Resistors Double-Sided Chip Resistors Double-Sided Chip Resistors Welwyn Components DSC DSCSeries Series Two resistance elements in a single chip Twoparallel parallel resistance elements Excellent pulse withstand performance in a single chip Laser trimmed up 0.5% tolerance Excellent pulse to withstand performance Enhanced working voltage Laser trimmed up to 0.5% tolerance Enhanced power rating Enhanced working voltage Anti-sulphur version available. Enhanced power rating Pb-free terminations All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2) Electrical Data 0805 1206 2010 2512 0.125 0.25 0.33 0.75 1.5 0.8 1.6 2.1 4.7 9.4 0603 Power @70°C W 2 second overload power @25°C W Short pulse performance See graphs Resistance range ohms Tolerance 1R0 to 4M7 1R0 to 1M0 % LEV 10R to 1M: 0.5, All values: 1, 5 V TCR 200 150 75 ppm/°C Operating temperature Dielectric withstand voltage Thermal Impedance 400 500 _10R:100 <10R:200 > °C -55 to +155 V 500 °C/W Pad & trace area for rated power* mm2 302 210 160 80 50 30 40 50 60 100 Values E24 or 96 preferred - other values to special order Physical Data * Recommended minimum pad & adjacent trace area for each termination for rated power dissipation on FR4 PCB Dimensions (mm) & Weight (g) L W T max A B min C Wt. 0603 1.5±0.1 0.8±0.1 0.55 0.3±0.15 0.6 0.3±0.15 0.002 0805 2.0±0.3 1.25±0.2 0.7 0.3±0.15 0.9 0.3±0.15 0.012 1206 3.2±0.4 1.6±0.2 0.7 0.4±0.2 1.7 0.4±0.15 0.020 2010 5.1±0.3 2.5±0.2 0.8 0.6±0.3 3.0 0.6±0.25 0.036 2512 6.5±0.3 3.2±0.2 0.8 0.6±0.3 4.4 0.6±0.25 0.055 C T A B L A W Wrap-around terminations (3 faces) Construction Thick film resistor material, overglaze and organic protection are screen printed on a 96% alumina substrate. Wrap-around terminations have an electroplated nickel barrier and solderable coating, this ensures excellent ‘leach’ resistance properties and solderability. Marking Components are not marked. Reels are marked with type, value, tolerance, date code and quantity. Solvent Resistance The body protection is resistant to all normal industrial cleaning solvents suitable for printed circuits. General Note General Note 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. All information is subject to Welwyn’s 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. BI Technologies IRC Welwyn © Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK +44 (0)plc 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com ©Telephone: TT Electronics A subsidiary of TT electronics plc http://www.ttelectronics.com/resistors 04. 08 11.16 Double Sided Double Sided Chip Resistors Chip Resistors Welwyn Components DSC Series DSC Series Performance Data Load at rated power: 1000 hours at 70°C ΔR% Derating from rated power at 70°C ΔR% Maximum Typical 1 0.25 Zero at 155°C Overload: 6.25 x rated power for 2 seconds 1 0.1 Shelf life test: 12 months at room temperature ΔR% 0.1 0.02 Dry heat: 1000 hours at 155°C ΔR% 1 0.2 Long term damp heat ΔR% 1 0.25 Temperature rapid change ΔR% 0.25 0.05 0.25 0.05 0.25 0.05 Resistance to sulphur-bearing gas (AS version only): ASTM-B-809 ΔR% Resistance to solder heat Pulse Performance Data Lightning Surge 1.2/50µs Lightning Surge 10,000 2512 2512 2010 1206 2010 0805 1206 1,000 Peak Voltage (V) Resistors are tested in accordance with IEC 60 115-1 using both 1.2/50µs and 10/700µs pulse shapes. 10 pulses are applied. The limit of acceptance is a shift in resistance of less than 1% from the initial value. 0805 0603 100 10 1 10 100 1,000 10,000 100,000 Value (ohms) 1,000,000 10,000,000 10/700µs Lightning Surge 10,000 2512 2512 20102010 Peak Voltage (V) 1,000 12061206 08050805 0603 100 10 10 General Note 100 1,000 10,000 Value (ohms) 100,000 10,000,000 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. © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com © TT Electronics plc 1,000,000 http://www.ttelectronics.com/resistors 07. 08 11.16 Peak Voltag Double Sided Chip Resistors 1,000 100 1 DSC Series 10 100 1,000 10,000 100,000 1,000,000 10,000,000 Value (ohms) Single Pulse Single Pulse 1000 100 Peak Power (W) The single impulse graph is the result of 50 impulses of rectangular shape applied at one-minute intervals. The limit of acceptance was a shift in resistance of less than 1% from the initial value. 