 a .750 a 1 a 1.5 a 2 a 2.5 a 3 a 4 a 5 a 6 a 7 a 8 a 10 a 0.005 time in seconds current in amperes 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) 5 z q j d b m * o e v t u s z 3 f d p n n f o e b u j p o
temperature minimum: 100 c temperature maximum: 150 c 1 s f i f b u 5 j n f 60-180 seconds solder pot temperature: 280 c maximum solder dwell time: 2-5 seconds recommended hand-solder parameters: 4 p m e f s * s p o 5 f n q f s b u v s f ? $ ? $ ) f b u j o h 5 j n f t f d p o e t n b y note: these devices are not recommended for ir or convection re?ow process. recommended process parameters:
156 cartridge and axial lead fuses ?2008 littelfuse, inc. speci?cations are subject to change without notice. please refer to www.littelfuse.com for current information. revised: july 16, 2008 3ag > fast acting > 312/318 series 312/318 series speci?cations are subject to change without notice. please refer to http://www.littelfuse.com/series/312.html or 318.html for current information. 312 series 318 series 6.35 (.25") 32.72 (1.288") 31.75 (1.25") 6.985 (.275") 0.813 (.032") 39.68 (1.56") 5 : 1 . standard length 12.70 (0.50) 5 : 1 short lead option axial lead material: tin coated copper product characteristics dimensions packaging packaging option quantity quantity & packaging code 312 series (cartridge type) bulk 5 vx bulk 100 ) 9 bulk 1000 mx bulk 1000 mxcc bulk 100 ) 9 $ $ 318 series (axial leaded) bulk 5 vx bulk 100 ) 9 bulk 1000 mx bulk 1000 mxsl materials body: glass cap: nickelCplated brass leads: tinCplated copper terminal strength . * - 4 5 % (
. f u i p e "
test condition a solderability 3 f g f s f o d f * & $ 4 f d p o e & e j u j p o 2003-01 annex a product marking cap1: brand logo, current and voltage ratings cap2: series and agency approval marks operating temperature o ? $ u p ? $ thermal shock . * - 4 5 % (
. f u i p e (
5 f t u $ p o e j u j p o # d z d m f t ? $ u p ? $
vibration . * - 4 5 % (
. f u i p e " humidity . * - 4 5 % (
. f u i p e #
5 f t u $ p o e j u j p o " ) j h i 3 )
and elevated temperature (40c) for 240 hours salt spray . * - 4 5 % (
. f u i p e %
test condition b part numbering system 0312 xxxx m x cc quantity code current rating code series refer to amp code column of electrical characteristics table option codes packaging code x = loose pack m = 1000 h = 100 v = 5 312 = cartridge 318 = axial leaded blank = standard item cc = color coded sl = short lead option (12.70 +/- 1.575 mm) p = rohs compliant and lead free indicator * for additional information or information about other available options, please contact littelfuse. *note: all 312 / 318 series fuses are now sold as rohs compliant and lead free by default, with or without the p indicator. measurements displayed in millimeters (inches)
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