High Power Dissipation SMT Chip Resistor SC3 Series • • • • Tolerances to ±1% 3 watt rating at 70°C Resistance range from 1 to 100KΩ Standard Sn/Pb and matte tin (Pb-free) terminations available Electrical Data Power Derating Chart Resistance Range 1W to 100KW Resistance Tolerance ±1%, ±2%, ±5% Power Dissipation % Of Rated Power Temperature Coefficient 100 ±100 ppm/°C 3.0 Watts* @70°C Maximum Voltage Rating _____ (not to exceed √ P X R ) Operating Temperature Range 100 Volts -55°C to +150°C 50 10 Leach-resistant nickel barrier under solder-plated wraparound Termination 25° 70° 150° Temperature in °C *Note: With 1” square copper area as heat spreader. Physical Data TOP BOTTOM RECOMMENDED SOLDER PAD LAYOUT (Board Side) 0.250” ± .005” 0.125” ±.005” 33R0 0.020”±.005” 0.032” ±.005” Plating wrap-around 0.30” 7.6mm 0.090” ±.005” 0.08” (2.0mm) 0.030” ±.005” thickness SCHEMATIC 0.04” (1mm) General Note IRC reserves the right to make changes in product specification without notice or liability. All information is subject to IRC’s own data and is considered accurate at time of going to print. Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com A subsidiary of TT electronics plc SC3 Series Issue October 2008 High Power Dissipation SMT Chip Resistor Temperature Rise vs Pad Area Temperature Rise (°C) 1000 100 10 2 100mm 200mm 2 1000mm 2 Termination Pad Area (each end) 1 watt 2 watts 3 watts Pulse Power Rating Power (watts) 100 10 1 0.1 1.0 10.0 Time (sec) Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com SC3 Series Issue October 2008 High Power Dissipation SMT Chip Resistor Environmental Data Environmental Test Test Method Specification MIL-STD-202 Method 107 Condition B, -65°C + 125°C ∆R ±0.5% + 0.01W 2x rated power for 5 seconds ∆R ±0.5% + 0.01W 100 Hours, 150°C ∆R ±0.5% + 0.01W MIL-STD-202 Method 106 ∆R ±0.5% + 0.01W Rated Power @ 70°C for 1000 hours; 1.5 hours ‘on’, 0.5 hours ‘off’ ∆R ±1.0% + 0.01W 1 hour @ -65°C followed by Rated power for 45 minutes ∆R ±0.5% + 0.01W Resistance To Solder Heat MIL-STD-202 Method 210 260°C, 5 seconds ∆R ±0.25% + 0.01W Solderability MIL-STD-202 Method 208 245°C, 5 seconds 95% coverage Thermal Shock Short-time Overload High Temperature Exposure Moisture Resistance Load Life Low Temperature Operation Ordering Data Prefix SCW - SC3LF - 33R0 - F Model SC3 = 3 watt chip with standard Sn/Pb termination SC3LF = 3 watt chip with matte tin (Pb-free) termination Resistance Code Standard 4-digit resistance code Example: 33R0 = 33Ω; 10K0 = 10,000Ω Resistance Tolerance Code J = ±5%; G = ±2%; F = ±1% Packaging Available in both bulk and tape & reel. For additional information or to discuss your specific requirements, please contact our Applications Team using the contact details below. Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com SC3 Series Issue October 2008