General Purpose Surface Resistors Mounted Resistors Welwyn Components General Purpose Surface General Purpose Surface Welwyn Components Mounted Resistors WCR Series Mounted Resistors Excellent reliability WCR Series Wide range of sizes and ohmic values Excellent reliability Wrap around terminations WCR Series Wide range of sizes and ohmic values Inner electrode protection Excellent reliability Wrap around terminations Wide range of sizes and ohmic values Inner electrode protection Wrap around terminations Inner electrode protection AEC-Q200 grade available AllAll partsparts araree Pb-Pb-frfreeee andand ccomplyomply withwith EUEU DirDirectivectivee 2011/65/EU2011/65/EU amendedamended bbyy (EU)(EU) 2015/8632015/863 (R(RoHS3)oHS3) Electrical Data 0201 0402 0603 0805 1206 1210 2010 2512 Electrical Data 0.05 0.063 0.1 0.125 0.25 0.25 0.5 1.0 Power rating 70C watts Resistance range ohms 10R to 1M0 1R0 to 1M0 1R0 to 10M 0201 0402 0603 0805 1206 1210 2010 2512 Resistance Range AEC-Q200 ohms 10R to 1M0 0.05 0.063 0.1 0.125 0.25 0.25 0.5 1.0 Power rating 70C watts 25 50 75 150 200 Limiting element votage volts Resistance range ohms 10R to 1M0 1R0 to 1M0 1R0 to 10M 250 100 200 TCR* ppm/C Resistance Range AEC-Q200 ohms 10R to 1M0 1 Resistance Tolerance % 25 50 75 150 200 Limiting element votage volts E24 or E96 Standard values 250 100 200 TCR* ppm/C -55 to 155 Ambient temperature range C 1 Resistance Tolerance % 0.5 1 1.5 2 Zero-ohm Jumper Chip Rating amps E24 or E96 Standard values Zero-ohm Jumper Chip Resistance milliohms <50 -55 to 155 Ambient temperature range C * Notes TCR for low values 1R to 10R: -400 to +600ppm/C, 11R to 100R: 200ppm/C 0.5 1 1.5 2 Zero-ohm Jumper Chip Rating amps TCR for high values 3M3 to 10M: 300ppm/ Physical Data Zero-ohm Jumper Chip Resistance milliohms <50 Dimensions (mm) * Notes TCR for low values 1R to 10R: -400 to +600ppm/C, 11R to 100R: 200ppm/C TCR for high values 3M3 to 10M: 300ppm/ Physical Data L W T C A Style C 0.6 0.03 0.23 0.03 0.1 0.05 0.15 0.05 0201 0.3 0.03 Dimensions (mm) 1.0 0.1 0.5 0.05 0.35 0.05 0.2 0.1 0.25 0.1 0402 T L 1.6 0.1 T 0.45 0.1C 0.3 0.2A 0.3 0.2 Style 0603 W 0.8 0.1 C A 0.6 0.03 0.23 0.03 0201 2.0 0.150.3 0.03 0.55 0.10.1 0.05 0.4 0.20.15 0.05 0.4 0.2 0805 1.25 + 0.15 -0.1 1.0 0.1 0.35 0.05 0.2 0.1 0.25 0.1 L 0402 3.1 0.150.5 0.05 1.55 + 0.15 -0.1 0.55 0.1 0.45 0.2 0.45 0.2 1206 W A T 1.6 0.1 3.1 0.10.8 0.1 0.45 0.1 0.55 0.10.3 0.2 0.5 0.250.3 0.2 0.5 0.2 0603 1210 2.6 0.2 A Wrap-around terminations 2.0 0.15 0.55 0.1 0.4 0.2 0.4 0.2 0805 1.25 + 0.15 -0.15.0 0.1 2.5 0.2 0.55 0.1 0.60 0.25 0.5 0.2 2010 (3 faces) 3.1 0.15 6.35 0.1 0.55 0.1 0.55 0.10.45 0.2 0.60 0.250.45 0.2 0.5 0.2 L 1206 2512 1.55 + 0.15 -0.1 3.2 0.2 W A 3.1 0.1 0.55 0.1 0.5 0.25 0.5 0.2 1210 2.6 0.2 Wrap-around terminations 5.0 0.1 0.55 0.1 0.60 0.25 0.5 0.2 2010 2.5 0.2 Figure 1 (3 faces) Construction 6.35 0.1 3.2 0.2 0.55 0.1 0.60 0.25 0.5 0.2 2512 Tin Plating The chips have a high alumina substrate (96% minimum) with Nickel Barrier a ruthenium oxide resistance element and silver palladium, Figure 1 Construction Dipped Conductor nickel and tin plated terminations. A glazed protection coat Tin Plating The chips have a high alumina substrate (96% minimum) with is applied to the resistive element (See Fig.1) Epoxy MelamineProtection Nickel Barrier a ruthenium oxide resistance element and silver palladium, Glass Dielectric Terminations Silver Dipped Conductor nickel and tin plated terminations. A glazed protection coat Resistance Element Palladium Solderability The terminations meet the requirements of is applied to the resistive element (See Fig.1) Epoxy Melamine Protection IEC 115-1, Clause 4.17.3.2. Glass Dielectric Terminations Silver Strength The terminations meet requirements of Resistance Element Palladium Solderability The terminations meet the requirements of IEC 68.2.21. IEC 115-1, Clause 4.17.3.2. Strength The terminations meet requirements of 96% min Alumina Substrate IEC 68.2.21. General Note 96% min Alumina Substrate Welwyn Components 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. TT electronics plc General Note General Note Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK BI Technologies IRC Welwyn Welwyn Components reserves the right to make changes in product specification without notice or liability. Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com Iss 07.03 TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyns own data and is considered accurate at time of going to print. A subsidiary of 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 T TT Electronics plcelephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com Iss 07.03 05.21General Purpose Surface Mounted Resistors General Purpose Surface Mounted Resistors WCR Series WelwynComponents WCR Series Table 1 Marking All resistors are individually marked with 3 digits. The first two Resistance Noise value ohms dB digits are the significant figures and the third defines the 100R -10 number of added zeros. Jumpers are marked 000. Types 0201 >100R, 10K 0 and 0402 have no marking. >10K, 100K +15 E96 1% components that can not be marked with 4 digits >100K, 1M0 +20 will be marked with a standard 3 digit code. Details can be >1M0 +30 supplied upon request. Solvent Resistance The protective epoxy lacquer and marking are resistant to all normal industrial cleaning fluids suitable for printed circuits. Performance Data Maximum Change 0201 0402 0603 0805 1206 1210 2010 2512 R% Load: 1000 hrs at 70C 10R-100K : 1 4R7-100K : 1 1R-100K : 1 1R-100K : 1 1R-100K : 1 1R-100K : 1 1R-100K : 1 3% + 0.1R >100K : 2 >100K : 2 >100K : 2 >100K : 2 >100K : 2 >100K : 2 >100K : 2 Shelf life: 12 months at room temp. R% 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Derate linearly to zero from 70C zero 155 C Short term overload (6.25 x rated power) R% 2 2 2.5 2.5 2.5 2.5 2.5 5 Max voltage volts 50 100 100 200 400 400 400 400 Climatic R% 3 3 3 3 3 3 3 3 Climatic Catagory 55/125/56 1 Long term damp heat R% Temperature rapid change R% 1 1 1 1 1 1 1 1 R% Resistance to solder heat 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 Vibration and bump R% 1 1 1 1 1 1 1 1 Noise see table 1 Insulation resistance ohms > 1G Voltage proof volts 100 300 500 500 500 500 500 Packaging Packaging All chips in 1210 size and smaller are tape mounted and supplied on standard 8mm paper tape, 2010 size on 12mm paper All chips are tape mounted and supplied on standard 8mm Chip Resistor Labstock For Designers tape or plastic tape, and 2512 size on 12mm plastic tape reel, as IEC publication 286-3. tape reel, as IEC publication 286-3. WCR chip resistors are available in a special package of the most 180mm (7 inch) reel is standard 180mm (7 inch) reel is standard carries 5,000 pieces. popular sizes containing 50 each of the E24 values. 250mm (10 inch) reel carrying double the standard quantity (Except 0402 carries 10,000 pieces) Please contact the sales desk for full details of this excellent can be supplied by agreement. Note: For zero ohm jumper chips use the dummy value & tolerance code R005J General Note BI Technologies IRC Welwyn TT Electronics reserves the right to make changes in product specification without notice or liability. Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK All information is subject to TT Electronics own data and is considered accurate at time of going to print. Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com 01.11 Issue D 07.03 www.ttelectronics.com/resistors TT Electronics plc 05.21