NPS 2-T126 Power SMD Resistors • • • • • • • Resistances from 0.025Ohm to 10kOhms Power Rating to 25Watt Resistance Tolerances to ±1% TCR to ±100ppm/°C Load Stability to 0.5% TO-126 Housing (D-Pak) Solder Reflow Secure at 260°C / 20s SPECIFICATIONS Type NPS 2-T126 Terminals Resistance Range 2 0.025 to 0.049Ohms 0.05 to 0.099Ohms Power Rating (with heatsink) Thermal Resistance Rthj-c 1Ohms to 10kOhms 6.0 K/W Tolerances (others upon request) 2% / 5% 1% / 2% / 5% Stability Temperature Coefficient (TCR 50ppm upon request) 0.1 to 0.99Ohms 25 W 0.5% ±500 ppm/°C Voltage Proof ±400 ppm/°C ±300 ppm/°C ±100 ppm/°C 2.0 kV DC Operating Temperature -40°C to 175°C Resistor Material Thick Film Substrate Al2O3 Housing Epoxy Connector Material Cu / Ni-flash / lead-free tinned Reflow soldering lead-free soldering 260°C / 20s Ordering Information Part Description: Part Type - Resistance - Tolerance NPS 2-T126 1.1 Ohms 1% Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com Page 83 07/13 NPS 2-T126 Power SMD Resistors SPECIFICATIONS (continued) Derating 120 Power Rating Notes - The NPS Series Resistors must be attached to a suitable heatsink. The maximum internal resistor temperature is 175°C. To specify an appropriate heatsink use the following formula : Power (% from nominal power) 100 80 RqH = TMAX - ( P x RqR ) - TA P 60 40 20 0 0 25 40 55 70 85 100 115 130 145 155 175 Temperature of the backplate (°C) Where:RqH = Thermal Resistance of Heatsink ( K/W ) RqR = Thermal Resistance of Resistor ( K/W ) TMAX = Maximum Temperature of Resistor TA = Ambient Temperature of Heatsink ( °C ) P = Power Through Resistor ( W ) Dimensions Dimension mm tol. (±mm) inches tol. (±inches) A 8.26 0.2 0.33 0.008 B 8.13 0.2 0.32 0.008 C 6.35 0.1 0.25 0.004 D 4.31 0.1 0.17 0.004 E 1.35 0.1 0.05 0.004 F 5.08 0.1 0.20 0.004 G 0.76 0.1 0.03 0.004 H 2.79 0.1 0.11 0.004 0.004 I 0.8 0.1 0.03 J 9.55 0.2 0.38 0.008 K 10.92 0.2 0.43 0.008 0.008 L 12.32 0.2 0.49 M 0.6 0.1 0.02 0.004 N 1.47 0.1 0.06 0.004 Dimension mm inches A 8.51 0.335 B 7.87 0.310 C 14.1 0.555 D 5.08 0.200 E 1.65 0.065 F 3.81 0.150 Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com Page 84 07/13