CW
,
CWP
,
CWH
coat-insulated, precision coat-insulated
and miniature wirewound leaded resistors
EU
features
•
Flameproof silicone coating
equivalent (UL94V0)
•
CWH resistors meet MIL-PRF-26 (U characteristics)
•
CWH high precision resistors with T.C.R. less than ±20x10
-6
/K
•
Suitable for automatic machine insertion
•
Various types of formings are available
•
Excellent in pulse characteristic
•
Products with lead-free terminations meet EU RoHS
and China RoHS requirements
•
CW1SS has UL1412 approval (File No. E320246)
•
Surface mount style “N” forming is suitable for automatic
mounting CW, CWP
leaded
resistors
dimensions and construction
Type
t
D
L
Ceramic Core
l
t
d
CW1/4
CW1/2
CW1
CW1X
Marking
Resistive
Wire
End
Cap
Lead
Wire
CW1P
CW2
CW2X
CW2P
CW3
CW3X
CW3P
CW5
CW1S
CW1SS
CW1H
CW2H
CW3H
.945±.006
(24.0±1.5)
.256±.039
(6.5±1.0)
.354±.039
(9.0±1.0)
.472±.039
(12.0±1.0)
.591±.039
(15.0±1.0)
.591±.039
(15.0±1.0)
.472±.039
(12.0±1.0)
.354±.039
(9.0±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
-0
(3.5
+1.5
)
-0
+.006
l*
.018
(0.45)
.024
(0.6)
Insulation Coating
.138±.039
(3.5±1.0)
.157±.039
(4.0±1.0)
.118
(3.0)
.157
+.006
-0
(4.0
+1.5
)
-0
.157±.039
(4.0±1.0)
.236±.039
(6.0±1.0)
.236
+.006
-0
(6.0
+1.5
)
-0
.236±.039
(6.0±1.0)
.354±.006
(9.0±1.5)
.039
(1.0)
.098±.039
(2.5±1.0)
.138±.039
(3.5±1.0)
.118
(3.0)
.157±.039
(4.0±1.0)
.236±.039
(6.0±1.0)
.031
(0.8)
1.18±.118
(30.0±3.0)
.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)
* Lead length changes depending on taping and forming type.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
10/28/21
178
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
CW
,
CWP
,
CWH
coat-insulated, precision coat-insulated
and miniature wirewound leaded resistors
ordering information
CW
Type
1/2
Power
Rating
1/4: 0.25W
1/2: 0.5W
1: 1W
2: 2W
3: 3W
5: 5W
P
Style
H: Stability
Nil: Power
P: Precision
S: Small
X: Power
SS: Small type,
UL Approved
C
Termination
Material
C: SnCu
T52
Taping and
Forming
Axial: T26, T52,
T521, T631
Stand-off Axial:
L52A, L52B
Radial: VTP*, GT
L forming: L12.5A,
L15A, L20A, L25A
N forming: N17, N20
* VTP: Applicable to 0.47Ω or
over for CW1, CW1P only
A
Packaging
A: Ammo
R: Reel
TEB: TEG:
Embossed
plastic
(N forming)
Nil: Box
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%
leaded
resistors
For further information on packaging, please refer to Appendix C.
