a subsidiary of tt electronics plc general note irc reserves the right to make changes in product speci?cation without notice or liability. all information is subject to ircs own data and is considered accurate at time of going to print. t series wirewound and film technologies division 736 greenway road ? boone, north carolina 28607-1860 ? tel: 828-264-8861 ? fax: 828-264-8866 ? www.irctt.com all welded construction silicone coat weldable and solderable leads high thermal conductivity, centerless ground ceramic cores for optimum heat distribution and dissipation. ? 0.1 ohm to 300k ohms ? 0.75 to 14 watts ? 0.1% to 10% tolerance 0.1% to 10% tolerance ? non-inductive windings available ? lead-/free, rohs compliant construction available style similar to mil-r-26 style wattage rating resistance range (ohms) u v min ? max k? t-1/2 - - - 0.7 - - - 0.1 4 t-1/2-a81 rw81 1 - - - 0.1 4.5 t-1a rw70 1 - - - 0.1 12 t-1a-71 rw70 1 - - - 0.1 12 t-1c rw80 2 - - - 0.1 12 t-1-80 rw80 2 - - - 0.1 12 t-2a - - - 3 3.7 0.1 25 t-2a-69 rw69 - - - 3 0.1 20 t-2b-79 rw79 3 - - - 0.1 40 t-3 - - - 4 5.5 0.1 38 t-5 - - - 5 6.5 0.1 45 t-5-74 rw74 5 - - - 0.1 94 t-6 - - - 6 7.5 0.1 65 t-6-67 rw67 5 6.5. 0.1 92 t-7 - - - 7 9 0.1 115 t-7a-55 rw55 - - - 7 0.1 200 t-10a-56 rw56 - - - 14 0.1 300 t-10 - - - 10 13 0.1 300 t-10-78 rw78 10 - - - 0.1 300 t-10-67 rw67 - - - 11 0.1 300 * to designate non-inductive winding, add pre?x "n" to style characteristic u = -55c to +275c characteristic v = -55c to +350c 20 ppm/c 10 ? up 50 ppm/c 1.0 ? to 9.9 ? 400 ppm/c 0.50 ? to 0.999 ? 650 ppm/c 0.1 ? to 0.490 ? available from -30 ppm/c to +6000 ppm/c temperature range for special tc's -50c to +150c 1000 megohms minimum dry at 100 volts dc wattage rating based on operation at 25c derate to zero at 275c & 350c for "u" and "v" temperature range standard temperature coef?cient special temperature coef?cients insulation resistance derating t series general specifications: lead material: tinned copperweld is standard. specifications: commercial styles semi-precision power wirewound
issue preliminary 1105 general note irc reserves the right to make changes in product speci?cation without notice or liability. all information is subject to ircs own data and is considered accurate at time of going to print. wirewound and film technologies division 736 greenway road ? boone, north carolina 28607-1860 ? tel: 828-264-8861 ? fax: 828-264-8866 ? www.irctt.com t-1/2 t-1/2-a81 t-1a t-1a-70 t-1-80 t-1c t-2a t-2a-69 t-2b-79 t-3 t-5 t-5-74 t-6 t-6-67 t-7 t-7a-55 t-10a-56 t-10 t-10-78 t-10-68 inches 0.330 (0.062) 0.250 (0.032) 0.406 (0.032) 0.406 (0.032) 0.406 (0.032) 0.280 (0.062) 0.500 (0.062) 0.500 (0.063) 0.560 (0.062) 0.625 (0.062) 0.875 (0.062) 0.875 (0.062) 1.000 (0.062) 1.000 (0.094) 1.185 (0.062) 1.375 (0.094) 2.000 (0.094) 1.812 (0.062) 1.780 (0.062) 1.875 (0.063) irc/shallcross style mm 8.4 (1.6) 6.4 (0.8) 10.3 (1.6) 10.3 (0.8) 10.3 (0.8) 7.1 (1.6) 12.7 (1.6) 12.7 (1.6) 14.2 (1.6) 15.8 (1.6) 22.2 (1.6) 22.2 (1.6) 25.4 (1.6) 25.4 (2.4) 30.0 (1.6) 35.0 (2.4) 50.8 (2.4) 46.0 (1.6) 45.2 (1.6) 47.6 (1.6) inches 0.078 (0.031) 0.085 (0.020) 0.093 (0.032) 0.094 (0.032) 0.094 (0.032) 0.093 (0.031) 0.187 (0.031) 0.188 (0.063) 0.187 (0.031) 0.250 (0.062) 0.312 (0.062) 0.312 (0.062) 0.312 (0.062) 0.313 (0.063) 0.312 (0.062) 0.469 (0.094) 0.469 (0.094) 0.375 (0.062) 0.375 (0.062) 0.344 (0.094) mm 2.0 (0.8) 2.2 (0.5) 10.3 (1.6) 2.4 (0.8) 2.4 (0.8) 2.4 (0.8) 4.8 (0.8) 4.8 (1.6) 4.8 (0.8) 6.3 (1.6) 7.9 (1.6) 7.9 (1.6) 8.0 (1.6) 8.0 (1.6) 8.0 (1.6) 12 (2.4) 12 (2.4) 9.5 (1.6) 9.5 (1.6) 8.7 (2.4) inches (0.002) 0.020 0.020 0.020 0.020 0.020 0.020 0.032 0.032 0.032 0.040 0.040 0.040 0.040 0.032 0.040 0.032 0.032 0.040 0.040 0.032 mm (0.05) 0.5 0.5 0.5 0.5 0.5 0.5 0.8 0.8 0.8 1.0 1.0 1.0 1.0 0.8 1.0 0.8 0.8 1.0 1.0 0.8 c b a a length c diameter b diameter 1 1/2" (38.1mm) minimum lead length how to order: sample part no.: t-2b79 u 4 9r9 1% style characteristic resistance value tolerance 0.1%, 0.5%, 1% lead-free construction lf
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