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| CW Vishay Dale Wirewound Resistors, Commercial Coated, Axial Lead FEATURES * * * * * High performance for low cost High temperature silicone coating Complete welded construction Excellent stability in operation High power to size ratio STANDARD ELECTRICAL SPECIFICATIONS MODEL POWER RATING* P25C W Characteristic U Characteristic V + 250C + 350C 0.5 1.0 1.0 4.0 3.0 3.0 4.0 2.5 2.5 5.0 4.0 5.0 7.0 10.0 10.0 -- -- -- 5.5 3.75 3.75 6.0 3.25 3.25 6.5 5.0 6.5 9.0 13.0 13.0 RESISTANCE RANGE WEIGHT (Maximum) g 0.21 0.34 0.3 2.1 0.65 0.7 0.9 1.8 1.2 4.2 4.2 4.2 4.7 9.0 9.0 5%, 10%** 0.1 - 1.77k 0.1 - 6.37k 0.1 - 3.3k 0.1 - 28.7k 0.1 - 12k 0.1 - 15k 0.1 - 6k8 0.1 - 19.9k 0.1 - 19.9k 0.1 - 58.5k 0.1 - 40.3k 0.1 - 58.5k 0.1 - 95.2k 0.1 - 167k 0.1 - 167k CW-1/2 CW-1 CW-1M CW-2 CW-2M CW-2B CW-2B-13 CW-2C CW-2C-14 CW-5 CW-5-2 CW-5-3 CW-7 CW-10 CW-10-3 *Vishay Dale CW models have two power ratings, depending on operating temperature and stability requirements. **3% tolerance available. * Shaded areas indicate most popular models. TECHNICAL SPECIFICATIONS PARAMETER Temperature Coefficient Dielectric Withstanding Voltage Short Time Overload Terminal Strength Maximum Working Voltage Operating Temperature Range Power Rating UNIT ppm/C VAC lb V C CW RESISTOR CHARACTERISTICS 90 for below 1.0, 50 for 1.0 to 9.9, 30 for 10 and above 1000 5 x rated power for 5 seconds for 3.75 watt size and smaller, 10 x rated power for 5 seconds for 4 watt size and greater 10 minimum (P x R)1/2 Characteristic U = - 65/+ 250, Characteristic V = - 65/+ 350 Characteristic U = + 250C max. hot spot temperature, 0.5% max. R in 2000 hr. load life Characteristic V = + 350C max. hot spot temperature, 3.0% max. R in 2000 hr. load life ORDERING INFORMATION CW-5 MODEL 3k RESISTANCE 5% TOLERANCE % www.vishay.com 26 For technical questions, contact ww2aresistors@vishay.com Document Number 30215 Revision 18-Oct-02 CW Wirewound Resistors, Commercial Coated, Axial Lead DIMENSIONS 1.50 [38.10]* Minimum A C Vishay Dale MODEL A CW-1/2 D DIMENSIONS in inches [millimeters] B (Maximum)** 0.281 [7.14] 0.437 [11.10] 0.311 [7.90] 0.765 [19.43] 0.562 [14.27] 0.622 [15.80] 0.563 [14.30] 0.593 [15.06] 0.593 [15.06] 1.0 [25.40] 1.0 [25.40] 1.0 [25.40] 1.281 [32.54] 1.875 [47.62] 1.875 [47.62] C D 0.250 0.031 [6.35 0.787] 0.406 0.031 [10.31 0.787] 0.285 0.025 [7.24 0.635] 0.625 0.062 [15.87 1.57] 0.500 0.062 [12.70 1.57] 0.562 0.062 [14.27 1.57] 0.500 0.062 [12.70 1.57] 0.500 0.062 [12.70 1.57] 0.500 0.062 [12.70 1.57] 0.875 0.062 [22.22 1.57] 0.875 0.062 [22.22 1.57] 0.875 0.062 [22.22 1.57] 1.218 0.062 [30.94 1.57] 1.781 0.062 [45.24 1.57] 1.781 0.062 [45.24 1.57] 0.085 0.020 0.020 0.002 [2.16 0.508] [0.508 0.051] 0.094 0.031 0.020 0.002 [2.39 0.787] [0.508 0.051] 0.110 0.015 0.020 0.002 [2.79 0.381] [0.508 0.051] .250 0.032 0.040 0.002 [6.35 0.813] [1.02 0.051] 0.185 0.015 0.032 0.002 [4.70 0.381] [0.813 0.051] 0.188 0.032 0.032 0.002 [4.78 .813] [0.813 0.051] 0.188 0.032 0.032 0.002 [4.78 0.813] [0.813 0.051] 0.218 0.032 0.040 0.002 [5.54 0.813] [1.02 0.051] 0.218 0.032 0.032 0.002 [5.54 .813] [0.813 0.051] 0.312 0.032 0.040 0.002 [7.92 0.813] [1.02 0.051] 0.250 0.032 0.032 0.002 [6.35 .813] [0.813 0.051] 0.312 0.032 0.032 0.002 [7.92 0.813] [0.813 0.051] 0.312 0.032 0.040 0.002 [7.92 0.813] [1.02 0.051] 0.375 0.032 0.040 0.002 [9.52 0.813] [1.02 0.051] 0.375 0.032 0.032 0.002 [9.52 0.813] [0.813 0.051] B CW-1 CW-1M CW-2 CW-2M CW-2B CW-2B-13 CW-2C CW-2C-14 CW-5 CW-5-2 CW-5-3 *On some standard reel pack methods, the leads may be trimmed to a shorter length than shown. MATERIAL SPECIFICATIONS Element: Copper-nickel alloy or nickel-chrome alloy, depending on resistance value Core: Ceramic: Steatite or alumina, depending on physical size Coating: Special high temperature silicone Standard Terminals: Tinned Copperweld(R) End Caps: Stainless steel Part Marking: DALE, Model, Wattage*, Value, Tolerance, Date Code *Wattage marked on resistor will be "V" characteristic, CW-1/2 will not be marked with wattage RATED POWER IN % 120 100 80 60 CHAR. V 40 20 0 -65 -50 CW-7 CW-10 CHAR. U CW-10-3 0 25 50 150 250 350 AMBIENT TEMPERATURE IN C Derating **B (Maximum) dimension is clean lead to clean lead. PERFORMANCE* TEST Thermal Shock Short Time Overload Dielectric Withstanding Voltage Low Temperature Storage High Temperature Exposure Moisture Resistance Shock, Specified Pulse Vibration, High Frequency Load Life Terminal Strength CONDITIONS OF TEST Rated power applied until thermally stable, then a minimum of 15 minutes at - 55C 5 x rated power (3.75 watt and smaller), 10 x rated power (4 watt and larger) for 5 seconds 1000V rms, one minute - 65C for 24 hours 250 hours at + 350C MIL-STD-202 Method 106, 7b not applicable MIL-STD-202 Method 213, 100g's for 6 milliseconds, 10 shocks Frequency varied 10 to 2000Hz, 20g peak, 2 directions 6 hours each 2000 hours at rated power, + 25C, 1.5 hours "ON", 0.5 hours "OFF" 5 to 10 second 10 pound pull test; torsion test - 3 alternating directions, 360 each TEST LIMITS (CHARACTERISTIC V) (2.0% + 0.05) R (2.0% + 0.05) R (0.1% + 0.05) R (2.0% + 0.05) R (4.0% + 0.05) R (2.0% + 0.05) R (0.2% + 0.05) R (0.2% + 0.05) R (3.0% + 0.05) R (1.0% + 0.05) R *All R figures shown are maximum, based upon testing requirements per MIL-PRF-26 at a maximum operating temperature of + 350C. R maximum figures are considerably lower when tested at a maximum operating temperature of + 250C. Document Number 30215 Revision 18-Oct-02 For technical questions, contact ww2aresistors@vishay.com www.vishay.com 27 |
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