2512 2010 1206 2512 0805 10 2010 0603 1206 0805 1 0.0001 0.001 0.01 Pulse Duration (s) 0.1 1 Continuous Load Due to Repetitive Pulses Continuous Pulses 1000 100 Peak Power (W) The continuous load graph was obtained by applying repetitive rectangular pulses where the pulse period was adjusted so that the average power dissipated in the resistor was equal to its rated power at 70°C. Again the limit of acceptance was a shift in resistance of less than 1% from the initial value. 2512 2010 25121206 10 2010 0805 1206 1 0603 0805 0.1 0.0001 0.001 0.01 Pulse Duration (s) 0.1 1 © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com General Note 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. 07.08 BI Technologies IRC Welwyn http://www.ttelectronics.com/resistors © TT Electronics plc 11.16 Double Sided Double Sided Chip ChipResistors Resistors Welwyn Components DSC Series DSC Series Thermal Performance Data Temperature Derating Curve % of Rated Power 125 100 75 50 25 0 -15 Double Sided Chip Resistors Packaging 70 155 Ambient Temperature/°C Welwyn Components 0603, 0805 and 1206 resistors are supplied on 8mm carrier tape and 2010 and 2512 resistors are supplied on 12mm carrier tape, DSC Series Temperature Rise Curves all on 7 inch reels as per IEC 286-3. 80 Temperature Rise ( °C) Application Notes 2512 70 2010 60 0805 50 1206 of a printed circuit board and wire-leaded components applied on the other side. DSC is compatible with typical Pb-free soldering materials and temperature profiles. DSC resistors are ideally suited for handling by automatic 40 methods due to their rectangular shape and the small 30 dimensional tolerances. Electrical connection to a ceramic 20 substrate or to a printed circuit board can be made by reflow 10 or wave soldering of wrap-around terminations. DSC resistors themselves can operate at a maximum temperature of 155°C. For soldered resistors, the joint 0 0.5 1 1.5 temperature should not exceed 110°C. This condition is met Wrap-around terminations provide good leach properties and Power Dissipation (W) when the stated power levels at 70°C and recommended ensure reliable contact. Due to the robust construction, the pad and trace areas are used. Pad and trace area is defined as DSC can be immersed in the solder bath for 30 seconds at the total area of the solder pad plus all copper trace within two 260°C. This enables the resistor to be mounted on one side squares of the edge of the solder pad. Allowance should be made if smaller areas of copper are used. 0 7. Ordering Procedure – Replace with below Packaging Ordering Procedure 0603, 0805 and1206 DSC series resistors are supplied on 8mm carrier tape and 7 inch reels as per IEC 286-3, quantity per reel; 3000. 2010 and 2512 DSC series resistors are supplied on 12mm carrier tape and 7 inch reels as per IEC 286-3, quantity per reel; (DSC2512, 10available kilohmson±1%, Pb-free) 2010Example: : 3000pcs;DSC2512-10KFT18 2512 : 1800pcs. Reels of 1000pcs are request. D S C 2 5 1 1 2 1 Type 2 Size DSC 0603 0805 1206 2 3 1 0 K 4 T 5 3 Anti-Sulphur AS F 1 8 6 4 Value 5 Tolerance Omit for Standard E24 = 3/4 characters D ±0.5% Anti-Sulphur E96 = 3/4 characters R = ohms F J ±1% ±5% 2010 K = kilohms 2512 M = megohms General Note 6 Termination & Packing Standard Pb-free finish T5 0603 0805 5000/reel standard T3 1206 3000/reel standard T18 2010 2512 1800/reel standard T1 All sizes 1000/reel available PB SnPb finish All sizes Standard quantities as for Pb-free BI Technologies IRC Welwyn TT Electronics reserves the right to make changes in product specification without notice or liability. All information subject to TT Electronics’ ownBedlington, data and is considered accurate at time of going © Welwyn isComponents Limited Northumberland NE22 7AA, UK to print. Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com 8. Update header & footer branding http://www.ttelectronics.com/resistors 07. 08 © TT Electronics plc 11.16