NCW 0406 AT, NCW 0612 AT www.vishay.com Vishay Beyschlag Low Ohmic Wide Terminal Thin Film Chip Resistors FEATURES Resistance range down to 0.1 Low TCR of 50 ppm/K Excellent overall stability Rated power dissipation P up to 1 W for size 0612 85 Advanced sulfur resistance verified according to ASTM B 809 Superior moisture resistivity (85 C 85 % RH) AEC-Q200 qualified Superior temperature cycling robustness NCW AT low ohmic resistors are the perfect choice for most Material categorization: for definitions of compliance fields of modern professional power measurement please see www.vishay.com/doc 99912 electronics where reliability, stability, power dissipation and robust design is of major concern. The product features APPLICATIONS extraordinary temperature cycling robustness, verified Automotive through extensive testing. The permissible power rating is specified with up to 1 W for size 0612. Typical applications Industrial include power electronics in automotive and industrial High power and high temperature applications appliances (e.g. burden resistors). TECHNICAL SPECIFICATIONS DESCRIPTION NCW 0406 AT NCW 0612 AT Imperial size 0406 0612 Metric size code RR1016M RR1632M Resistance range 0.33 to 0.91 0.10 to 0.91 Resistance tolerance 1 % Temperature coefficient 50 ppm/K (1) Rated dissipation P 0.3 W 1 W 85 Operating voltage, U AC /DC Limited by P max. RMS 85 (1) Permissible film temperature, 175 C F max. Operating temperature range -55 C to 175 C (1) Internal thermal resistance 30 K/W TBD Permissible voltage against ambient (insulation): 1 min U 75 V ins Note (1) Please refer to APPLICATION INFORMATION below APPLICATION INFORMATION When the resistor dissipates power, a temperature rise above the ambient temperature occurs, dependent on the thermal resistance of the assembled resistor together with the printed circuit board. The rated dissipation applies only if the permitted film temperature is not exceeded. Please consider the application note Thermal Management in Surface-Mounted Resistor Applications (www.vishay.com/doc 28844) for information on the general nature of thermal resistance. These resistors do not feature a limited lifetime when operated within the permissible limits. However, resistance value drift increasing over operating time may result in exceeding a limit acceptable to the specific application, thereby establishing a functional lifetime. Revision: 03-Mar-2020 Document Number: 28849 1 For technical questions, contact: thinfilmchip vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc 91000 NCW 0406 AT, NCW 0612 AT www.vishay.com Vishay Beyschlag MAXIMUM RESISTANCE CHANGE AT RATED DISSIPATION ADVANCED OPERATION MODE STANDARD POWER TEMPERATURE P P P 70 70 85 Rated dissipation NCW 0406 AT 0.2 W 0.25 W 0.3 W (1) NCW 0612 AT 0.5 W 0.75 W 1.0 W Operating temperature range -55 C to 125 C -55 C to 155 C -55 C to 175 C Permissible film temperature, 125 C 155 C 175 C F max. NCW 0406 AT 0.33 to 0.91 0.33 to 0.91 0.33 to 0.91 NCW 0612 AT 0.10 to 0.91 0.10 to 0.91 0.10 to 0.91 Max. resistance change at P for 70 1000 h 0.15 % 0.3 % 0.5 % resistance range, R/R after: 8000 h 0.25 % 0.5 % - 225 000 h 1.0 % - - Notes The presented operation modes do not refer to different types of resistors, but actually show examples of different loads, that lead to different film temperatures and different achievable load-life stability (drift) of the resistance value. A suitable low thermal resistance of the circuit board assembly must be safeguarded in order to maintain the film temperature of the resistors within the specified limits. Please consider the application note Thermal Management in Surface-Mounted Resistor Applications (www.vishay.com/doc 28844) for information on the general nature of thermal resistance (1) Specified power rating requires a thermal resistance R 90 K/W of the circuit board assembly th The resistance value of low ohmic precision resistors is influenced by the resistance of the terminations. The exact resistanc e value of the soldered part on the PCB may deviate depending on e.g. solder quantity, pad layout, and soldering method. The resistance value of the unmounted part can be verified by a 4-point probe on the top side termination as shown below. Y X Fig. 1 DIMENSIONS FOR 4-POINT PROBE X Y TYPE / SIZE (m) (m) NCW 0406 AT 870 600 NCW 0612 AT 1300 1240 Revision: 03-Mar-2020 Document Number: 28849 2 For technical questions, contact: thinfilmchip vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc 91000