SURFACE MOUNT RESISTORS LR Series: Metal Alloy, Very Low-Resistance INTRODUCTION APPLICATIONS 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 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 Conditions of test Thermal Shock Test Method -55 °C to +125 °C, 1000 cycles, 15 minutes at each extreme Solderability test JIS C5202 7.4 Steam aging: 4hrs, cool down 30 minutes then test JIS C5202 6.5 -55°C for 1000 hours JIS C5202 7.1 1000 hours @ +155 °C JIS C5202 7.2 Low Temperature Storage High Temperature Exposure Mechanical Shock +85 °C, 85% RH, 10% Bias, 1000 hours, 90 minutes ”ON”, 30 minutes ”OFF” 100 grams for 6 milliseconds, 5 pulses JIS C5202 6.13 Vibration Frequency varied 55Hz in one minute, 3 directions, 12 hours JIS C5202 6.7 Load Life 1000 hours @ rated power, +100 °C, 1.5 hours “ON”, 0.5 hours “OFF” JIS C5202 7.10 Bias Humidity JIS C5202 7.9 Resistance to Solder Solder temp./immersion time: 260+5 °C, 10+1secs and 350+10 °C Heat 3.5+0.5secs JIS C5202 6.4 Moisture Resistance JIS C5202 7.6 Mil-STD-202, Method 106, 0% power, 7a and 7b not required Immersion time: 60+5 ÿ± secs, 20 °C~25 °C Resistance to solvent JIS C5202 6.9 DIMENSIONS Inch (mm) 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 L W H 0.063(1.60) 0.086(2.18) 0.026(0.66) 0.011(1.80) 0.115(2.92) 0.048(1.22) 0.009(2.29) 0.115(2.92) 0.095(2.41) 0.120(3.05) 0.145(3.68) 0.050(1.27) 0.083(2.11) 0.145(3.68) 0.125(3.18) 0.085ÿ±0.010 (2.15ÿ±0.254) 0.085ÿ±0.010 (2.15ÿ±0.254) 0.085ÿ±0.010 (2.15ÿ±0.254) 0.071ÿ±0.010 (1.8ÿ±0.254) 0.065ÿ±0.010 (1.65ÿ±0.254) 0.051ÿ±0.010 (1.3ÿ±0.254) 0.125(3.2) 0.27(6.9) 0.052(1.32) 0.045ÿ±0.010 (1.15ÿ±0.254) 0.108(2.75) 0.308(7.8) 0.136(3.5) 0.029ÿ±0.010 0.02ÿ±0.010 (0.750ÿ±0.254) (0.50ÿ±0.254) 0.20ÿ±0.010 (5.10ÿ±0.254) 0.10ÿ±0.010 (2.54ÿ±0.254) 0.031ÿ±0.010 (0.8ÿ±0.254) 0.246ÿ±0.010 (6.25ÿ±0.254) 0.13ÿ±0.010 (3.30ÿ±0.254) 0.031ÿ±0.010 (0.8ÿ±0.254) 0.051ÿ±0.010 (3.15ÿ±0.254) 0.031ÿ±0.010 (0.8ÿ±0.254) 0.074ÿ±0.010 (1.88ÿ±0.254) 0.044ÿ±0.010 (1.13ÿ±0.254) 0.268ÿ±0.010 (6.8ÿ±0.254) 0.264ÿ±0.010 (6.7ÿ±0.254) 0.039ÿ±0.010 (1.0ÿ±0.254) 0.043ÿ±0.010 (1.1ÿ±0.254) 0.039ÿ±0.010 (1.0ÿ±0.254) 0.035ÿ±0.010 (0.9ÿ±0.254) 3 4~100 i 0.062ÿ±0.010 2.5 LR3WR, LR3.5WR, LR4WR (2728) b (1.60ÿ±0.254) 1 2 a 0.12ÿ±0.010 4.1~100 1.5 T (3.15ÿ±0.254) 0.25, 0.5 LR4WSR (2725) SOLDER PAD DIMENSIONS 0.264ÿ±0.010 (6.7ÿ±0.254) 0.283ÿ±0.010 (7.2ÿ±0.254) 0.039ÿ±0.010 (1.0ÿ±0.254) RFE International • Tel:(949) 833-1988 • Fax:(949) 833-1788 • E-Mail [email protected] C2BB05 REV.2009.3.3 SURFACE MOUNT RESISTORS LR Series: Metal Alloy, Very Low-Resistance TEMP. COEFFICIENT LR1WMR (1206) LR1WSR (2010) DERATING CURVE Resistance Range Temp. Coeff. (PPM / C°) 1 ~ 4mÿ© W W 4.1 ~ 15mÿ© W 15.1 ~ 50mÿ© 0.5 ~ 3mÿ© W 3.1 ~ 6.9mÿ© W 7 ~ 100mÿ© W 50 -25 -15 50 -25 -15 LR1WR, W 0.5 ~ 3mÿ© LR1.5WR, LR2WR 3.1 ~ 6.9mÿ© W (2512) 100 80 60 40 20 0 -55 -30 50 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 Ambient Temperature (°C) 275 ºC -25 LR3WSR (2512) 0.5~1.5mÿ© W 50 1.6~10mÿ© W -25 LR4WSR (2725) W 0.25~0.9mÿ© 50 W 1~3mÿ© -25 LR3WSR, LR3.5WR (2728) W 4~7mÿ© -25 W 7.1~100mÿ© -15 W 4~7mÿ© -25 W 7.1~50mÿ© -15 LR4WR (2728) ü Operating Temp. Range -65°C ~ +275°C Rated Load (%) Type RoHS RATINGS & STANDARD RANGES Item LR1WMR (1206) LR1WSR (2010) LR1WR, LR1.5WR (2512) LR2WR, LR3WSR (2512) LR3WR, LR3.5WR (2728) LR4WSR (2725), LR4WR (2728) Resistance Range mW Power Max. Max. Rating at Rating Overload 100ÿ° C Current Current (Watts) 0.5% (D) 1% (F) 5% (J) 1 31.62A 126.49A 7~50 1~50 1~50 1 44.72A 178.89A 3~100 0.5~100 0.5~100 1 44.72A 223.61A 7~100 0.5~100 0.5~100 1.5 54.77A 273.86A 2 63.25A 252.98A 7~75 0.5~75 0.5~75 3 77.46A 232.38A 7~10 0.5~10 0.5~10 3 27.39A 82.16A 4~100 4~100 4~100 3.5 29.58A 88.74A 4 31.62A 126.49A 4~50 4~50 4~50 m OHM TO OHMS (m = milli) 100mW = 0.1W 150mW = 0.05W 155mW = 0.005W 0.5mW = 0.0005W PACKAGING Size Reel Tape Width Diameter Pieces/Reel 1206 8mm/Embossed Plastic 178mm/7” 2,000 2010 12mm/Embossed Plastic 178mm/7” 2,000 2512 12mm/Embossed Plastic 178mm/7” 1,000 2725 12mm/Embossed Plastic 178mm/7” 1,000 2728 12mm/Embossed Plastic 178mm/7” 1,000 PART NUMBER EXAMPLE LR1WSR - R05 - J RFE International • Tel:(949) 833-1988 • Fax:(949) 833-1788 • E-Mail [email protected] C2BB05 REV.2009.3.3