MODEL CW
Wirewound Resistors
Commercial Coated
FEATURES
• High performance for low cost
• High temperature silicone coating
• Complete welded construction
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MISSING INFO
• Excellent stability in operation
• High power/size ratio
STANDARD ELECTRICAL SPECIFICATIONS
POWER RATING
(Max. Hot Spot)
MAXIMUM*
WORKING VOLTAGE
MODEL
Characteristic U
+ 275°C
Characteristic V
+ 350°C
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: (- 55°C to + 350°C).
± 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®.
Vishay Dale 1122 23rd Street, Columbus, NE 68601-3647 • Phone (402) 563-6506 • Fax 402-563-6418 • Internet www.vishay.com
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