For further information
on packaging, please
refer to Appendix C.
CWH
coat insulated miniature wirewound resistors
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
Axial: T52,
T521, T631
Radial: VTP, GT
L forming:
L12.5A, L15A,
L20A, L25A
ordering information
3 significant figures
+ 1 multiplier
“R” indicates decimal
on values <100Ω
1: 1W
2: 2W
3: 3W
H: Stability C: SnCu D: ±0.5%
F: ±1%
CW 3 H C
StyleType Power
Rating
Nominal
Resistance Tolerance
Termination
Material
Taping and
Forming
New Part # T521 10R0
A: Ammo
R: Reel
Packaging
A F
dimensions and construction
d
D
Marking
Insulation Coating
Electrode
Cap Lead
Wire
L l
t t
Ceramic Core
Resistive
Wire
L
CW1H .374±.039
(9.5±1.0)
.138±.039
(3.5±1.0)
.031
(0.8)
1.18±.118
(30.0±3.0)
.157±.039
(4.0±1.0)
.236±.039
(6.0±1.0)
.118
(3.0)
.472±.039
(12.0±1.0)
CW2H
CW3H
Type t (max.) D d (nom.) l
Dimensions inches (mm)
.591±.039
(15.0±1.0)
EU
145
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. 3/04/08
resistors
146 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. 3/03/08
CWH
coat insulated miniature wirewound resistors
Part
Designation
Rated
Ambient
Temperature
Power
Rating
applications and ratings
T.C.R.
(ppm/°C)
Max.
CW1PC
CW2PC
CW3PC
1W
2W
3W
+25°C
±20: R≥10Ω
±50: R<10Ω
Operating
Temperature
Range
-55°C
to
+275°C
0.1 - 430
0.1 - 2k
0.1 - 3k
0.47 - 220
0.47 - 750
0.47 - 1k
E-24, E-96
(D±0.5%)
E-24, E-96
(F±1%)
Resistance Range (Ω)
Derating Curve
environmental applications
% Rated Power
100
80
60
40
20
-40 0 4080120280
Ambient Temperature
(°C)
0
25
160
275
200240
155
Resistance
T.C.R.
25°C
+25°C/-55°C and +25°C/+125°C
Within specified tolerance
—
—
Within specified T.C.R.
Performance Characteristics
Parameter
Requirement ∆R ±(% + 0.05Ω)
Limit Typical Test Method
Overload (Short Time) Power rating x 5 for 5 seconds±0.2 ±0.15
Resistance to Solder Heat 350°C ± 10°C for 3.5 seconds or 260°C ± 5°C
for 10 seconds
±0.2 ±0.15
Endurance @ 70°C 25°C, 2000 hours
1.5 hr ON, 0.5 hr OFF cycle
±0.5 ±0.45
Low Temperature -65°C, 24 hours±0.2 ±0.15
High Temperature +275°C, 250 hours±0.5 ±0.45
resistors
