CWH
coat insulated miniature wirewound resistors
EU
features
•
•
•
•
•
•
•
Resistors meeting MIL-PRF-26 (U characteristics)
High precision resistors with T.C.R. less than ±50x10
-6
/K
Flame retardant coating (Equivalent to UL94 V-0)
Automatic insertion is applicable
Various types of formings are available
Excellent in pulse characteristic
Marking: Black body color
Precision: Alpha-numeric 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
CW1H
CW2H
CW3H
Marking
Resistive Electrode
Wire
Cap
Lead
Wire
L
.374±.039
(9.5±1.0)
.472±.039
(12.0±1.0)
.591±.039
(15.0±1.0)
.118
(3.0)
Dimensions
inches
(mm)
t (max.)
D
d (nom.)
.138±.039
(3.5±1.0)
.157±.039
(4.0±1.0)
.236±.039
(6.0±1.0)
.031
(0.8)
1.18±.118
(30.0±3.0)
l
Insulation Coating
ordering information
New Part #
CW
Type
3
Power
Rating
1: 1W
2: 2W
3: 3W
H
Style
H: Stability
C
Termination
Material
C: SnCu
T521
Taping and
Forming
Axial: T52,
T521, T631
Radial: VTP, GT
L forming:
L12.5A, L15A,
L20A, L25A
A
Packaging
A: Ammo
R: Reel
10R0
Nominal
Resistance
3 significant figures
+ 1 multiplier
“R” indicates decimal
on values <100Ω
F
Tolerance
D: ±0.5%
F: ±1%
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.
3/04/08
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
129
resistors
CWH
resistors
coat insulated miniature wirewound resistors
applications and ratings
Part
Designation
CW1PC
CW2PC
CW3PC
Power
Rating
1W
2W
3W
±20: R≥10Ω
±50: R<10Ω
T.C.R.
(ppm/°C)
Max.
Resistance Range (Ω)
E-24, E-96
(D±0.5%)
0.47 - 220
0.47 - 750
0.47 - 1k
E-24, E-96
(F±1%)
0.1 - 430
0.1 - 2k
0.1 - 3k
+25°C
Rated
Ambient
Temperature
Operating
Temperature
Range
-55°C
to
+275°C
environmental applications
Derating Curve
100
% Rated Power
80
60
40
20
0
-40
0
25
40
160 200
155
Ambient Temperature
(°C)
80
120
240
280
275
Performance Characteristics
Parameter
Resistance
T.C.R.
Overload (Short Time)
Resistance to Solder Heat
Endurance @ 70°C
Low Temperature
High Temperature
Requirement
∆
R ±(% + 0.05Ω)
Limit
Typical
—
—
±0.15
±0.15
±0.45
±0.15
±0.45
25°C
Test Method
Within specified tolerance
Within specified T.C.R.
±0.2
±0.2
±0.5
±0.2
±0.5
+25°C/-55°C and +25°C/+125°C
Power rating x 5 for 5 seconds
350°C ± 10°C for 3.5 seconds or 260°C ± 5°C
for 10 seconds
25°C, 2000 hours
1.5 hr ON, 0.5 hr OFF cycle
-65°C, 24 hours
+275°C, 250 hours
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
3/03/08
130
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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