PRODUCT BULLETIN WILLOW TECHNOLOGIES LTD. SHAWLANDS COURT, NEWCHAPEL ROAD LINGFIELD, SURREY, RH7 6BL, ENGLAND Tel. + 44 (0) 1342 835234 Fax. + 44 (0) 1342 834306 E-mail rob@willow.co.uk Website http://www.willow.co.uk LRC-SERIES Fractional Ohm METAL FILM STANDARD INDUSTRY CASE SIZES 0805 1206 2010 2512 POWER RATINGS .25W, .50W, .75W & 1.0W TCR ±75, ±100 & ±200 PPM/°C TOLERANCE 1% LOW INDUCTANCE WRAP AROUND TERMINATION TERMINATION BARRIER FOR INNER ELECTRODE PROTECTION STABLE CURRENT DETECTING RESISTOR P Specifications INCHES MILLIMETERS Dimension TYPE L W H P LRC1220L (0805) 0.079 ±0.006 (2.00 ±0.15) 0.049 ±0.006 (1.25 ±0.15) 0.020 ±0.006 (0.50 ±0.15) 0.016 ±0.010 (0.40 ±0.25) LRC1632L (1206) 0.126 ±0.006 (3.20 ±0.15) 0.063 ±0.006 (1.60 ±0.15) 0.024 ±0.006 (0.60 ±0.15) 0.020 ±0.010 (0.50 ±0.25) LRC2550L (2010) 0.200 ±0.006 (5.10 ±0.15) 0.098 ±0.006 (2.50 ±0.15) 0.024 ±0.006 (0.50 ±0.15) 0.024 ±0.010 (0.60 ±0.25) LRC3264L (2512) 0.250 ±0.006 (6.30 ±0.15) 0.126 ±0.006 (3.20 ±0.15) 0.024 ±0.006 (0.50 ±0.15) 0.024 ±0.010 (0.60 ±0.25) Operating Temperature Range is -55°C to +125°C Resistance Tolerance ± 1% L Resistance Range W Temperature Coefficient 0.025 .049 0.05 .099 0.1 1.0 H ± 200 PPM/°C ± 100 PPM/°C ± 75 PPM/°C In addition the 0805 part is available from 0.01 .99 Power Ratings Termination (Outer) Termination (Barrier) Termination (Inner) Protective Coating Resistive Element Case Size 0805 1206 2010 2512 Available Values All E6 values plus the following Wattage 0805 2010 .25W @ 70°C .50W @ 70°C .75W @ 70°C 1.0W @ 70°C 2.0 2.5 5.0 Alumina Substrate How to Order Sample Part Number LRC1632L TC100 0.1R @ ±200 PPM/°C 1206 2512 2.0 2.4 2.5 2.7 3.9 5.0 5.6 7.5 8.2 1.2 1.6 2.0 2.5 4.0 5.0 6.5 ±1% Resistance Tolerance Resistance Value Temperature Coefficient Type DEDICATION TO EXCELLENCE Subject to change without notice Continued on reverse side REV C 1/14/00 Performance Data LOAD LIFE R ±(0.5% +.0005Ω) HUMIDITY R ±(0.5% +.0005Ω) TEMPERATURE CYCLE R ±(0.5% +.0005Ω) SHORT TIME OVERLOAD R ±(0.5% +.0005Ω) EFFECTS OF SOLDER HEAT R ±(0.5% +.0005Ω) Operating Temperature Range is -55°C to +125°C Derating Curve For resistors operated in ambient above 70°C, power dissipation must be derated in accordance with the curve in Fig. 1. 100 80 Ratio to 60 Dissipation (%) 40 20 0 -60 -55 -40 -20 0 20 40 Ambient Temperature (°C) 60 80 70 100 120 140 125 Figure 1 Data subject to change without notice See other side REV C 1/14/00