30 surface mount fuses thin-film surface mount 1206 smf very fast-acting thin-film type 429 series ?the 1206 smf is an extremely small, low profile design (1206 chip size) utilizing thin-film technology to achieve precise control of electrical characteristics. ?new one-piece element/termination design assures extra reliability by eliminating the need for soldering, welding or other joining operations in the manufacture of the fuse. ?semi-rigid substrate eliminates the potential for thermal shock fractures and decreases the risk of mechanical damage during pick and place operations. electrical characteristics: % of ampere opening rating time at 25 c 100% 4 hours, min imum 200% 5 seconds, max imum 300% 0.2 seconds, max imum agency approvals: recognized under the components program of underwriters laboratories and certified by csa. agency file numbers: ul e10480, csa lr 29862. interrupting ratings: 0.125 ?3a 50 amperes at rated voltage, vac/vdc 4 ?7a 35 amperes at rated voltage, vac/vdc environmental specifications: operating temperature: 55? to 125?. vibration: withstands 10 55 hz per mil-std-202f, method 201a and 10-2000 hz at 20 g s per mil-std-202f, method 204d, condition d. insulation resistance (after opening): greater than 10 kohm. resistance to soldering heat: withstands 60 seconds above 200? up to 260?, maximum. thermal shock: withstands 5 cycles of 55 to 125?. physical specifications: materials: body: epoxy substrate terminations: copper/nickel/tin-lead (95/5) cover coat: conformal coating soldering parameters: wave solder ?260?, 10 seconds maximum reflow solder ?260?, 30 seconds maximum packaging specifications: 8mm tape and reel per eia-rs481-2 (iec 286, part 3); 3,000 per reel, add packaging suffix, wr. patented ordering information: nominal nominal nominal catalog ampere marking voltage resistance voltage drop melting i 2 t number rating code rating cold ohms 1 (v) 2 (a 2 sec.) 3 429 .125 1/8 fb 125 2.30000 0.200 0.00020 429 .200 2/10 fc 125 0.93800 0.175 0.00055 429 .250 1/4 fd 125 0.62500 0.160 0.00100 429 .375 3/8 fe 125 0.37500 0.138 0.00280 429 .500 1/2 ff 63 0.24050 0.130 0.0060 429 .750 3/4 fg 63 0.13700 0.120 0.0170 429 001 1 fh 63 0.09950 0.115 0.035 429 1.25 1 1 / 4 fj 63 0.07475 0.108 0.065 429 01.5 1 1 / 2 fk 63 0.06250 0.101 0.125 429 1.75 1 3 / 4 fl 63 0.05000 0.096 0.150 429 002 2 fn 63 0.03975 0.093 0.230 429 02.5 2 1 / 2 fo 32 0.03065 0.087 0.50 429 003 3 fp 32 0.02625 0.080 0.70 429 004 4 fs 24 0.01926 0.070 1.5 429 005 5 ft 24 0.01375 0.065 2.7 429 007 7 fu 24 0.00925 0.060 3.6 1 measured at 10% of rated current, 25?. 2 measured at 100% of rated current, 25?. 3 measured at rated voltage. 0.001 0.01 0.1 1 .125a 0.1 1 10 100 .2a .25a .375a .5a .75a 1a 1.5a 1.75a 2a 2.5a 3a 4a 5a time in seconds current in amperes average time current curves reflow solder wave solder recommended pad layouts 0.150" 0.065" 0.060" 0.060" 0.080" 0.080" 0.190" .025" 0.045" .098" 0.060" .125" 0.045" .000 .006 .005 .005 .044" .010 .010 .010 .025" .010
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