LRC-LRF_E.qxd 12/23/04 10:07 AM Page 1 Low Value Flat Chip Resistor Welwyn Components LRC/LRF Series • • • Standard 2512, 2010 and 1206 sizes • • Low inductance - less than 0.2nH Resistance values down to 0.003 ohms Leach resistant solder-plated copper wrap-around termination Standard EIA Tape - 1206 = 8mm; 2010 or 2512 = 12mm Electrical Data LR1206 LR2010 LR2512 Power rating at 70°C watts 0.5 1.0 1.5/2.0* Resistance range ohms 0R010 to 1R 0R003 to 1R 0R003 to 1R volts 200 200 200 Dielectric withstanding voltage TCR ppm/°C Resistance tolerance ±100 (Contact factory for value below 0.050 ohms) ≤R005 5%, >R005 1, 2, 5% % Temperature rise at rated power Pad and trace area for max power rating @ 70°C °C 40 80 90 mm2 30 30 100 2 *2 Watts with total solder pad and trace size of 300 mm Physical Data Dimensions (mm) Size L W H (max) D D1 LR1206 3.20±0.305 1.63±0.203 0.8 0.48±0.25 0.48±0.25 LR2010 5.23±0.38 2.64±0.25 0.8 0.48±0.25 0.48±0.25 LR2512 6.50±0.38 3.25±0.25 0.8 0.48±0.25 0.48±0.25 LR 1225 LR 1206 / 2010 / 2512 D W W H L H D D1 L Protective Overcoat Resistive Element Copper Termination Solder Plating Nickel Barrier Layer Copper Wraparound Termination Alumina Substrate 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 © Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com Issue E · 12.04 23 LRC-LRF_E.qxd 12/23/04 10:07 AM Page 2 Low Value Flat Chip Resistor Welwyn Components LRC/LRF Series Dimensions (mm) A B C LR1206 2.0 4.0 1.25 LR2010 3.05 6.5 1.5 LR2512 3.7 7.75 1.5 A B C Test Method Performance Thermal Shock MIL-STD-202 Method 107 Condition B, -65°C +125°C ±0.5% Short Time Overload MIL-PRF-55342 ±0.5% High Temperature Exposure MIL-PRF-55342 ±0.5% MIL-STD-883 Method 1010 Test Condition B ±0.25% Moisture MIL-PRF-55342 ±0.5% Load Life MIL-PRF-55342 Rated Power @ 70°C ±1.0% Low Temperature Operation MIL-PRF-55342 ±0.5% Low Temperature Storage -65°C, 100 Hours ±0.5% MIL-STD-202 Method 210 ±0.25% Molten Solder 250°C 90 seconds minimum Temperature Cycling Resistance to Solder Heat Leach Resistance (%) 100 80 Power Rating Characteristics 60 40 20 0 70 25 150 (°C) Ambient temperature LRC 2512 1 w at 2 t LRC 2010 0.5 1 wwatt LR C 12 06 0.5 25ww atat tt Note: For resistance values R025 and below part will be supplied as type LRF. Components must be mounted with resistance value marking face up to ensure correct resistance value and tolerance. Ordering Procedure Example: LRF2512 at 10 milliohms (hence flip-chip mounted) and 2% tolerance on a reel of 1800 pieces LRF2512–R01GW Type Mounting F Conventional (element up) Flip-chip (element down) Values > R025 Values < R025 Size Value (use IEC62 code) Tolerance (use IEC62 code) F G J 1% 2% 5% Packing W T1 Tape 1206 or 2010 2512 All sizes 3000/reel 1800/reel 1000/reel Standard © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com Issue E · 12.04