CW
,
CWP
coat insulated, precision coat insulated
miniature wirewound leaded resistors
EU
features
•
Flameproof silicone coating
equivalent (UL94V0)
•
Suitable for automatic machine insertion
•
Marking: Blue-gray body color with color-coded bands
Precision: Color-coded bands and alpha-numeric
black marking
•
Products with lead-free terminations meet EU RoHS
and China RoHS requirements
dimensions and construction
t
D
L
Ceramic Core
l
t
d
Type
CW1/4
CW1/2
CW1
Marking
Resistive
Wire
End
Cap
Lead
Wire
CW1X
CW1P
CW2
CW2X
CW2P
CW3
CW3X
CW3P
CW5
CW1S
.945±.059
(24.0±1.5)
.256±.039
(6.5±1.0)
.039
(1.0)
.591±.039
(15.0±1.0)
.472±.039
(12.0±1.0)
.374±.039
(9.5±1.0)
L
.13±.012
(3.3±0.3)
.256±.039
(6.5±1.0)
Dimensions
inches
(mm)
t (max.)
D
d (nom.)
.02
(0.5)
.039
(1.0)
.075±.012
(1.9±0.3)
.098±.039
(2.5±1.0)
.138±.039
(3.5±1.0)
.138
+.039
-0
(3.5
+1.5
)
-0
.138±.039
(3.5±1.0)
.157±.039
(4.0±1.0)
.118
(3.0)
.157
+.039
-0
(4.0
+1.5
)
-0
.157±.039
(4.0±1.0)
.236±.039
(6.0±1.0)
.236
+.039
-0
(6.0
+1.5
)
-0
.236±.039
(6.0±1.0)
.354±.039
(9.0±1.5)
.098±.039
(2.5±1.0)
.024
(0.6)
1.50±.118
(38.0±3.0)
1.18±.118
(30.0±3.0)
.031
(0.8)
1.18±.118
(30.0±3.0)
.018
(0.45)
.024
(0.6)
l
Insulation Coating
ordering information
New Part #
CW
Type
1/2
Power
Rating
1/4: 0.25W
1/2: 0.5W
1: 1W
2: 2W
3: 3W
5: 5W
P
Style
Nil: Power
P: Precision
S: Small
X: Power
C
Termination
Material
C: SnCu
T52
Taping and
Forming
Axial: T26, T52,
T521, T631
Stand-off Axial:
L52A, L52B
Radial: VTP, GT
L forming
A
Packaging
A: Ammo
R: Reel
103
Nominal Resistance
±2%, ±5%: 2 significant
figures + 1 multiplier
“R” indicates decimal
on value <10Ω
±1%: 3 significant
figures + 1 multiplier
“R” indicates decimal
on value <100Ω
F
Tolerance
C: ±0.25%
D: ±0.5%
F: ±1%
G: ±2%
J: ±5%
K: ±10%
For further information
on packaging, please
refer to Appendix C.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
12/30/08
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
127
resistors
CW
,
CWP
resistors
coat insulated, precision coat insulated
miniature wirewound leaded resistors
applications and ratings
Part
Designation
CW1/4
CW1/2
CW1
CW2
CW3
CW5
CW1X
CW2X
CW3X
CW1S
CW1P
CW2P
CW3P
Power
Rating
0.25W
0.5W
1.0W
2.0W
3.0W
5.0W
1.0W
2.0W
3.0W
1.0W
1.0W
2.0W
3.0W
±250
±90:
R≥10Ω*
±50: R<10Ω
—
1 - 100
1 - 390
1 - 390
—
0.47 - 220
0.47 - 390
0.47 - 390
—
0.1 - 430
0.1 - 390
0.1 - 390
—
—
—
+25°C
—
±500
—
—
—
—
±250
—
—
—
T.C.R.
(ppm/°C)
Max.
Resistance Range (Ω)
E-24, E-96
(C±0.25%)
E-24, E-96
(D±0.5%)
E-24, E-96
(F±1%)
E-24
(G±2%)
—
0.1 - 390
0.1 - 390
0.1 - 390
0.1 - 390
E-24
(J±5%)
0.47 - 15
0.1 - 100
0.1 - 390
0.1 - 390
0.1 - 390
0.1 - 390
0.01 - 0.091 0.01 - 0.091
0.01 - 0.091 0.01 - 0.091
0.01 - 0.091 0.01 - 0.091
0.1 - 100
0.1 - 100
—
+70°C
-40°C
to
+155°C
E-24
(K±10%)
0.47 - 15
0.1 - 100
Rated
Operating
Ambient Temperature
Temperature
Range
* T.C.R. = 20ppm/°C available on request
environmental applications
Derating Curve
CW
100
% Rated Power
80
60
40
20
0
-40
0
40
160 200
80
120
70
155
Ambient Temperature
(°C)
240
280
275
100
% Rated Power
80
60
40
20
0
-40
0
25
40
160 200
155
Ambient Temperature
(°C)
80
120
240
280
275
Temperature Rise (°C)
250
200
150
100
50
0
0
25
50
75
100
CW1, CW1P
CW1/2
CW1/4
Surface Temperature Rise
CWP
300
CW5
CW3, CW3P
CW2, CW2P
% Rated Power
Performance Characteristics
Parameter
Resistance
T.C.R.
Requirement
∆
R ±(% + 0.05Ω)
Limit
Typical
—
—
0.8: CW,CWX 0.4: CWP
1.8: CW1S
0.18:CWP(R<10Ω)
0.8: CW, CW1S, CWX
0.4: CWP
0.18: CWP (R<10Ω)
4: CW, CW1S, CWX
1.6: CWP
0.45: CWP (R<10Ω)
4: CW, CW1S, CWX
1.6: CWP
0.45: CWP (R<10Ω)
Test Method
25°C
CW: Room temperature/100°C up
CWP: +25°C/-40°C and +25°C/+155°C
CW,CWX,CW1S: Power rating x 10 for 5 seconds
CWP: Power rating x 6.25 for 5 seconds
CWP:R<10Ω: Power rating x 5 for 5 seconds*
350°C ± 10°C for 3.5 seconds or 260°C ± 5°C
for 10 seconds
Power rating x 1/10, 40°C, 90 - 95% RH, 1000 hours,
1.5 hr ON, 0.5 hr OFF cycle
70°C, 1000 hours (CW, CWX, CW1S),
25°C, 1000 hours (CWP)
1.5 hr ON, 0.5 hr OFF cycle
After immersing the sample in IPA for 3 min., the resistor
surface should be wiped with a dry cloth (velvet or gauze)
12/01/08
Within regulated tolerance
±250ppm/°C: CW
±90, 20ppm/°C: CWP, R≥10
±50ppm/°C: CWP, R<10
1: CW,CWX
0.5: CWP
2: CW1S
0.2: CWP(R<10Ω)*
1: CW, CW1S, CWX
0.5: CWP
0.2: CWP (R<10Ω)*
5: CW, CW1S, CWX
2: CWP
0.5: CWP (R<10Ω)*
5: CW, CW1S, CWX
2: CWP
0.5: CWP (R<10Ω)*
No evidence of damage to
protective coating and marking
Overload (Short Time)
Resistance to Solder Heat
Moisture Resistance
Endurance @ 70°C
Resistance to Solvent
—
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
128
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
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