Commercial Discrete Vishay Ultronix Commercial Discrete Wirewound Resistors Axial and Radial Models FEATURES * High precision * All welded construction * Molded thermosetting plastic bobbin * Wide ohmic range combined with tight tolerance * Excellent long-term stability * Inherent low temperature coefficient * Extremely low Thermal EMF * Low voltage coefficient * Low noise RADIAL AXIAL STANDARD ELECTRICAL SPECIFICATIONS MODELS MAXIMUM RESISTANCE VALUE (Ohms) POWER RATING @ 125C (Watts) 123A 111k 0.05 118A 192k 0.05 122A 199k 0.05 102A 334k 0.10 102AL 334k 0.10 101A 410k 0.10 153A 435k 0.10 103A 633k 0.10 135A 750k 0.10 105A 820k 0.125 184A 820k 0.125 185A* 961k 0.125 202A 968k 0.25 204A 1.42 M 0.25 203A 1.7 M 0.25 205A* 1.93 M 0.33 207A* 3.0 M 0.50 308A 3.0 M 0.60 210A* 4.10 M 0.50 307A 5.63 M 0.60 310A 7.68 M 1.00 505A 10 M 1.00 510A* 24 M 1.25 515A* 35 M 1.50 517A 43 M 1.75 520A* 43 M 2.00 101P 453k 0.125 102P 821k 0.125 203PC 1.59 M 0.25 203PA 1.48 M 0.25 305PA 3.3 M 0.50 505PA 9.5 M 1.00 ELECTRICAL SPECIFICATIONS Minimum Values: 0.1 ohm for 1% and 0.5%. 10 ohm for 0.1% and tighter. Resistance Tolerance: 0.005%, 0.01%, 0.02%, 0.05%, 0.1%, 0.5%, and 1%, depending on style and value. Temperature Coefficient: 10 ppm/C standard for 10 ohm and above. Higher T. C.'s on low ohmic values. T. C. match to 1 ppm/C. High T. C.'s up to + 6000 ppm/C are available. Standard temperature range: - 10C to + 80C. Working temperature range: - 60C to + 145C. CONSTRUCTION All Welded Construction: The combination of all welded construction and compatible materials provide the most reliable means of interconnects possible. Butt Weld of Tab to Lead: A tab material of 800 ohm alloy (the same as the resistance wire) is butt welded to the lead and molded deep into the resistor bobbin. This design parameter assures the least possible D. C. transients due to thermal EMF. Bobbin Design: The ratio of the height of the Pi wall to the width of the Pi and to the diameter of the bobbin mandrel are critical to the basic stability of a wirewound resistor. These parameters are optimized for each wire size, wattage size and range of resistor values. Encapsulation Material: Both the bobbin and the final encapsulation material are thermosetting alkyd polyester. The resulting resistor is virtually a homogeneous mass with an identical coefficient of expansion which is unaffected by the most violent of temperature cycling. All types are unaffected by application of solvents. Lead Materials: The standard lead material is hot solder dipped copper (C5N). Other available materials are bare nickel (N1N) and gold plated nickel (N2N). * Available in hermetically sealed. See page 7. Document Number: 69101 Revision 06-Oct-00 www.vishay.com 5 Commercial Discrete Commercial Discrete Wirewound Resistors Vishay Ultronix DIMENSIONS in inches [millimeters] Axial Models A 1 1/4 [31.75] MIN. B RADIAL AXIAL DIMENSIONS .020 [.508] O LEADS MODEL DIAMETER A LENGTH B C D AWG DIAMETER 123A 118A 122A 102A 102AL 101A 153A 103A 105A 135A 184A 185A 202A 204A 203A 205A 207A 308A 210A 307A 310A 505A 510A 515A 517A 520A 101P 102P 203PC 203PA 305PA 505PA 0.100 [2.54] 0.130 [3.30] 0.123 [3.12] 0.110 [2.79] 0.130 [3.30] 0.130 [3.30] 0.150 [3.81] 0.150 [3.81] 0.160 [4.06] 0.150 [3.81] 0.187 [4.75] 0.187 [4.75] 0.250 [6.35] 0.250 [6.35] 0.250 [6.35] 0.250 [6.35] 0.250 [6.35] 0.312 [7.93] 0.250 [6.35] 0.375 [9.53] 0.375 [9.53] 0.500 [12.70] 0.500 [12.70] 0.500 [12.70] 0.500 [12.70] 0.500 [12.70] 0.300 [7.62] 0.250 [6.35] 0.250 [7.92] 0.270 [6.86] 0.375 [9.53] 0.500 [12.70] 0.230 [5.84] 0.180 [4.57] 0.218 [5.54] 0.250 [6.35] 0.313 [7.95] 0.375 [9.53] 0.245 [6.22] 0.300 [7.62] 0.500 [12.70] 0.310 [7.87] 0.375 [9.53] 0.500 [12.70] 0.310 [7.87] 0.375 [9.53] 0.343 [8.71] 0.500 [12.70] 0.750 [19.05] 0.810 [20.57] 1.00 [25.40] 0.750 [19.05] 1.00 [25.40] 0.500 [12.70] 1.00 [25.40] 1.50 [38.10] 1.75 [44.45] 2.00 [50.8] 0.320 [8.13] 0.250 [6.35] 0.312 [7.93] 0.320 [8.13] 0.500 [12.70] 0.500 [12.70] -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0.150 [3.81] 0.125 [3.18] 0.150 [3.81] 0.200 [5.08] 0.200 [5.08] 0.300 [7.62] -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0.110 [2.79] 0.125 [3.18] -- -- -- -- 24* 26 24 24 24 22* 22 22 22 22 22 22 22 20 20 20* 20* 20 20 20 20 20 20 20 20 20 22 22* 22 22 20 20 0.020 [0.508] 0.016 [0.406] 0.020 [0.508] 0.020 [0.508] 0.020 [0.508] 0.026 [0.660] 0.026 [0.660] 0.026 [0.660] 0.026 [0.660] 0.026 [0.660] 0.026 [0.660] 0.026 [0.660] 0.026 (0.660) 0.032 [0.813] 0.032 [0.813] 0.032 [0.813] 0.032 [0.813] 0.032 [0.813] 0.032 [0.813] 0.032 [0.813] 0.032 [0.813] 0.032 [0.813] 0.032 [0.813] 0.032 [0.813] 0.032 [0.813] 0.032 [0.813] 0.026 [0.660] 0.026 [0.660] 0.026 [0.660] 0.026 [0.660] 0.032 [0.813] 0.032 [0.813] Round Radial Models Flat Radial Models O Leads A D B C A B C O Leads * Different lead gauges available - Contact Factory for part number. PART MARKING -- ULTRONIX Logo -- Model -- Resistance value -- Resistance tolerance -- Date code www.vishay.com 6 ORDERING INFORMATION 203A MODEL 1000 RESISTANCE VALUE T TOLERANCE T Q A B F = = = = = 0.01% 0.02% 0.05% 0.1% 1.0% Document Number: 69101 Revision 06-Oct-00