CW Datasheet, PDF (1/2 Pages) Welwyn Components Limited – Tubular Cement Coated Wirewound Resistors

Tubular Cement Coated
Wirewound Resistors
CW Series
• Forced air cooling to 90 watts
• All welded construction
• Flameproof protection
• Suitable for automotive application
• Weldable terminations
Welwyn Components
Electrical Data
Power rating at 25°C
Resistance range
Limiting element voltage
TCR 20° - 70°C
Resistance tolerance (Code)
Standard values
Thermal impedance
Ambient temperature range
watts
ohms
volts
ppm/°C
%
°C/watt
°C
Physical Data
Dimensions (mm)
Type L
D
T
d
A
B
E
F
±0.75 max. ±0.15
max. max. nom. min.
CW10 34.25 12.00 5.00 6.35 9.00 16.50 0.361 6
±0.2
CW20 41.75 22.50 5.00 13.00 14.00 22.00 0.361 5
±0.35
CW10
CW20
10
20
0.35 to 6K
0.3 to 18K
250
600
150
5 (J), 10 (K)
E24
23
11
-55 to +280
Notes
Other values available
T
F
L
E
B
A
d
D
Construction
Precision stainless steel collars are welded onto a high purity
ceramic tube. The wire element is wound onto the ceramic
tube using controlled tension for optimum performance.
Electrical connections are welded to ensure good electrical
stability and high reliability. The resistors are coated with
flameproof cement which provides electrical, mechanical and
climatic protection. Finally all components are legend marked
with indelible ink.
Terminations
Material The terminations are produced from top quality
stainless steel for maximum corrosion resistance.
Marking
All components are legend marked with type reference,
resistance value and tolerance. Special custom marking is
available by negotiation.
Solvent Resistance
The marking and protection will withstand all commonly used
industrial cleaning fluids suitable for electronic components.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
Telephone: [phone] · Facsimile: [phone] · Email: [e-mail] · Website: www.welwyn-tt.com
A subsidiary of
TT electronics plc
Issue C · 04.03
119