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Commercial Styles Semi-Precision Power Wirewound Resistors Weldable and solderable leads High thermal conductivity, centerless ground ceramic cores for optimum heat distribution and dissipation T / NT Wirewound Series • • • • • 0.1Ω to 300KΩ 0.75 to 14 watts ±0.1% to ±10% tolerance Non-inductive windings available Meets or exceeds all applicable MIL-R-26 ratings Silicone coat All welded construction Electrical Data Similar To MIL-R-26 Style Similar to MIL-PRF-39007 Style 1 --- T-1/2-A81 U V Min Ω Max KΩ Maximum Working Voltage --- 0.75 --- 0.1 4 54.8 RW81 RWR81 1 1.0 --- 0.1 4.5 67.1 T-1A-70 RW70 --- 1.0 --- 0.1 12 109.5 T-1-80 RW80 RWR80 1 2.0 --- 0.1 12 154.9 T-2A* --- --- 3.0 3.75 0.1 25 306.2 T-2A-69 RW69 --- --- 3.0 0.1 20 244.9 T-2B-79 RW79 RWR89 1 3.0 --- 0.1 40 346.4 T-3 --- --- 4.0 5.5 0.1 38 457.2 T-5* --- --- 5.0 6.5 0.1 45 540.8 RW74 RWR74 / 84 1 5.0 --- 0.1 94 685.5 --- --- 6.0 7.5 0.1 65 698.2 RW67 --- --- 6.5 0.1 92 773.3 --- --- 7.0 9.0 0.1 115 1017.3 T-7A-55 RW55 --- --- 7.0 0.1 200 1183.2 T-10A-56 RW56 --- --- 14.0 0.1 300 2049.4 --- --- 10.0 13.0 0.1 300 1974.8 T-10-78 RW78 RWR78 1 10.0 --- 0.1 300 1732 T-10-68 RW68 --- --- 11.0 0.1 300 1816.6 IRC Style T-1/2 T-5-74 T-6 T-6-67 T-7* T-10* Wattage Rating Resistance Range (Ω) * Available as radial lead = type TR. Designate non-inductive winding by adding the prefix "N" to style. 1 The RWR is obsolete. The listed parts correspond to the commercial equivalent parts that are manufactured with the same procedures but lack the burn-in screening that is required by MIL-PRF-39007 General Note IRC reserves the right to make changes in product specification without notice or liability. All information is subject to IRC’s own data and is considered accurate at time of going to print. Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com A subsidiary of TT electronics plc T / NT Wirewound Series Issue January 2010 Sheet 1 of 4 Commercial Styles Semi-Precision Power Wirewound Resistors Physical Data A Length B Diameter C Diameter 1 ½” (38.1mm) Minimum Lead Length Dimensions (Inches and (mm)) IRC / Shallcross Style A B C Inches mm Inches mm Inches (±0.002) mm (±0.05) T-1/2 0.330 (±0.062) 8.4 (±1.6) 0.078 (±0.031) 2.0 (±0.8) 0.020 0.5 T-1/2-A81 0.250 (±0.032) 6.4 (±0.8) 0.085 (±0.020) 2.2 (±0.5) 0.020 0.5 T-1A-70 0.406 (±0.032) 10.3 (±0.8) 0.094 (±0.032) 2.4 (±0.8) 0.020 0.5 T-1-80 0.406 (±0.032) 10.3 (±0.8) 0.094 (±0.032) 2.4 (±0.8) 0.020 0.5 T-2A 0.500 (±0.062) 12.7 (±1.6) 0.187 (±0.031) 4.8 (±0.8) 0.032 0.8 T-2A-69 0.500 (±0.063) 12.7 (±1.6) 0.188 (±0.063) 4.8 (±1.6) 0.032 0.8 T-2B-79 0.560 (±0.062) 14.2 (±1.6) 0.187 (±0.031) 4.8 (±0.8) 0.032 0.8 T-3 0.625 (±0.062) 15.8 (±1.6) 0.250 (±0.062) 6.3 (±1.6) 0.040 1.0 T-5 0.875 (±0.062) 22.2 (±1.6) 0.312 (±0.062) 7.9 (±1.6) 0.040 1.0 T-5-74 0.875 (±0.062) 22.2 (±1.6) 0.312 (±0.062) 7.9 (±1.6) 0.040 1.0 T-6 1.000 (±0.062) 25.4 (±1.6) 0.312 (±0.062) 8.0 (±1.6) 0.040 1.0 T-6-67 1.000 (±0.094) 25.4 (±2.4) 0.313 (±0.063) 8.0 (±1.6) 0.032 0.8 T-7 1.185 (±0.062) 30.0 (±1.6) 0.312 (±0.062) 8.0 (±1.6) 0.040 1.0 T-7A-55 1.375 (±0.094) 35.0 (±2.4) 0.469 (±0.094) 12 (±2.4) 0.032 0.8 T-10A-56 2.000 (±0.094) 50.8 (±2.4) 0.469 (±0.094) 12 (±2.4) 0.032 0.8 T-10 1.812 (±0.062) 46.0 (±1.6) 0.375 (±0.062) 9.5 (±1.6) 0.040 1.0 T-10-78 1.780 (±0.062) 45.2 (±1.6) 0.375 (±0.062) 9.5 (±1.6) 0.040 1.0 T-10-68 1.875 (±0.063) 47.6 (±1.6) 0.344 (±0.094) 8.7 (±2.4) 0.032 0.8 Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com T / NT Wirewound Series Issue January 2010 Sheet 3 of 4
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