Resistors Pulse Withstanding Welwyn Components Chip Resistors Pulse Withstanding Chip Resistors PWC Series Excellent pulse withstand performance PWC Series Improved working voltage Excellent pulse withstand performance Improved power rating Improved working voltage Standard chip sizes (0805 to 2512) Improved power rating CustomCustom designs a designsv ailableavailable Anti-sulphur version availab le All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2) Electrical Data Size PWC0603 PWC0805 PWC1206 PWC2010 PWC2512 0.125 0.25 0.33 0.5 0.75 1 1.5 2 Power 70C W Resistance range ohms 1R0 to 10M Tolerance % 10R to 1M: 0.5, All values: 1, 5 LEV V 75 150 200 400 500 <10R:200 10R:100 TCR ppm/C Operating temperature C -55 to +155 Thermal Impedance C/W 302 220 160 145 80 70 55 40 2 Pad / trace area * mm 30 40 50 125 60 250 100 500 Values E96 preferred - other values to special order See graphs full application note available on request Pulse Capability *Recommended minimum pad & adjacent trace area for each termination for rated power dissipation on FR4 PCB Physical Data Dimensions of PWC resistors are given below in mm and weight in g C L W T max A B C Wt. T 1.50.1 0.80.1 0.55 0.30.15 0.6 min 0.30.15 0.002 0603 A B 2.00.3 1.250.2 0.6 0.30.15 0.9 min 0.30.1 0.009 0805 L W A 1206 3.20.4 1.60.2 0.7 0.40.2 1.7 min 0.40.15 0.020 Wrap-around terminations (3 faces) 2010 5.10.3 2.50.2 0.8 0.60.3 3.0 min 0.60.25 0.036 2512 6.50.3 3.20.2 0.8 0.60.3 4.4 min 0.60.25 0.055 Construction Marking Thick film resistor material, overglaze and organic protection Components are not marked. Reels are marked with type, are screen printed on a 96% alumina substrate. Wrap-around value, tolerance, date code and quantity. terminations have an electroplated nickel barrier and solder coating, this ensures excellent leach resistance properties Solvent Resistance and solderability. The body protection is resistant to all normal industrial cleaning solvents suitable for printed circuits. Note that anti-sulphur version parts below 100R are produced in flip-chip format with the resistor element on the underside. General Note General Note BI Technologies IRC Welwyn Welwyn Components reserves the right to make changes in product specification without notice or liability. TT Electronics reserves the right to make changes in product specification without notice or liability. A subsidiary of All information is subject to Welwyns own data and is considered accurate at time of going to print. All information is subject to TT Electronics own data and is considered accurate at time of going to print. TT electronics plc Pulse Withstanding Pulse Withstanding Chip Resistors Chip Resistors PWC Series Welwyn Components PWC Series Performance Data Size Maximum Typical Load at rated power: 1000 hours at 70C R% 1 0.25 Shelf life test: 12 months at room temperature R% 0.1 0.02 Derating from rated power at 70C Zero at 155C Overload: 6.25 x rated power for 2 seconds R% 1 0.1 Dr y heat: 1000 hours at 155C R% 1 0.2 Long term damp heat R% 1 0.25 Temperature rapid change R% 0.25 0.05 Resistance to solder heat R% 0.25 0.05 Resistance to sulphur-bearing gas (AS version only): ASTM-B-809 0.25 0.05 Voltage proof Volts 500 Note: A 0.01 Ohm addition to be added to the performance of all resistors <10 Ohms. Pulse Performance Data Pulse Performance Data Lightning Surge lightning surge resistors are tested in accordance with IEC 60 115-1 using both 1.2/50s and 10/700s pulse shapes. 10 pulses are applied. The limit of acceptance is a shift in resistance of less than 1% from the initial value. 2512 2010 1206 0805 0603 Lightning Surge lightning surge resistors are tested in accordance with IEC 60 115-1 using both 1.2/50s and 10/700s pulse shapes. 10 pulses are applied. The limit of acceptance is a shift in resistance of less than 1% from the initial value. 2512 2010 1206 0805 0603 General Note BI Technologies IRC Welwyn TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics own data and is considered accurate at time of going to print.