MODEL CW Wirewound Resistors Commercial Coated FEATURES * High performance for low cost * High temperature silicone coating * Complete welded construction MEMO TO DIV: PLEASE FILL IN MISSING INFO * Excellent stability in operation * High power/size ratio STANDARD ELECTRICAL SPECIFICATIONS POWER RATING (Max. Hot Spot) MAXIMUM* WORKING VOLTAGE MODEL Characteristic U + 275C Characteristic V + 350C RESISTANCE RANGE (Ohms) CW-1/2 .5 W -- 0.1 - 1.54k .21 19.6 V -- CW-1 1.0 W -- 0.1 - 5.50k .34 45.9 V -- CW-1M 1.0 W -- 0.1 - 3.30k .30 37.4 V -- CW-2 4.0 W 5.5 W 0.1 - 28.7k 2.1 200.0 V 235.0 V CW-2M 3.0 W 3.75 W 0.1 - 8.38k .65 83.0 V 116.0 V CW-2B 3.0 W 3.75 W 0.1 - 15k .70 125.0 V 140.0 V CW-2C 2.5 W 3.25 W 0.1 - 19.9k 1.6 130.0 V 150.0 V CW-2C-14 2.5 W 3.25 W 0.1 - 19.9k 1.6 130.0 V 150.0 V CW-5 5.0 W 6.5 W 0.1 - 58.5k 4.2 320.0 V 365.0 V CW-5-2 4.0 W 5.0 W 0.1 - 40.3k 4.2 240.0 V 265.0 V CW-5-3 5.0 W 6.5 W 0.1 - 58.5k 4.2 320.0 V 365.0 V CW-7 7.0 W 9.0 W 0.1 - 95.2k 4.7 460.0 V 520.0 V CW-10 10.0 W 13.0 W 0.1 - 167k 9.0 765.0 V 875.0 V CW-10-3 10.0 W 13.0 W 0.1 - 167k 9.0 765.0 V 875.0 V MAXIMUM WEIGHT (Grams) Characteristic U + 275 C Characteristic V + 350 C *Maximum working voltage determined at .0008" [.020mm] diameter wire resistance values. Note: Shaded areas indicate most popular models. ELECTRICAL SPECIFICATIONS MECHANICAL SPECIFICATIONS Resistance Tolerance: 5% standard 1 ohm and above. 10% standard below 1 ohm. 3% available. Terminal Strength: 10 pound pull test. Temperature Coefficient: (- 55C to + 350C). 90PPM/C below 1 ohm. 50PPM/C 1 ohm to 9.9 ohm. 30PPM/C 10 ohm and above. Short Time Overload: 5 seconds at 5 times rated power for 3.75 watt size and smaller. 5 seconds at 10 times rated power for 4 watt size and larger. Dielectric Strength: 1000 VAC minimum. Solderability: 60/40 electro tin plated terminals to facilitate soldering. MATERIAL SPECIFICATIONS Core: Ceramic: Steatite or alumina, depending on physical size. Element: Copper-nickel alloy or nickel-chrome alloy, depending on resistance value. End Caps: Stainless steel. Coating: Special high temperature silicone. Standard Terminals: Tinned Copperweld(R). Vishay Dale 1122 23rd Street, Columbus, NE 68601-3647 * Phone (402) 563-6506 * Fax 402-563-6418 * Internet www.vishay.com Major Vishay Brands Dale * Draloric * Foil Resistors * Measurements Group * Roederstein * Sfernice * Sprague * Thin Film * Vitramon MODEL CW DIMENSIONAL CONFIGURATIONS [Numbers in brackets indicate millimeters] 1.50 [38.10] Min. A D B C B MODEL A (Max.) C D CW-1/2 .250 .031 [6.35 .787] .281 [ 7.14] .085 .020 [2.16 .508] .020 .002] [.508 .051] CW-1 .406 .031 [10.31 .787] .437 [11.10] .094 .031 [2.39 .787] .020 .002 [.508 .051] CW-1M .285 .025 [7.24 .635] .311 [7.90] .110 .015 [2.79 .381] .020 .002 [.508 .051] CW-2 .625 .062 [15.87 1.57] .765 [19.43] .250 .032 [6.35 .813] .040 .002 [1.02 .051] CW-2M .500 .062 [12.70 1.57] .562 [14.27] .185 .015 [4.70 .381] .032 .002 [.813 .051] CW-2B .562 .062 [14.27 1.57] .622 [15.80] .188 .032 [4.78 .813] .032 .002 [.813 .051] CW-2C .500 .062 [12.70 1.57] .593 [15.06] .218 .032 [5.54 .813] .040 .002 [1.02 .051] CW-2C-14 .500 .062 [12.70 1.57] .593 [15.06] .218 .032 [5.54 .813] .032 .002 [.813 .051] CW-5 .875 .062 [22.22 1.57] 1.0 [25.40] .312 .032 [7.92 .813] .040 .002 [1.02 .051] CW-5-2 .875 .062 [22.22 1.57] 1.0 [25.40] .250 .032 [6.35 .813] .032 .002 [.813 .051] CW-5-3 .875 .062 [22.22 1.57] 1.0 [25.40] .312 .032 [7.92 .813] .032 .002 [.813 .051] CW-7 1.218 .062 [30.94 1.57] 1.281 [32.54] .312 .032 [7.92 .813] .040 .002 [1.02 .051] CW-10 1.781 .062 [45.24 1.57] 1.875 [47.62] .375 .032 [9.52 .813] .040 .002 [1.02 .051] CW-10-3 1.781 .062 [45.24 1.57] 1.875 [47.62] .375 .032 [9.52 .813] .032 .002 [.813 .051] DERATING TEST DALE MAXIMUM Temperature Coefficient 90PPM/C below 1 50PPM/C 1 to 9.9 30PPM/C 10 and above Thermal Shock (2% + .05) R Short Time Overload (2% + .05) R Dielectric (.1% + .05) R Low Temperature Storage (2% + .05) R High Temperature Exposure (4% + .05) R % OF RATED POWER ENVIRONMENTAL PERFORMANCE * 120 100 80 CHAR. V 60 40 CHAR. U 20 0 25 75 125 175 225 275 325 AMBIENT TEMP. DEG. CENTIGRADE 375 Moisture Resistance (2% + .05) R POWER RATING Shock (.2% + .05) R Dale(R) CW Models have two power ratings, depending on operating temperature and stability requirements. Vibration (.2% + .05) R Load Life (3% + .05%) R Terminal Strength (1% + .05) R CHARACTERISTIC U: 1. + 275C maximum hot spot temperature. 2. .5% maximum R in 2000 hour load life. * All R figures shown are maximum, based upon testing requirements per CHARACTERISTIC V: 1. + 350C maximum hot spot temperature. 2. 3% maximum R in 2000 hour load life. MIL-R-26 at a maximum operating temperature of + 350C. R maximum figures are considerably lower when tested at a maximum operating temperature of + 275C. PART MARKING -- Dale -- Model -- Value -- Tolerance -- Date code HOW TO ORDER PACKAGING CW-5 3 3k 5% MODEL STYLE RESISTANCE TOLERANCE See Packaging Methods - Wirewound Resistors at the back of the catalog. Some standard reel pack methods trim the leads to a shorter length than shown in the Dimensional Outline. Vishay Dale 1122 23rd Street, Columbus, NE 68601-3647 * Phone (402) 563-6506 * Fax 402-563-6418 * Internet www.vishay.com Major Vishay Brands Dale * Draloric * Foil Resistors * Measurements Group * Roederstein * Sfernice * Sprague * Thin Film * Vitramon