LR1WMR

SURFACE MOUNT RESISTORS LR Series: Metal Alloy, Very Low-Resistance INTRODUCTION RFE International, Inc. LR Series of low resistance Surface Mount Resistors are ideal for applications where low resistance, tight tolerance and temperature stability is important. Current sense, power supply, Industrial controls, are a few of the applications suitable for this series of resistor. RoHS ü APPLICATIONS • • • • • • • • Power Supply Battery Pack DIY Tools Inverter / Converter (AC/DC, DC/DC, DC/AC) Test Equipment Precision Measuring Equipment LED Driver Automotive PERFORMANCE Test Item Thermal Shock Solderability test Low Temperature Storage High Temperature Exposure Bias Humidity Mechanical Shock Vibration Load Life Conditions of test -55 °C to +125 °C, 1000 cycles, 15 minutes at each extreme Steam aging: 4hrs, cool down 30 minutes then test -55°C for 1000 hours 1000 hours @ +155 °C +85 °C, 85% RH, 10% Bias, 1000 hours, 90 minutes ”ON”, 30 minutes ”OFF” 100 grams for 6 milliseconds, 5 pulses Frequency varied 55Hz in one minute, 3 directions, 12 hours 1000 hours @ rated power, +100 °C, 1.5 hours “ON”, 0.5 hours “OFF” Test Method JIS C5202 7.4 JIS C5202 6.5 JIS C5202 7.1 JIS C5202 7.2 JIS C5202 7.9 JIS C5202 6.13 JIS C5202 6.7 JIS C5202 7.10 JIS C5202 6.4 JIS C5202 7.6 JIS C5202 6.9 Resistance to Solder Solder temp./immersion time: 260+5 °C, 10+1secs and 350+10 °C Heat 3.5+0.5secs Moisture Resistance Resistance to solvent Mil-STD-202, Method 106, 0% power, 7a and 7b not required Immersion time: 60+5 secs, 20 °C~25 °C ÿ± DIMENSIONS DIMENSIONS Model LR1WMR (1206) LR1WSR (2010) LR1WR, LR1.5WR, LR2WR, LR3WSR (2512) Resistance Range mÿ© W 1~50 0.5~3 4~100 0.5~4 4.1~100 0.25, 0.5 1 1.5 2 2.5 3 LR3WR, LR3.5WR, LR4WR (2728) 0.268ÿ± .010 0 (6.8ÿ± .254) 0 0.264ÿ± .010 0 (6.7ÿ± .254) 0 0.039ÿ± .010 0 (1.0ÿ± .254) 0 0.043ÿ± .010 0 (1.1ÿ± .254) 0 0.039ÿ± .010 0 (1.0ÿ± .254) 0 L 0.12ÿ± .010 0 (3.15ÿ± .254) 0 0.20ÿ± .010 0 (5.10ÿ± .254) 0 W 0.062ÿ± .010 0 (1.60ÿ± .254) 0 0.10ÿ± .010 0 (2.54ÿ± .254) 0 H 0.029ÿ± .010 0 (0.750ÿ± .254) 0 0.031ÿ± .010 0 (0.8ÿ± .254) 0 T 0.02ÿ± .010 0 (0.50ÿ± .254) 0 0.051ÿ± .010 0 (3.15ÿ± .254) 0 0.031ÿ± .010 0 (0.8ÿ± .254) 0 0.074ÿ± .010 0 (1.88ÿ± .254) 0 0.044ÿ± .010 0 (1.13ÿ± .254) 0 0.085ÿ± .010 0 (2.15ÿ± .254) 0 0.085ÿ± .010 0 (2.15ÿ± .254) 0 0.085ÿ± .010 0 (2.15ÿ± .254) 0 0.071ÿ± .010 0 (1.8ÿ± .254) 0 0.065ÿ± .010 0 (1.65ÿ± .254) 0 0.051ÿ± .010 0 (1.3ÿ± .254) 0 0.045ÿ± .010 0 (1.15ÿ± .254) 0 0.063(1.60) 0.011(1.80) 0.009(2.29) 0.120(3.05) 0.083(2.11) 0.086(2.18) 0.115(2.92) 0.115(2.92) 0.145(3.68) 0.145(3.68) a b Inch (mm) SOLDER PAD DIMENSIONS i 0.026(0.66) 0.048(1.22) 0.095(2.41) 0.050(1.27) 0.125(3.18) 0.246ÿ± .010 0 (6.25ÿ± .254) 0 0.13ÿ± .010 0 (3.30ÿ± .254) 0 0.031ÿ± .010 0 (0.8ÿ± .254) 0 LR4WSR (2725) 0.125(3.2) 0.27(6.9) 0.052(1.32) 0.035ÿ± .010 0 (0.9ÿ± .254) 0 4~100 0.264ÿ± .010 0 (6.7ÿ± .254) 0 0.283ÿ± .010 0 (7.2ÿ± .254) 0 0.039ÿ± .010 0 (1.0ÿ± .254) 0 0.108(2.75) 0.308(7.8) 0.136(3.5) RFE International • Tel:(949) 833-1988 • Fax:(949) 833-1788 • E-Mail Sales@rfeinc.com C2BB05 REV.2009.3.3 SURFACE MOUNT RESISTORS LR Series: Metal Alloy, Very Low-Resistance TEMP. COEFFICIENT Type LR1WMR (1206) LR1WSR (2010) Resistance Range 1 ~ 4mÿ© W W 4.1 ~ 15mÿ© W 15.1 ~ 50mÿ© 0.5 ~ 3mÿ© W 3.1 ~ 6.9mÿ© W 7 ~ 100mÿ© W Temp. Coeff. (PPM / C°) 50 -25 -15 50 -25 -15 50 -25 50 -25 50 -25 -25 -15 -25 -15 100 RoHS ü DERATING CURVE Operating Temp. Range -65°C ~ +275°C Rated Load (%) 80 60 40 20 0 -55 -30 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 275 ºC LR1WR, W 0.5 ~ 3mÿ© LR1.5WR, LR2WR 3.1 ~ 6.9mÿ© W (2512) LR3WSR (2512) LR4WSR (2725) LR3WSR, LR3.5WR (2728) LR4WR (2728) 0.5~1.5mÿ© W 1.6~10mÿ© W W 0.25~0.9mÿ© W 1~3mÿ© W 4~7mÿ© W 7.1~100mÿ© W 4~7mÿ© W 7.1~50mÿ© Ambient Temperature (°C) RATINGS & STANDARD RANGES Item Power Max. Max. Rating at Rating Overload 100ÿ° C Current Current (Watts) 1 1 1 1.5 2 3 3 3.5 4 31.62A 44.72A 44.72A 54.77A 63.25A 77.46A 27.39A 29.58A 31.62A 126.49A 178.89A 223.61A 273.86A 252.98A 232.38A 82.16A 88.74A 126.49A 4~50 4~50 4~50 7~75 7~10 4~100 0.5~75 0.5~10 4~100 0.5~75 0.5~10 4~100 Resistance Range mW 0.5% (D) 7~50 3~100 1% (F) 1~50 0.5~100 5% (J) 1~50 0.5~100 m OHM TO OHMS (m = milli) 100mW = 0.1W 150mW = 0.05W 155mW = 0.005W 0.5mW = 0.0005W LR1WMR (1206) LR1WSR (2010) LR1WR, LR1.5WR (2512) LR2WR, LR3WSR (2512) LR3WR, LR3.5WR (2728) LR4WSR (2725), LR4WR (2728) 7~100 0.5~100 0.5~100 PACKAGING Size 1206 2010 2512 2725 2728 Reel Tape Width 8mm/Embossed Plastic 12mm/Embossed Plastic 12mm/Embossed Plastic 12mm/Embossed Plastic 12mm/Embossed Plastic Diameter 178mm/7” 178mm/7” 178mm/7” 178mm/7” 178mm/7” Pieces/Reel 2,000 2,000 1,000 1,000 1,000 PART NUMBER EXAMPLE LR1WSR - R05 - J C2BB05 REV.2009.3.3 RFE International • Tel:(949) 833-1988 • Fax:(949) 833-1788 • E-Mail Sales@rfeinc.com