HPW Series High Precision Welded Axial and Radial Commercial Resistors Tested to Mil-PRF-39005 F e at u r e s • Group A testing in accordance with MILPRF-39005 specifications available • 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 S e r i e s S p e c i f i c at i o n s Max. Type Ohms 118A 192k 102A 334k 101A 410k 153A 435k 103A 633k 105A 820k 184A 820k 185A* 961k 202A 968k 203A 1.7 M 205A* 1.93 M 207A* 3.0 M 308A 3.0 M 210A* 4.10 M 307A 5.63 M 310A 7.68 M 505A 10 M 510A* 24 M 515A* 35 M 517A 43 M 520A* 43 M 203PA 1.48 M 305PA 3.3 M *Available in hermetically sealed Power Rating @125°C (Watts) 0.05 0.10 0.10 0.10 0.10 0.125 0.125 0.125 0.25 0.25 0.33 0.50 0.60 0.50 0.60 1.00 1.00 1.25 1.50 1.75 2.00 0.25 0.50 Max. Volts 150 150 300 150 300 300 200 200 400 800 800 800 800 800 1200 1200 1200 150 characteristics Minimum Values 0.1Ω for ±1% and ±0.5%; 10Ω for ±0.1% and tighter Resistance ±0.005%, ±0.01%, ± 0.02%, ±0.05%, ±0.1%, ±0.5%, Tolerance and ±1%, depending on style and value Temperature ±10ppm/°C standard for 10Ω and above. Higher TC’s Coefficient (TCR on low ohmic values. TC match to ±1ppm/°C. High TC’s upto +6000ppm/°C are available Working tempera- –60°C to +150°C ture range All Welded The combination of all welded construction and comConstruction patible materials provide the most reliable means of interconnects possible. Butt Weld of Tab to A tab material of 800 ohm alloy (the same as the Terminal resistance wire) is butt welded to the terminal and molded deep into the resistor bobbin. This design parameter assures the least possible DC 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 Both the bobbin and the final encapsulation material 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. Terminal Materials The standard terminal material is hot solder dipped copper (C5N). Military Group A MIL-PRF-39005 testing Burn In/Conditioning including Thermal Shock DC Resistance Visual/Mechanical Inspection Short Time Overload (continued) 126 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected] HPW Series High Precision Welded Axial and Radial Commercial Resistors Tested to Mil-PRF-39005 dimensions (±.020 in./ ±.508 mm) Axial 1.25" / 31.75mm min. B A C Power Rating A 0.05 0.10 0.10 0.10 0.10 0.130 / 3.30 0.110 / 2.79 0.130 / 3.30 0.150 / 3.81 0.150 / 3.81 B Model Type 118A 102A 101A 153A 103A Round Radial A Dim. C 203PA 0.200 / 5.08 305PA 0.200 / 5.08 505PA 0.300 / 7.62 105A 184A 185A* 202A 203A 0.125 0.125 0.125 0.25 0.25 310A 505A 510A* 515A* 517A 1.00 1.00 1.25 1.50 1.75 205A* 207A* 308A 210A* 307A 520A* 203PA 305PA 0.160 0.187 0.187 0.250 0.250 0.33 0.50 0.60 0.50 0.60 0.250 0.250 0.312 0.250 0.375 / / / / / / / / / / B 4.06 4.75 4.75 6.35 6.35 6.35 6.35 7.93 6.35 9.53 0.375 / 9.53 0.500 / 12.70 0.500 / 12.70 0.500 / 12.70 0.500 / 12.70 2.00 0.25 0.50 0.500 / 12.70 0.270 / 6.86 0.375 / 9.53 *Available in hermetically sealed 0.180 0.250 0.375 0.245 0.300 / / / / / AWG 4.57 6.35 9.53 6.22 7.62 0.500 / 12.70 0.375 / 9.53 0.500 / 12.70 0.310 / 7.87 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 0.500 / 12.70 H O W TO ORDER 203MA1M700T Type Military Group A “M” characteristic does not indicate product is QPL to Mil-PRF-39005 Format* Resistance A = axial 1R000 = 1Ω PA = round radial 10R00 = 10 Ω 100R0 = 100 Ω *All formats and 1K000 = 1000 Ω tolerances not 10K00 = 10 KΩ available in all 100K0 = 100 KΩ values 1M700 = 1.7 MΩ Tolerance* V = 0.005% T = 0.01% Q = 0.02% A = 0.05% B = 0.1% C = 0.25% D = 0.5% F = 1.0% Conversion of RBR to Commercially-tested Product RBR52 RBR53 RBR54 RBR55 RBR56 RBR71 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected] 310MAxxxxxx 307MAxxxxxx 207MAxxxxxx 205MAxxxxxx 203MAxxxxxx 203MPAxxxxxx 127 26 24 22 22 22 22 22 22 22 20 20 20 20 20 20 20 20 20 20 20 20 22 20 Lead Diam. 0.016 0.020 0.026 0.026 0.026 0.026 0.026 0.026 0.026 0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.032 0.032 / / / / / / / / / / / / / / / / / / / / 0.406 0.508 0.660 0.660 0.660 0.660 0.660 0.660 0.660 0.813 0.813 0.813 0.813 0.813 0.813 0.813 0.813 0.813 0.813 0.813 0.032 / 0.813 0.026 / 0.660 0.032 / 0.813