Resistors Pulse Withstanding Pulse Withstanding Chip Resistors Welwyn Components Chip Resistors PWC Series P WExCcellen Seriet pulse withss tand performance Improved working voltage Excellent pulse withstand performance Improved power rating Improved working voltage Custom designs available Improved power rating Anti-sulphur version availab le Standard chip sizes (0805 to 2512) Custom designs available AllAll Pb-Pb-frfreeee partsparts ccomplyomply withwith EUEU DirDirectivectivee 2011/65/EU2011/65/EU amended amended b yb y(EU) (EU) 2015/863 2015/863 (R (RoHS3)oHS3) 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 E24 or 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 (mm) & weight (mg) C L W T max A B min C Wt. T 1.60.1 0.80.1 0.55 0.30.15 0.6 0.30.15 2.2 0603 A B 2.00.15 1.250.15 0.6 0.30.15 0.9 0.30.1 4.7 0805 L W A 1206 3.20.2 1.60.2 0.7 0.40.2 1.7 0.40.15 8.5 Wrap-around terminations (3 faces) 2010 5.10.3 2.50.2 0.8 0.60.3 3.0 0.60.25 36 2512 6.50.3 3.20.2 0.8 0.60.3 4.4 0.60.25 55 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 5R 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 www.ttelectronics.com/resistors Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK 07. 08 TT Electronics plcTelephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com 05.19 37Resistors 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. www.ttelectronics.com/resistors Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com 07. 08 TT Electronics plc 05.19