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*
P
25
°
C
W
Characteristic U
Characteristic V
+ 250
°
C
+ 350
°
C
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
Ω
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
V
AC
-
lb
V
°C
-
CW RESISTOR CHARACTERISTICS
±
90 for below 1.0Ω,
±
50 for 1.0Ω to 9.9Ω,
±
30 for 10Ω 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 = + 250°C max. hot spot temperature,
±
0.5% max.
∆R
in 2000 hr. load life
Characteristic V = + 350°C max. hot spot temperature,
±
3.0% max.
∆R
in 2000 hr. load life
ORDERING INFORMATION
CW-5
MODEL
3k
Ω
RESISTANCE
Ω
5%
TOLERANCE
±
%
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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
®
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 - 55°C
5 x rated power (3.75 watt and smaller), 10 x rated power (4 watt and larger) for 5 seconds
1000V rms, one minute
- 65°C for 24 hours
250 hours at + 350°C
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, + 25°C, 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% + 0.05Ω)
∆R
±
(2.0% + 0.05Ω)
∆R
±
(0.1% + 0.05Ω)
∆R
±
(2.0% + 0.05Ω)
∆R
±
(4.0% + 0.05Ω)
∆R
±
(2.0% + 0.05Ω)
∆R
±
(0.2% + 0.05Ω)
∆R
±
(0.2% + 0.05Ω)
∆R
±
(3.0% + 0.05Ω)
∆R
±
(1.0% + 0.05Ω)
∆R
*All
∆R
figures shown are maximum, based upon testing requirements per MIL-PRF-26 at a maximum operating temperature of + 350°C.
∆R
maximum figures are considerably lower when tested at a maximum operating temperature of + 250°C.
Document Number 30215
Revision 18-Oct-02
For technical questions, contact ww2aresistors@vishay.com
www.vishay.com
27
