32 surface mount fuses thin-film surface mount slimline 1206 very fast-acting thin-film type 433 series the slimline 1206 is an extremely small, low profile design (1206 chip size) utilizing thin-film technology to achieve precise control of electrical characteristics. the lower height profile produces a flat surface for improved performance in pick-and-place operations and an alternate solution for height critical application. mounting pad and electrical specification are identical to the popular 429 series specifications. 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 .375a 50 a @ 125 v ac/dc 0.5 2a 50 a @ 63 v ac/dc 2.5 3a 50 a @ 32 v ac/dc environmental specifications: operating temperature: 55 c to 90 c. consult tempera- ture rerating chart on page 4. for operation above 90 c contact littelfuse. vibration: per mil-std-202f. insulation resistance (after opening): greater than 10,000 ohms. resistance to soldering heat: withstands 60 seconds above 200 c up to 260 c, maximum. shelf life (solderability): 1 year min. thermal shock: withstands 5 cycles of 55 to 125 c. physical specifications: materials: body: epoxy substrate terminations: copper/nickel/tin-lead (95/5) cover coat: conformal coating soldering parameters: wave solder 260 c, 10 seconds maximum infrared solder 260 c, 30 seconds maximum packaging specifications: 8mm tape and reel per eia-rs481-2 (iec 286, part 3); 5,000 per reel, add packaging suffix, nr. patents: patent pending ordering information: nominal catalog ampere marking voltage resistance melting i 2 t number rating code rating cold ohms 1 (a 2 sec.) 2 0433 .125 .125 b 125 3.45 0.00040 0433 .200 .200 c 125 0.938 0.00055 0433 .250 .250 d 125 0.625 0.0010 0433 .375 .375 e 125 0.375 0.0028 0433 .500 .50 f 63 0.2405 0.0060 0433 .600 .60 .6 63 0.2100 0.0131 0433 .750 .75 g 63 0.1370 0.0170 0433 .800 .80 .8 63 0.1225 0.0305 0433 001. 1.0 h 63 0.09950 0.0350 0433 1.25 1.25 j 63 0.07475 0.0650 0433 01.5 1.5 k 63 0.06250 0.125 0433 1.75 1.75 l 63 0.05000 0.150 0433 002. 2.0 n 63 0.03975 0.230 0433 02.5 2.5 o 32 0.03065 0.50 0433 003. 3.0 p 32 0.02625 0.70 1 measured at 10% of rated current, 25 c. 2 measured at rated voltage. time in seconds current in amperes 0.01 0.1 0.1 1 1 10 100 10 100 0.001 3a 2.5a 2a 1.75a 1.5a 1.25a 1a .8a .75a .6a .5a .375a .25a 2.03 (.080") 2.03 (.080") wave solder reflow solder 3.81 (.150") 1.5 2 (.060") .58 (.023") .56 (.022") .64 (.025") (4) 1.14 (.045") marking code varies with amperage rating (see chart) sn /pb sn /pb 1.2 7 (.050") 1.5 2 (.060") 3.18 (.125") 3.18 (.125") 4.83 (.190") 1.6 5 (.065") 1.5 2 (.060") average time current curves reference dimensions:
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