RES-WL Datasheet, PDF (1/2 Pages) Ohmite Mfg. Co. – Very low inductance

WL Series
Miniature Wirewound
Current Sense
F e at u r e s
• Ultra-low ohmic value series for Current Sensing
applications
• Very low inductance (<1nH at 1MHz Test)
• Miniaturized dimensions, Better power to dimen-
sion ratios
• Use of the highest quality standard (96% Alumina)
ceramic core
• Manufacturing process–Wire winding/Spot
Welding–by Computer Numerical Control (CNC)
machine tools to ensure consistency of product
quality.
• Encapsulated by epoxy molding compound
• Advanced IC encapsulation mold/die technologies
SERIES S P ECI F ICATI O N S
Type
WLA
WLB
WLC
Power Rating (watts)
0.5
1
2
Resistance Range (Ω)
0.005-0.100
0.005-0.100
0.010-0.100
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
Derating
100
80
60
40
20
0
0 25 50 75 100 125 150 175
Ambient Temperature, ϒC
P ER F O R M A N CE D ATA
Test Conditions Of Test
Thermal Shock Rated power applied until thermal stability, -55°C +0°C,-5°C,15min.
Short-time Overload 5 times rated wattage for 5 seconds
Solderability Method 208 of MIL-STD-202
Terminal Strength Pull test:10 pounds, 5 to10 seconds, Twist test: 1080°, 5 second/rotation
Dielectric Withstanding Voltage 500 Volts rms for 1W. 1 minute
High Temperature Exposure Exposed to an ambient temperature of 275 +5/-0°C for 250 ±8 hours,
Moisture Resistance MIL-STD-202 Method 106, 7b not applicable
Low Temperature Storage Cold chamber at a temperature of -65 ±2°C for 24 ±4 hours
Vibration, High Frequency Frequency varied 10 to 2000Hz, 200G peak, 2 directions 6 hours each
Load Life 1000/2000 hours at rated power, +25°C, 1.5 hours “On”, 0.5 hours “Off”
Performance
±2.0%
±2.0%
±2.0%
±1.0%
±1.0%
±5.0%
±2.0%
±2.0%
±1.0%
±5.0%
50
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax [phone] • www.ohmite.com • [e-mail]
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