For further information
on packaging, please
refer to Appendix C.
CW,CWP
coat insulated, precision coat insulated
miniature wirewound leaded resistors
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
Axial: T26, T52,
T521, T631
Stand-off Axial:
L52A, L52B
Radial: VTP, GT
L forming
ordering information
±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
1/4: 0.25W
1/2: 0.5W
1: 1W
2: 2W
3: 3W
5: 5W
Nil: Power
P: Precision
S: Small
X: Power
C: SnCu C: ±0.25%
D: ±0.5%
F: ±1%
G: ±2%
J: ±5%
K: ±10%
CW 1/2 P C
StyleType Power
Rating
Nominal Resistance Tolerance
Termination
Material
Taping and
Forming
New Part # T52 103
A: Ammo
R: Reel
Packaging
A F
dimensions and construction
d
D
Marking
Insulation Coating
End
Cap Lead
Wire
L l
t t
Ceramic Core
Resistive
Wire
L
CW1/4 .13±.012
(3.3±0.3)
.02
(0.5)
.075±.012
(1.9±0.3)
.018
(0.45)
.024
(0.6)
.031
(0.8)
1.18±.118
(30.0±3.0)
1.50±.118
(38.0±3.0)
.098±.039
(2.5±1.0)
.138±.039
(3.5±1.0)
.157±.039
(4.0±1.0)
.236±.039
(6.0±1.0)
.354±.039
(9.0±1.5)
.039
(1.0)
.118
(3.0)
.256±.039
(6.5±1.0)
.945±.059
(24.0±1.5)
CW1/2
CW1
CW2
CW3
CW5
Type t (max.) D d (nom.) l
Dimensions inches (mm)
PMS 300 neg. Black neg.
.138+.039
-0
(3.5+1.5)
-0
.374±.039
(9.5±1.0)
CW1X
.138±.039
(3.5±1.0)
CW1P
.157+.039
-0
(4.0+1.5)
-0
.472±.039
(12.0±1.0)
CW2X
.157±.039
(4.0±1.0)
CW2P
.236+.039
-0
(6.0+1.5)
-0
.591±.039
(15.0±1.0)
CW3X
.236±.039
(6.0±1.0)
CW3P
1.18±.118
(30.0±3.0)
.098±.039
(2.5±1.0)
.256±.039
(6.5±1.0)
CW1S .039
(1.0)
.024
(0.6)
EU
127
KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
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
resistors
1733 Reader's Spreads pg1-203:document 1/27/09 4:10 PM Page 125
128 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
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
resistors
CW,CWP
coat insulated, precision coat insulated
miniature wirewound leaded resistors
Part
Designation
Rated
Ambient
Temperature
Power
Rating
applications and ratings
T.C.R.
(ppm/°C)
Max.
CW1/4
CW1/2
CW1
CW1P
CW2
CW2P
CW3
CW3P
CW5
0.25W
0.5W
1.0W
2.0W
3.0W
1.0W
2.0W
3.0W
5.0W
±250 ———
—
— +25°C
+70°C
±90:
R≥10Ω*
±50: R<10Ω
Operating
Temperature
Range
-40°C
to
+155°C
1 - 100
1 - 390
1 - 390
0.47 - 220
0.47 - 390
0.47 - 390
0.1 - 430
0.1 - 390
0.47 - 15
0.1 - 100
0.1 - 390
0.1 - 390
0.1 - 390
—
0.1 - 390
0.1 - 390
0.1 - 390
0.1 - 390
0.1 - 390
0.1 - 390
E-24, E-96
(C±0.25%)
E-24, E-96
(D±0.5%)
E-24, E-96
(F±1%)
E-24
(G±2%)
E-24
(J±5%)
Resistance Range (Ω)
Derating Curve
environmental applications
% 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
Surface Temperature Rise
Temperature Rise (°C)
300
250
200
150
0255075
% Rated Power
0100
50
CW1/4
100 CW1/2
CW1, CW1P
CW2, CW2P
CW3, CW3P
CW5
Resistance
T.C.R.
25°C
CW: Room temperature/100°C up
CWP: +25°C/-40°C and +25°C/+155°C
Within regulated tolerance
—
—
±250ppm/°C: CW
±90, 20ppm/°C: CWP, R≥10
±50ppm/°C: CWP, R<10
Performance Characteristics
Parameter
Requirement ∆R ±(% + 0.05Ω)
Limit Typical Test Method
Overload (Short Time)
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*
1: CW,CWX 0.5: CWP
2: CW1S
0.2: CWP(R<10Ω)*
0.8: CW,CWX 0.4: CWP
1.8: CW1S
0.18:CWP(R<10Ω)
Resistance to Solder Heat 350°C ± 10°C for 3.5 seconds or 260°C ± 5°C
for 10 seconds
1: CW, CW1S, CWX
0.5: CWP
0.2: CWP (R<10Ω)*
0.8: CW, CW1S, CWX
0.4: CWP
0.18: CWP (R<10Ω)
Moisture Resistance Power rating x 1/10, 40°C, 90 - 95% RH, 1000 hours,
1.5 hr ON, 0.5 hr OFF cycle
5: CW, CW1S, CWX
2: CWP
0.5: CWP (R<10Ω)*
4: CW, CW1S, CWX
1.6: CWP
0.45: CWP (R<10Ω)
Endurance @ 70°C
70°C, 1000 hours (CW, CWX, CW1S),
25°C, 1000 hours (CWP)
1.5 hr ON, 0.5 hr OFF cycle
5: CW, CW1S, CWX
2: CWP
0.5: CWP (R<10Ω)*
4: CW, CW1S, CWX
1.6: CWP
0.45: CWP (R<10Ω)
Resistance to Solvent After immersing the sample in IPA for 3 min., the resistor
surface should be wiped with a dry cloth (velvet or gauze)
No evidence of damage to
protective coating and marking
—
* T.C.R. = 20ppm/°C available on request
0.47 - 15
0.1 - 100
—
—
E-24
(K±10%)
CW1X
CW2X
CW3X
CW1S
1.0W
2.0W
3.0W
1.0W
±500 ————
—
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
±250 ———
1733 Reader's Spreads pg1-203:document 1/27/09 4:11 PM Page 126
