General Purpose Surface Resistors Welwyn Components Mounted Resistors General Purpose Surface Mounted Resistors Welwyn Components General Purpose Surface WCR Series Mounted Resistors Excellent reliability WCR Series Wide range of sizes and ohmic values WCR SeriesExcellent reliability Wrap around terminations 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 All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2) 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 Limiting element votage volts 25 50 150 200 0.05 0.063 0.1 0.125 0.25 0.25 0.5 1.0 Power rating 70C watts TCR* ppm/C 250 100 200 Resistance range ohms 10R to 1M0 1R0 to 1M0 1R0 to 10M Resistance Tolerance % 1 Limiting element votage volts 25 50 150 200 Standard values E24 or E96 250 100 200 TCR* ppm/C -55 to 155 Ambient temperature range C 1 Resistance Tolerance % Zero-ohm Jumper Chip Rating amps 0.5 1 1.5 2 Standard values E24 or E96 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 Zero-ohm Jumper Chip Rating amps 0.5 1 1.5 2 TCR for high values 3M3 to 10M: 300ppm/ Zero-ohm Jumper Chip Resistance milliohms <50 Physical Data * 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/ Dimensions (mm) Physical Data L T C A Style W C 0.6 0.03 0.23 0.03 0.12 0.05 0.15 0.05 0201 0.3 0.03 Dimensions (mm) 1.0 0.1 0.35 0.05 0.2 0.1 0.25 0.1 0402 0.5 0.05 T L 1.6 0.15W T 0.5 0.15C 0.25 0.2A 0.25 0.2 Style 0603 0.8 0.15 C A 0.6 0.03 0.23 0.03 0.12 0.05 0.15 0.05 0201 2.0 0.20.3 0.03 1.25+ 0.2 -0.1 0.5 + 0.15 -0.10 0.4 0.2 0.4 0.2 0805 1.0 0.1 3.2 +0.1 -0.250.5 0.05 0.35 0.05 0.55 +0.15 -0.10.2 0.1 0.5 + 0.2-0.250.25 0.1 0.5+ 0.2 -0.25 L 0402 1206 1.6 + 0.1 -0.15 W A T 1.6 0.15 0.5 0.15 0.25 0.2 0.25 0.2 0603 3.2 + 0.1 -0.20.8 0.15 2.6 0.15 0.55 +0.15 -0.1 0.5 0.25 0.5 0.2 1210 A Wrap-around terminations 2.0 0.2 5.0 0.15 0.5 + 0.15 -0.10 0.56 0.150.4 0.2 0.60 0.250.4 0.2 0.60 0.25 0805 2010 1.25+ 0.2 -0.1 2.5 0.15 (3 faces) L 3.2 +0.1 -0.25 1.6 + 0.1 -0.156.3 0.15 0.55 +0.15 -0.1 0.56 0.150.5 + 0.2-0.25 0.60 0.250.5+ 0.2 -0.25 1.2 0.85 1206 2512 3.2 0.15 W A 3.2 + 0.1 -0.2 0.55 +0.15 -0.1 0.5 0.25 0.5 0.2 1210 2.6 0.15 Wrap-around terminations 5.0 0.15 2.5 0.15 0.56 0.15 0.60 0.25 0.60 0.25 2010 Figure 1 (3 faces) Construction 6.3 0.15 0.56 0.15 0.60 0.25 1.2 0.85 2512 3.2 0.15 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 coat nickel and tin plated terminations. A glazed protection Tin Plating The chips have a high alumina substrate (96% minimum) with is applied to the resistive element (See Fig.1) Epoxy Melamine Protection 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 MelamineProtection 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. Iss 07.03 Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com 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.ttelectronicsresistors.com Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK TT Electronics plc Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com Iss 07.03 04.16General Purpose Surface General Purpose Surface Mounted Resistors Mounted Resistors WCR Series WelwynComponents WCR Series Table 1 Marking Resistance Noise All resistors are individually marked with 3 digits. The rst two value ohms dB digits are the signi cant gures and the third de nes 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 uids suitable for printed circuits. Performance Data Maximum Change 0201 0402 0603 0805 1206 1210 2010 2512 Load: 1000 hrs at 70C R% 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 zero 155 C Derate linearly to zero from 70C R% 2 2 2.5 2.5 2.5 2.5 2.5 5 Short term overload (6.25 x rated power) 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 Resistance to solder heat R% 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 are tape mounted and supplied on standard 8mm All chips are tape mounted and supplied on standard 8mm Chip Resistor Labstock For Designers 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. W elwyn 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 www.ttelectronicsresistors.comIssue D 07.03 TT Electronics plc 04.16