Features
WL series
Ultra-low ohmic value series for Current Sensing
applications
Miniature Wirewound
Ver y low inductance (<1nH at 1MHz Test)
Current Sense
Miniaturized dimensions, Better power to dimen-
sion ratios
Use of the highest quality standard (96% Alumina)
ceramic core
Manufacturing processWire winding/Spot
Weldingby Computer Numerical Control (CNC)
machine tools to ensure consistency of product
quality.
Encapsulated by epoxy molding compound
Advanced IC encapsulation mold/die technologies
series sPeciFicatiONs
Type Power Rating (watts) Resistance Range ()
WLA 0.5 0.005-0.100
WLB 1 0.005-0.100
WLC 2 0.010-0.100
characteristics
Ceramic Core CeramTec Rubalit 96% alumina Derating
End Caps Stainless steel, precision formed 100
Copper wire, 100% Sn (Lead Free) coated
Leads
80
Resistance Wire CN49W alloy TC 20ppm/C
60
Encapsulation SUMICON 1100/1200 Epoxy molding compound for IC encapsulation
40
Standard Tolerance F (1.0%), J (5.0%)
20
Temperature Coefficient 300ppm/C for 0.03; 100ppm/C for 0.033
0
0 25 50 75 100 125 150 175
PxR
Maximum Working Voltage
Ambient Temperature, C
PerFOrMaNce Data
Test Conditions Of Test Performance
Rated power applied until thermal stability, -55C +0C,-5C,15min. 2.0%
Thermal Shock
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%
Exposed to an ambient temperature of 275 +5/-0C for 250 8 hours, 5.0%
High Temperature Exposure
Moisture Resistance MIL-STD-202 Method 106, 7b not applicable 2.0%
Low Temperature Storage Cold chamber at a temperature of -65 2C 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, +25C, 1.5 hours On, 0.5 hours Off 5.0%
(continued)
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Percent Rated PowerWL series
Miniature Wirewound
Current Sense
DiMeNsiONs
(in./mm)
Type Power Rating (watts) L D d
0.984 / 25 LD
d
WLA 0.5 5.08 / 0.200 2.54 / 0.100 0.60 / 0.024
WLB 1 7.00 / 0.276 3.30 / 0.130 0.60 / 0.024
WLC 2 11.4 / 0.450 4.57 / 0.180 0.80 / 0.031
OrDeriNg iNFOrMatiON
Standard Part Numbers for WL Series
RoHS compliant
Wattage: 0.5 1.0 2.0
Series: WLA WLB WLC
Ohms
Series Ohms
Power Tolerance Package
0.005 WLAR005FE WLBR005FE
A = 0.5 F = 1% T = Tape
0.01 WLAR010FE WLBR010FE WLCR010FE
B = 1 J = 5% blank = 25pc Pack
0.015 WLAR015FE WLBR015FE WLCR015FE
C = 2
0.02 WLAR020FE WLBR020FE WLCR020FE
0.025 WLAR025FE WLBR025FE WLCR025FE
0.03 WLAR030FE WLBR030FE WLCR030FE
0.05 WLAR050FE WLBR050FE WLCR050FE
0.10 WLAR100FE WLBR100FE WLCR100FE
Key to five-band code 15234
Band 1 2 3 4 5
Color Digit Multiplier Tolerance
Black 0 0 0 x 1
Brown 1 1 1 x 10 1% (F)
Red 2 2 2 x 100 2% (G)
Orange 3 3 3 x 1K
Yellow 4 4 4 x 10K
Green 5 5 5 x 100K 0.5% (D)
Blue 6 6 6 x 1M 0.25% (C)
Violet 7 7 7 x 10M 0.10% (B)
Grey 8 8 8 0.05%
White 9 9 9 x 0.001
Gold x 0.1 5% (J)
Silver x 0.01 10% (K)
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