revised: january 7, 2009 329 ? 2009 littelfuse, inc. speci?cations are subject to change without notice. axial lead & cartridge fuses 325/326 series 3ab > time lag > 325/326 series please refer to www.littelfuse.com/series/325.html or /326.html for current information. 325/326 series 325/326 series lead-free 3ab, slo-blo ? fuse the 3ab slo-blo ? fuse with ceramic body construction permits higher interrupting ratings and voltage ratings. ideal for applications where high current loads are expected. agency approvals agency agency file number ampere range e10480 250ma - 10a e10480 12a - 30a lr 29862 250ma - 30a ps e nbk 030805- e10480a-f/ nbk 260106- jp1021a/b 1a - 30a su05010- 5012/6006/6007/7005 2.5a - 3.2a/ 7a - 30a 10ma - 30a features applications electrical characteristics for series % of ampere rating ampere rating opening time 100% 100ma C 30a 4 hours, minimum 135% 100ma C 30a 1 hour, maximum 200% 100ma C 3.2a 5 sec., min., 30 sec., max. 4a C 30a 5 sec., min., 60 sec., max. 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 used as supplementary protection in appliance or utilization equipment to provide individual protection for components or internal circuits. ps e description
revised: january 7, 2009 introduction to circuit protection introduction to circuit protection transientology 330 ? 2009 littelfuse, inc. speci?cations are subject to change without notice. axial lead & cartridge fuses 325/326 series 3ab > time lag > 325/326 series please refer to www.littelfuse.com/series/325.html or /326.html for current information. electrical characteristic speci?cations by item *higher i 2 t version available. 0325020.mxdp nominal i 2 t is 2507 a 2 sec 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 .010 0.01 250 100a@250vac 3324.8000 0.00148 x .031 0.031 250 332.5000 0.0110 x .062 0.062 250 91.7000 0.0276 x .100 0.1 250 33.5500 0.0870 x .125 0.125 250 22.4500 0.100 x .150 0.15 250 15.4500 0.143 x .175 0.175 250 8.9200 0.220 x .187 0.187 250 7.7250 0.230 x .200 0.2 250 6.7700 0.213 x .250 0.25 250 100a@250vac 10ka@125vac 10ka@125vdc 4.4300 0.432 x x x .300 0.3 250 3.2200 0.690 x x x .375 0.375 250 2.1550 1.20 x x x .400 0.4 250 1.9350 1.33 x x x .500 0.5 250 1.3000 2.50 x x x .600 0.6 250 0.9495 3.90 x x x .700 0.7 250 0.7215 6.42 x x x .750 0.75 250 0.6410 7.00 xxx .800 0.8 250 0.5725 8.20 x x x 001. 1 250 0.3890 16.3 x x x x 01.2 1.2 250 0.2860 22.0 x x x x 1.25 1.25 250 0.2680 24.0 x x x x 01.5 1.5 250 0.1975 40.1 x x x x 01.6 1.6 250 0.1760 45.0 x x x x 002. 2 250 0.1210 80.0 x x x x 02.5 2.5 250 0.0835 136.0 x xxxx 02.8 2.8 250 0.0695 170.0 x xxxx 003. 3 250 0.0605 200.0 x xxxx 03.2 3.2 250 100a@250vac 100ka@125vac 0.0539 214.0 x xxxx 004. 4 250 400a@250vac 10ka@125vac 0.0761 9.71 x x x x 005. 5 250 0.0522 25.0 x x x x 6.25 6.25 250 0.0346 60.4 x x x x 007. 7 250 0.0227 47.3 x xxxx 008. 8 250 0.0193 67.1 x xxxx 010. 10 250 0.0132 137 x xxxx 012. 12 250 400a@250vac 10ka@125vac 500a@60vdc 0.0067 129 xxx xx 012.* 12 250 0.0011 445 x x x 015. 15 250 0.0050 245 xxx xx 015.* 15 250 0.0083 760 x x x 020. 20 250 0.0034 575 xxx xx 020.* 20 250 0.0042 1900 xx x 025. 25 125 400a@125vac 10ka@60vdc 600a@125vdc 0.0024 1030 x x x x x 030. 30 125 0.0019 1690 x x x x x
revised: january 7, 2009 331 ? 2009 littelfuse, inc. speci?cations are subject to change without notice. axial lead & cartridge fuses 325/326 series 3ab > time lag > 325/326 series please refer to www.littelfuse.com/series/325.html or /326.html for current information. 325/326 series average time current curves 1000 100 10 1 0.1 0.01 10 current in amperes time in seconds 100 1000 0.1 1 0.05 5.0a 4.0a 3.5a 3.0a 2.5a 2.0a 1.5a 1.0a .750a .500a .375a 20.0a 15.0a 12.0a 10.0a 8.0a 7.0a 6.25a 30.0a 25.0a 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:
revised: january 7, 2009 introduction to circuit protection introduction to circuit protection transientology 332 ? 2009 littelfuse, inc. speci?cations are subject to change without notice. axial lead & cartridge fuses 325/326 series 3ab > time lag > 325/326 series please refer to www.littelfuse.com/series/325.html or /326.html for current information. materials body: ceramic cap: nickelCplated brass leads: tinCplated copper terminal strength mil-std-202g, method 211a, test condition a solderability reference iec 60127 second edition 2003-01 annex a product marking cap1: brand logo, current and voltage ratings cap2: series and agency approval marks operating temperature C55oc to +125oc thermal shock mil-std-202g, method 107g, test condition b:(5 cycles - 65oc to 125oc) vibration: mil-std-202g, method 201a humidity mil-std-202g, method 103b, test condition a: high rh (95%) and elevated temperature(40oc) for 240 hours salt spray mil-std-202g, method 101d, test condition b product characteristics dimensions packaging 326 000p series 325 000p series 6.35 (.25 " ) 32.72 (1.288 " ) 31.75 (1.25 " ) 6.985 (.275 " ) 38.1 (1.50 " ) typ. axial lead material: tin coated copper. 1 100 / 0.813 (.032 " ) ( -15a ) 1.016 (.040 " ) (20 -30a) packaging option packaging speci?cation quantity quantity & packaging code reel size 325 series bulk n/a 5 vx n/a bulk n/a 100 hx n/a bulk n/a 1000 mx n/a bulk n/a 1000 mx52 n/a bulk n/a 1000 mx52l n/a bulk n/a 1000 mxd n/a bulk n/a 1000 mxf31 n/a 326 series bulk n/a 5 vx n/a bulk n/a 100 hx n/a bulk n/a 1000 mx n/a bulk n/a 1000 mxcc n/a bulk n/a 1000 mxd n/a part numbering system 0325 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
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