Contact us when you have control request for environmental hazardous
material other than the substance specified by the EU RoHS
applications and ratings
Part
Designation
CW1/4
CW1/2
CW1
CW2
CW3
CW5
CW1X
CW2X
CW3X
CW1S
CW1SS
CW1P
CW2P
CW3P
CW1H
CW2H
CW3H
Power
Rating
0.25W
0.5W
1.0W
2.0W
3.0W
5.0W
1.0W
2.0W
3.0W
1.0W
1.0W
1.0W
2.0W
3.0W
1.0W
2.0W
3.0W
±20: R≥10Ω
±50: R<10Ω
—
±250
±100
±90: R≥10Ω
±50: R<10Ω
—
—
1 - 100
1 - 390
1 - 390
—
—
0.47 - 220
0.47 - 390
0.47 - 390
0.47 - 220
0.47 - 750
0.47 - 1k
—
—
0.1 - 430
0.1 - 390
0.1 - 390
0.1 - 430
0.1 - 2k
0.1 - 3k
—
—
—
+25°C
-55°C
to
+275°C
—
—
—
+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
10
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
CW_H: Max. Working Voltage: E=
√(PxR)
CW_H: Max. Overload Voltage: E=
√(PxRx5)
environmental applications
Derating Curve
CW, CW X, CW1S, CWSS
100
% Rated Power
80
60
40
20
0
-40
0
40
120
160 200
80
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
CW P
100
% Rated Power
80
60
40
20
0
-100
-50
-55
0
CW H
150
200
50
100
25
Ambient Temperature
(°C)
250
300
275
For resistors operated at an ambient temperature of 25°C or above, a power rating shall be derated in accordance with the above derating curve.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
6/15/20
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
179
CW
,
CWP
,
CWH
coat-insulated, precision coat-insulated
and miniature wirewound leaded resistors
environmental applications
Surface Temperature Rise
Measuring Point
Temperature Rise (°C)
300
5W
3W
200
2W
1S, 1SS
1W
1/2W
1/4W
leaded
resistors
100
0
0
50
100
% Rated Power
Fixing board: t=1.2
Material: Glass epoxy board
Performance Characteristics
Parameter
Resistance
T.C.R.
Requirement
∆
R ±(% + 0.05Ω)
Limit
Typical
Within specified tolerance
Within specified T.C.R.
1%: CW, CWX; 0.5%:
CWoP; 2%: CW1S, CW1SS
0.2%: CWoP(R<10Ω)*,
CWoH
1%: CW, CW1S, CW1SS,
CWoX; 0.5%: CWoP;
0.2%: CWoP (R<10Ω)*,
CWoH
5%: CW, CW1S, CWoX
2%: CWoP
0.5%: CWoP (R<10Ω)*
5%: CW, CW1S, CW1SS,
CWoX; 2%: CWoP
0.5%: CWoP (R<10Ω)*
No abnormality in appearance
such as disappearance of
markings, etc.
0.2%: CWoH
Test Method
25°C
CW: +25°C/+125°C
CW
o
P: +25°C/-40°C and +25°C/+155°C
CW
o
H: +25°C/-55°C and +25°C/+125°C
—
—
0.8%: CW, CWoX; 0.4: CWoP
1.8%: CW1S, CW1SS
0.18%:CWoP(R<10Ω)
0.15%: CWoH
0.8%: CW, CW1S, CW1SS,
CWoX; 0.4%: CWoP;
0.18%: CWoP (R<10Ω);
0.15%: CWoH
4%: CW, CW1S, CWoX
1.6%: CWoP
0.45%: CWoP (R<10Ω)
4%: CW, CW1S, CW1SS,
CWoX; 1.6%: CWoP
0.45%: CWoP (R<10Ω)
Overload (Short Time)
CW,CW
o
X,CW1S,CW1SS: Power rating x 10 for 5 seconds
CW
o
P: Power rating x 6.25 for 5 seconds
CW
o
P (R<10Ω), CW
o
H: Power rating x 5 for 5 seconds
350°C ± 10°C, 3 seconds ± 0.5 second
260°C ± 5°C, 10 seconds ± 1 second
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, CW
o
X, CW1S, CW1SS),
25°C, 1000 hours (CW
o
P)
1.5 hr ON, 0.5 hr OFF cycle
Resistance to Solder Heat
Moisture Resistance
Endurance @ 70°C
Resistance to Solvent
—
0.15%: CWoH
After immersing the sample in IPA for 3 min., the resistor
surface should be lightly wiped with a dry cloth (velvet or gauze)
-65°C, 24 hours
Low Temperature
High Temperature
0.5%: CWoH
0.45%: CWoH
+275°C, 250 hours
Thunder Surge
3%: CW1SS
—
Combination wave, +1.5kV 20 seconds 3 cycles
Load Life
* Refer to MIL-PRF-26G standard
0.5%: CWoH
0.45%: CWoH
-25°C, power rating, 1.5 hr ON, 0.5 hr OFF 2000 hours
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
10/28/20
180
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
