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CHARACTERISTICS
Ceramic Core
CeramTec Rubalit® 96% alumina
End Caps
Stainless steel, precision formed
Leads
Copper wire, 100% Sn (Lead Free) coated
Resistance Wire
CN49W alloy TC ±20ppm/°C
Encapsulation
SUMICON 1100/1200 Epoxy molding compound for IC encapsulation
Standard Tolerance
F (1.0%), J (5.0%)
Temperature Coefficient
±300ppm/°C for ≤0.03Ω; ±100ppm/°C for ≥0.033Ω
Maximum Working Voltage
√PxR
WL Series
Miniature Wirewound
Current Sense
Type Power Rating (watts) Resistance Range (Ω)
WLA 0.5 0.005-0.100
WLB 1 0.005-0.100
WLC 2 0.010-0.100
Test Conditions Of Test Performance
Thermal Shock
Rated power applied until thermal stability, -55°C +0°C,-5°C,15min. ±2.0%
Short-time Overload
5 times rated wattage for 5 seconds ±2.0%
Solderability
Method 208 of MIL-STD-202 ±2.0%
Terminal Strength
Pull test:10 pounds, 5 to10 seconds, Twist test: 1080°, 5 second/rotation ±1.0%
Dielectric Withstanding Voltage
500 Volts rms for 1W. 1 minute ±1.0%
High Temperature Exposure
Exposed to an ambient temperature of 275 +5/-0°C for 250 ±8 hours, ±5.0%
Moisture Resistance
MIL-STD-202 Method 106, 7b not applicable ±2.0%
Low Temperature Storage
Cold chamber at a temperature of -65 ±2°C for 24 ±4 hours ±2.0%
Vibration, High Frequency
Frequency varied 10 to 2000Hz, 200G peak, 2 directions 6 hours each ±1.0%
Load Life
1000/2000 hours at rated power, +25°C, 1.5 hours “On”, 0.5 hours “Off” ±5.0%
100
Percent Rated Power
Ambient Temperature, ϒC
60
20
0
80
40
25 50 100 175750 125 150
FEATURES
•Ultra-lowohmicvalueseriesforCurrentSensing
applications
•Verylowinductance(<1nHat1MHzTest)
•Miniaturizeddimensions,Betterpowertodimen-
sionratios
•Useofthehighestqualitystandard(96%Alumina)
ceramiccore
•Manufacturingprocess–Wirewinding/Spot
Welding–byComputerNumericalControl(CNC)
machinetoolstoensureconsistencyofproduct
quality.
•Encapsulatedbyepoxymoldingcompound
•AdvancedICencapsulationmold/dietechnologies
Derating
PERFORMANCE DATA
SERIES SPECIFICATIONS
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