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E00204 85C12 ES56030 T9G012 02241 STC22 R2030 ED06B5
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 Thick Film Low Resistance Kelvin Flip Chip
LRK Series
Welwyn Components
* Precision low resistance applications * Flip chip with Kelvin design * Low temperature coefficient * Resistance to 0.003 ohms * Tolerance down to 1.0% * 2 watt power dissipation at 70C
Electrical Data
LRK Resistance range Tolerance Operating temperature range TCR Power dissipation (at 70C) Temperature rise at 2 watts ohms % C ppm/C watts C R003-R100 to 1 -55 to +150 100 (down to 0.010) 2.00 70
Physical Data
Dimensions (mm) A 6.5000.380 B 3.2500.250 A 1 B 3 S 2 S 1.778 C 0.7400.100 E D 0.5080.127 E 0.7870.178
BOTTOM
4 D
SIDE
C
Recommended Solder Pad Layout
Dimensions (mm) A 2.54 B 2.413 A C D B C 1.778 D 1.27
Schematic Layout
1 2
R
3
4
The LRK low range flip chip resistor series offers very low resistance four terminal (Kelvin) layout for applications requiring low cost and precision current measurement. The LRK flip chip utilises patented, non-noble copper based inks which demonstrate high performance, precision and reliability.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyn's own data and is considered accurate at time of going to print. A subsidiary of TT electronics plc Issue B * 03.02
(c) Welwyn Components Limited * Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com
31
Thick Film Low Resistance Kelvin Flip Chip
LRK Series
Welwyn Components
Performance Data
Test Thermal shock Short time overload High temperature exposure Temperature cycling Moisture resistance Load life Low temperature operation Test Method MIL-STD-202, method 107D -55 to 125C, 5 cycles 30 Min MIL-PRF-55342 MIL-PRF-55342 100 hours at 125C MIL-STD-833, method 1010 test condition B MIL-STD-202, method 106E MIL-STD-202, method 108 rated power 1000 hours at 70C MIL-PRF-55342 Typical Performance 0.5% 0.5% 0.5% 0.25% 0.5% 1.0% 0.5%
Derating Curve
120
Packaging
Resistors are supplied taped and reeled.
Rated Power (%)
100 80 60 40 20 0
30
50
70
90
110
130
150
Ambient Temperature (oC)
(c) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com 32
Issue B * 03.02


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