resistors NPR surface mount molded current sense resistor EU features • • • • • • Surface mount power resistors Flame retardant type (UL94V0) Current detecting resistors for power supplies, etc. Metal plate terminals Marking: Black body color with teal marking Products with lead-free terminations meet EU RoHS requirements. EU RoHS regulation is not intended for Pb-glass contained in electrode, resister element and glass. dimensions and construction L Size Code W b t Electrode c c Molded Resistive Resin Element a L W Dimensions inches (mm) t a b c NPR1 .295±.02 .177±.012 .079±.012 .098±.012 .051±.012 .055±.012 (7.5±0.5) (4.5±0.3) (2.0±0.3) (2.5±0.3) (1.3±0.3) (1.4±0.3) NPR2 .472±.02 .315±.012 .157±.02 .157±.012 .118±.02 (12.0±0.5) (8.0±0.3) (4.0±0.5) (4.0±0.3) (3.0±0.5) .059±.02 (1.5±0.5) ordering information New Part # NPR Type 1 T Power Rating 1 2 Termination Material T: Sn (Other termination styles may be available, please contact factory for options) TE Packaging TE: Embossed plastic (1,000 pieces/reel) 100 Nominal Resistance ±1%: 3 significant figures + 1 multiplier “R” indicates decimal point <100Ω ±5%, ±10%: 2 significant figures + 1 multiplier “R” indicates decimal point <10Ω All values <0.1Ω regardless of tolerance use “L” as decimal Ex: 91mΩ = 91L 3.9mΩ = 3L9 J Tolerance F: ±1% J: ±5% K: ±10% For further information on packaging, please refer to Appendix A. Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 52 1/17/13 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com surface mount molded current sense resistor applications and ratings Part Designation T.C.R. (ppm/°C) Max. Power Rating NPR1 1W NPR2 2W Absolute Maximum Working Voltage Resistance Range E-24 (F±1%) (J±5%) (K±10%) ±100: R≥0.1Ω ±200: R<0.1Ω 0.1Ω - 10MΩ 10mΩ - 22MΩ 3.9mΩ - 9.1mΩ Absolute Maximum Overload Voltage 350V 700V 500V 1000V Rated Operating Ambient Temperature Temperature Range -55°C to +180°C +70°C environmental applications Derating Curve Surface Temperature Rise 100 150 NPR2 1 Temperature Rise (°C) % Rated Power 80 NPR1 1 100 60 40 20 0 -60 -40 -20 -55 0 20 40 80 100 120 140 160 180 70 Ambient Temperature (°C) 1 Hot Spot 2 Solder Joint NPR1 2 50 0 60 NPR2 2 0 25 50 75 100 % Rated Power For resistors operated at an ambient temperature of 70°C or above, a power rating shall be derated in accordance with the above derating curve. Regarding the temperature rise, the value of the temperature varies per conditions and board for use since the temperature is measured under our measuring conditions. Performance Characteristics Parameter Resistance T.C.R. Overload Resistance to Solder Heat Rapid Change of Temperature Moisture Resistance Endurance at 70°C Low Temperature Operation Requirement ∆ R ±% Limit Typical Within regulated — tolerance Within specified — T.C.R. ±1.0% ±1.0% ±1.0% ±1.0% ±1.0% ±1.0% ±2.0% ±1.5% ±2.0% ±0.5% ±0.5% ±0.25% Test Method 25°C +25°C/+125°C Rated voltage x 2.5 for 5 seconds 260°C ± 5°C, 10 seconds ± 1 second -40°C (30 minutes), +155°C (30 minutes), 5 cycles 40°C ± 2°C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle -55°C, 1 hour Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 12/17/12 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com 53 resistors NPR