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313 axial lead & cartridge fuses 3ag > fast acting > 312/318 series 312/318 series ? 2009 littelfuse, inc. specifications are subject to change without notice. please refer to www.littelfuse.com/series/312.html or /318.html for current information. 312/318 series 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 e10480 au1410 312 series: 10ma - 10a/ 318 series: 31ma - 10a 312 series: 12a - 30a lr 29862 312 series: 10ma - 30a 318 series: 31ma - 10a 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 - 10a features electrical characteristics for series applications % of ampere rating ampere rating opening time 100% 10ma C 35a 4 hours, minimum 135% 10ma C 35a 1 hour, maximum 200% 10ma C 10a 5 sec., maximum 12a C 30a 10 sec., maximum 35a 20 sec., maximum t *obddpsebodfxjui6- standard 248-14 t "wbjmbcmfjodbsusjehf and axial lead format and with various forming dimensions t 3p)4dpnqmjbouboe 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 revised: september 10, 2010
introduction to circuit protection introduction to circuit protection transientology 314 axial lead & cartridge fuses 3ag > fast acting > 312/318 series 312/318 series ? 2009 littelfuse, inc. specifications are subject to change without notice. please refer to www.littelfuse.com/series/312.html or /318.html for current information. amp code ampere rating (a) voltage rating (v) interrupting rating nominal cold resistance (ohms) nominal melting i 2 t (a 2 sec) agency approvals ps e .10 * 0.01 250 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 001.1250 0.19000.760x xxxx 1.25 1.25 250 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 xxxx 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 xxxx 2.25 2.25 250 0.0594 7.20 x xxxx 02.5 2.5 250 0.0513 9.54 x xxxx 003. 3 250 0.0427 14.0 x xxxx 004. 4 250 200a@250vac 10ka@125vac 0.0293 28.5 x xxxx 005. 5 250 0.0224 50.0 x xxxx 006.6250 0.0178118.0x xxxx 007.7250 0.0146118.0x xxxx 008. 8 250 0.0122 166.0 x xxxx 010. 10 250 0.0093 298.0 x xxxx 012. * 12 32 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"boen"bsfopu3p)4dpnqpmbjoubtuifhmbttcfbedpoub jot1c ** for 318 series 12a to 30a, the agency approval is only curus. electrical characteristic specifications by item
315 axial lead & cartridge fuses 3ag > fast acting > 312/318 series 312/318 series ? 2009 littelfuse, inc. specifications are subject to change without notice. please refer to www.littelfuse.com/series/312.html or /318.html for current information. 312/318 series 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) 5zqjdbm*oevtusz3fdpnnfoebujpo
temperature minimum: 100 c temperature maximum: 150 c 1sfifbu5jnf 60-180 seconds solder pot temperature: 260 c maximum solder dwell time: 2-5 seconds recommended hand-solder parameters: 4pmefs*spo5fnqfsbuvsf?$?$ )fbujoh5jnftfdpoetnby note: these devices are not recommended for ir or convection reflow process. recommended process parameters: 1mfbtfdpoubdu-juufmgvtfgpsnpsfefubjmtpouiptf5$$vswft pgpuifsbnqfsf ratings which are not published.
introduction to circuit protection introduction to circuit protection transientology 316 axial lead & cartridge fuses 3ag > fast acting > 312/318 series 312/318 series ? 2009 littelfuse, inc. specifications are subject to change without notice. please refer to 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 materials body: glass cap: nickelCplated brass leads: tinCplated copper terminal strength .*-45%( .fuipe" test condition a solderability 3fgfsfodf*&$4fdpoe&ejujpo 2003-01 annex a product marking cap1: brand logo, current and voltage ratings cap2: series and agency approval marks operating temperature o?$up?$ thermal shock .*-45%( .fuipe( 5ftu$poejujpo# dzdmft?$up?$
vibration .*-45%( .fuipe" humidity .*-45%( .fuipe# 5ftu$poejujpo")jhi3)
and elevated temperature (40c) for 240 hours salt spray .*-45%( .fuipe% test condition b part numbering system 0312 m x p xxxx lead-free packaging code quantity code amp code series x = filler m = 1000 refer to amp code column of electrical characteristics table measurements displayed in millimeters (inches) packaging option packaging specification quantity quantity & packaging code taping width 312 series bulk n/a 1000 mx n/a bulk n/a 100 )9 n/a 318 series bulk n/a 1000 mx n/a bulk n/a 100 )9 n/a bulk n/a 1000 mxb n/a

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