coat insulated, precision coat insulated
d
D
Marking
Insulation Coating
End
Cap
Lead
Wire
L l
t t
Ceramic Core
Resistive
Wire
EU
miniature wirewound leaded resistors
features
• Flameproof silicone coating
• Suitable for automatic machine insertion
• Marking: Blue-gray body color with color-coded bands
• Products with lead-free terminations meet EU RoHS
dimensions and construction
CW,CWP
equivalent (UL94V0)
Precision: Color-coded bands and alpha-numeric
black marking
and China RoHS requirements
Dimensions inches (mm)
Type t (max.) D d (nom.) l
CW1/4
CW1/2
CW1
CW1X
CW1P
CW2
CW2X
CW2P
CW3
CW3X
CW3P
CW5
CW1S
L
.13±.012
(3.3±0.3)
.256±.039
(6.5±1.0)
.374±.039
(9.5±1.0)
.472±.039
(12.0±1.0)
.591±.039
(15.0±1.0)
.945±.059
(24.0±1.5)
.256±.039
(6.5±1.0)
.02
(0.5)
.039
(1.0)
.118
(3.0)
.039
(1.0)
.075±.012
(1.9±0.3)
.098±.039
(2.5±1.0)
.138±.039
(3.5±1.0)
+.039
.138
-0
+1.5
(3.5
)
-0
.138±.039
(3.5±1.0)
.157±.039
(4.0±1.0)
+.039
.157
-0
+1.5
(4.0
)
-0
.157±.039
(4.0±1.0)
.236±.039
(6.0±1.0)
+.039
.236
-0
+1.5
(6.0
)
-0
.236±.039
(6.0±1.0)
.354±.039
(9.0±1.5)
.098±.039
(2.5±1.0)
.018
(0.45)
.024
(0.6)
.031
(0.8)
.024
(0.6)
resistors
1.18±.118
(30.0±3.0)
1.50±.118
(38.0±3.0)
1.18±.118
(30.0±3.0)
ordering information
New Part #
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
CW 1/2 P C
Power
Rating
1/4: 0.25W
1/2: 0.5W
1: 1W
2: 2W
3: 3W
5: 5W
StyleType
Nil: Power
P: Precision
S: Small
X: Power
Termination
Material
C: SnCu C: ±0.25%
T52 103
Taping and
Forming
Axial: T26, T52,
T521, T631
Stand-off Axial:
L52A, L52B
Radial: VTP, GT
L forming
A F
Packaging
A: Ammo
R: Reel
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
Tolerance
D: ±0.5%
F: ±1%
G: ±2%
J: ±5%
K: ±10%
127
resistors
% Rated Power
100
80
60
40
20
-40 0 4080120280
Ambient Temperature
(°C)
0
70
160
275
200240
155
CW
% Rated Power
100
80
60
40
20
-40 0 4080120280
Ambient Temperature
(°C)
0
25
160
275
200240
155
CWP
Temperature Rise (°C)
300
250
200
150
0255075
% Rated Power
0
100
50
CW1/4
100
CW1/2
CW1, CW1P
CW2, CW2P
CW3, CW3P
CW5
applications and ratings
CW,CWP
coat insulated, precision coat insulated
miniature wirewound leaded resistors
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
T.C.R.
(ppm/°C)
Max.
E-24, E-96
(C±0.25%)
E-24, E-96
(D±0.5%)
±250 ———
±500 ———
±250 ———
±90:
R≥10Ω*
±50: R<10Ω
1 - 100
1 - 390
1 - 390
0.47 - 220
0.47 - 390
0.47 - 390
* T.C.R. = 20ppm/°C available on request
environmental applications
Derating Curve
Resistance Range (Ω)
E-24, E-96
(F±1%)
E-24
(G±2%)
—
0.1 - 390
0.1 - 390
0.1 - 390
0.1 - 390
—
—
0.1 - 430
0.1 - 390
— +25°C
0.1 - 390
E-24
(J±5%)
0.47 - 15
0.1 - 100
E-24
(K±10%)
0.47 - 15
0.1 - 100
Ambient
Temperature
0.1 - 390
0.1 - 390
0.1 - 390
—
0.1 - 390
0.01 - 0.091
0.01 - 0.091
0.01 - 0.091
0.1 - 100
—
0.01 - 0.091
0.01 - 0.091
0.01 - 0.091
0.1 - 100
—
Surface Temperature Rise
Rated
+70°C
Operating
Temperature
Range
-40°C
to
+155°C
Performance Characteristics
Parameter
Resistance
T.C.R.
Overload (Short Time)
Resistance to Solder Heat
Moisture Resistance
Endurance @ 70°C
Resistance to Solvent
128
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 12/01/08
KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax:814-362-8883 • www.koaspeer.com
Requirement ∆ R ±(% + 0.05Ω)
Limit Typical Test Method
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
—
—
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)
—
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)
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