199
KOA Speer Electronics, Inc. • Bolivar Drive • P.O. Box 547 • 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.
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 (UL94V-0)
•Suitable for automatic machine insertion
•Marking: Blue-gray body color with color-coded bands
Precision: Color-coded bands and alpha-numeric
black marking
Axial: T26, T52,
T521, T631
Stand-off Axial:
L52A, L52B
Radial: VTP, GT
L forming
ordering information
CW1/2
±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
L: SnPb
C: SnCu
C: ±0.25%
D: ±0.5%
F: ±1%
G: ±2%
J: ±5%
CW 1/2
J
P L
Type Tolerance
T52
Packaging
StyleType Power
Rating
Nominal Resistance Tolerance
Nominal
Resistance
Termination
Material
Taping and
Forming
Old Part #
New Part #
103
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)
.374±.039
(9.5±1.0)
.472±.039
(12.0±1.0)
.591±.039
(15.0±1.0)
.945±.059
(24.0±1.5)
CW1/2
CW1
CW1P
CW2
CW2P
CW3
CW3P
CW5
Type t (max.) D d (nom.) l
Dimensions inches (mm)
leaded
resistors
200 KOA Speer Electronics, Inc. • Bolivar Drive • P.O. Box 547 • 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.
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>Ω
Operating
Temperature
Range
-40°C
to
+155°C
1Ω- 100Ω
1Ω- 430Ω
1Ω- 620Ω
0.47Ω- 220Ω
0.47Ω- 780Ω
0.47Ω- 1kΩ
0.1Ω- 430Ω
0.1Ω- 430Ω
0.47Ω- 15Ω
0.1Ω- 100Ω
0.1Ω- 2kΩ
0.1Ω- 3kΩ
0.1Ω- 4.7kΩ
—
0.1Ω- 430Ω
0.1Ω- 2kΩ
0.1Ω- 3kΩ
0.1Ω- 4.7kΩ
0.1Ω- 2kΩ
0.1Ω- 3kΩ
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
Derating Curve
environmental applications
% Rated Power
100
80
60
40
20
-40 0 40 80 120 280
Ambient Temperature
(°C)
0
70
160
275
200 240
155
CW
% Rated Power
100
80
60
40
20
-40 0 40 80 120 280
Ambient Temperature
(°C)
0
25
160
275
200 240
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 CW: Power rating x 10 for 5 seconds
CWP: Power rating x 6.25 for 5 seconds
1: CW
0.5: CWP
0.8: CW
0.4: CWP
Resistance to Solder Heat 350°C ± 10°C for 3.5 seconds or 260°C ± 5°C
for 10 seconds
1: CW
0.5: CWP
0.8: CW
0.4: CWP
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
2: CWP
4: CW
1.6: CWP
Endurance @ 70°C 70°C, 1000 hours (CW), 25°C, 1000 hours (CWP)
1.5 hr ON, 0.5 hr OFF cycle
5: CW
2: CWP
4: CW
1.6: CWP
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
leaded
resistors
