Owner manual

www.vishay.com For technical questions, contact: [e-mail] Document Number: 30257
3 Revision: 12-Dec-07
CPR Special Terminals
Vishay Dale
Wirewound Resistors, Commercial Power,
Radial Terminals
MATERIAL SPECIFICATIONS
Element: Copper-nickel alloy or nickel-chrome alloy,
depending on resistance value
Core: Woven fiberglass
Body: Steatite ceramic case with inorganic potting
compound
Terminals: Tin plated CRS
Part Marking: DALE, model, wattage, value, tolerance,
date code
RATED POWER IN %
AMBIENT TEMPERATURE IN °C
0
20
40
60
80
100
120
- 55 75 275- 25 175
Derating
225
125
25
40
PERFORMANCE
TEST CONDITIONS OF TEST TEST LIMITS
Thermal Shock - 25 °C to + 155 °C, 5 cycles, 30 min dwell time ± (1.0 % + 0.05 Ω) ΔR
Short Time Overload 10 x rated power for 5 s ± (2.0 % + 0.05 Ω) ΔR
Dielectric Withstanding Voltage 1000 V
rms
for 1 min ± (2.0 % + 0.05 Ω) ΔR
Low Temperature Operation - 65 °C, full rated working voltage for 45 min ± (3.0 % + 0.05 Ω) ΔR
Humidity 75 °C, 90 % - 100 % RH, 240 h ± (5.0 % + 0.05 Ω) ΔR
Load Life 1000 h at rated power, + 40 °C, 1.5 h “ON”, 0.5 h “OFF” ± (5.0 % + 0.05 Ω) ΔR
Terminal Strength 10 pounds in axial direction for 30 s ± (2.0 % + 0.05 Ω) ΔR
Resistance to Solder Heat Terminal immersed 3.5 s in molten solder at 1/8" to 3/16" from body ± (1.0 % + 0.05 Ω) ΔR