C&H Technology CPR-High-Volume - Manual (Page 3)

www.vishay.com For technical questions, contact: [email protected] Document Number: 30261
50 Revision: 14-Nov-08
CPR High Volume
Vishay Dale Wirewound/Metal Oxide Resistors, Commercial Power,
Radial Terminals
MATERIAL SPECIFICATIONS
Element:
Wirewound = Copper-nickel alloy or nickel-chrome alloy,
depending on resistance value
Metal Oxide = High temperature fired Metal Oxide film
Core: Ceramic
Body: Steatite ceramic case with cement potting compound
Terminals: Tin plated steel
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
Wirewound
Metal Oxide
PERFORMANCE
TEST CONDITIONS OF TEST TEST LIMITS
Thermal Shock - 55 °C to + 275 °C (+ 225 °C for Metal Oxide), 5 cycles, 30 min dwell time ± (5.0 % + 0.05
Ω) ΔR
Short Time Overload 5 x rated power for 5 s ± (4.0 % + 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, + 25 °C, 1.5 h “ON”, 0.5 h “OFF” ± (10.0 % + 0.05
Ω) ΔR
Terminal Strength 5 pounds for 30 s; body twisted about axis, 3 x 360° rotations ± (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 ± (4.0 % + 0.05 Ω) ΔR