General Purpose Surface Mounted Resistors Welwyn Components WCR Series s Excellent reliability s Wide range of sizes and ohmic values s Wrap around terminations s Inner electrode protection Electrical Data 0201 Power rating @ 70C Resistance range Limiting element votage TCR* Resistance Tolerance Standard values Ambient temperature range Zero-ohm Jumper Chip Rating Zero-ohm Jumper Chip Resistance Physical Data watts ohms volts ppm/C % C amps milliohms 0603 0402 0.1 0.05 0.063 10R to 1M0 25 50 250 0.5 0805 1206 0.125 0.25 0.25 1R0 to 10M 1210 150 100 2512 0.5 1.0 200 200 1 E24 or E96 -55 to 125 1.5 <50 1 2010 2 * 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) Style 0201 0402 0603 0805 1206 1210 2010 2512 L T C W 0.6 0.03 0.23 0.03 0.12 0.05 0.3 0.03 1.0 0.05 0.35 0.05 0.2 0.1 0.5 0.03 1.6 0.15 0.5 0.15 0.25 0.2 0.8 0.15 2.0 0.2 0.4 0.2 1.25+ 0.2 -0.1 0.5 + 0.15 -0.10 3.2 +0.1 -0.25 1.6 + 0.1 -0.15 0.55 +0.15 -0.1 0.5 + 0.2-0.25 3.2 + 0.1 -0.2 0.55 +0.15 -0.1 0.5 0.25 2.6 0.15 5.0 0.15 0.56 0.15 0.60 0.25 2.5 0.15 6.3 0.15 0.56 0.15 0.60 0.25 3.2 0.15 A 0.15 0.05 0.25 0.1 0.25 0.2 0.4 0.2 0.5+ 0.2 -0.25 0.5 0.2 0.60 0.25 0.60 0.25 The chips have a high alumina substrate (96% minimum) with a ruthenium oxide resistance element and silver palladium, nickel and tin plated terminations. A glazed protection coat is applied to the resistive element (See Fig.1) Terminations Strength T A L A W Wrap-around terminations (3 faces) Figure 1 Construction Solderability C The terminations meet the requirements of IEC 115-1, Clause 4.17.3.2. The terminations meet requirements of IEC 68.2.21. Tin Plating Nickel Barrier Dipped Conductor Silver Palladium Epoxy Melamine Protection Glass Dielectric Resistance Element 96% min Alumina Substrate General Note Welwyn Components 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. (c) 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 A subsidiary of TT electronics plc Iss 07.03 General Purpose Surface Mounted Resistors Welwyn Components WCR Series Table 1 Marking All resistors are individually marked with 3 digits. The first two digits are the significant figures and the third defines the number of added zeros. Jumpers are marked 000. Types 0201 and 0402 have no marking. Resistance value ohms 100R >100R, 10K >10K, 100K >100K, 1M0 >1M0 E96 1% components that can not be marked with 4 digits will be marked with a standard 3 digit code. Details can be supplied upon request. Noise dB -10 0 +15 +20 +30 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 Load: 1000 hrs at 70C Shelf life: 12 months at room temp. 0402 0603 0805 1206 R% 10R-100K : 1 4R7-100K : 1 1R-100K : 1 1R-100K : 1 1R-100K : 1 R% >100K : 2 >100K : 2 >100K : 2 >100K : 2 >100K : 2 0.2 0.2 0.2 0.2 0.2 1210 2010 1R-100K : 1 1R-100K : 1 >100K : 2 >100K : 2 0.2 0.2 2512 3% + 0.1R 0.2 zero @ 125 C Derate linearly to zero from 70C 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 Short term overload (6.25 x rated power) Climatic Catagory Long term damp heat 55/125/56 1 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 1 500 500 500 500 Noise see table 1 Insulation resistance ohms Voltage proof volts > 1G 100 Packaging Packaging All chips are tape mounted and supplied on standard 8mm All chips are tape mounted and supplied on standard 8mm tape reel, as IEC publication 286-3. tape reel, as IEC publication 286-3. 180mm (7 inch) reel is standard 180mm (10 (7 inch) standard carriesthe 5,000 pieces. 250mm inch)reel reeliscarrying double standard quantity (Except 0402 carries 10,000 pieces) can be supplied by agreement. 500 500 Chip Resistor Labstock For Designers Chip Resistor Labstock For Designers WCR chip resistors are available in a special package of the most WCR chip resistors are available in a special package of the most popular sizes containing 50 each of the E24 values. popular sizes containing 50 each of the E24 values. Please contact the sales desk for full details of this excellent Please contact the sales desk for full details of this excellent solution for designers and your prototype build requirements. Note: For zero ohm jumper chips use the dummy value & tolerance code R005J (c) 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 Issue D * 02.09 07.03