Model CWS
Wirewound Resistors
Commercial Power, Surface Mount
Features
Direct mounting on printed circuit board
Fireproof inorganic construction
High wattage capabilities, low board temperatures
Suitable for pick and place environment
Meets or exceeds EIA-RS-344 requirement
Consult factory for special applications
Special inorganic potting compound provides high thermal condcutivity and humidity resistance
Standard Electrical Specifications
Model Power @ + 25 °C (watts) Resistance Range
CWS-3 3 .1 - 600
CWS-5 5 .1 - 700
Electrical Specifications
Power Rating: 3 and 5 watt
Resistance Tolerance: ± 5%, ±10%
Temperature Coefficient:
Below 1 ohm, 0 ± 600PPM/°C maximum.
1 ohm and above, 0 ± 300PPM/°C maximum.
Dimensional Configuration Maximum Working Voltage:

Model A
±.040 [1.02]
B
±.040 [1.02]
C
±.060 [1.52]
E
±..012 [.305]
CWS-3 .906
[23.01]
.374
[9.50]
.450
[11.43]
.287
[7.29]
CWS-5 1.06
[26.92]
.374
[9.50]
.590
[14.99]
.287
[7.29]
Operating Temperature: - 55 °C to + 275 °C
Material Specifications
Construction: Resistance wire is a high quality, premium grade wound onto a woven core. Tin plated terminals are crimped to wouind core. The assembly is then potted into a high quality steatite ceramic case using high temperature, high thermal conducting inorganic potting compound. This results in a completely fireproof inorganic package.
Derating

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