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| Datasheet File OCR Text: |
| General Purpose Surface Mounted Resistors WCR Series Welwyn Components * Excellent reliability * Wide range of sizes and ohmic values * Wrap around terminations * Inner electrode protection Electrical Data Power rating at 70 C Resistance range Limiting element voltage TCR Resistance tolerance Standard values Ambient temperature range 0402 0603 1206 2010 2512 0805 watts 0.063 0.1 0.125 0.25 0.5 1.0 ohms to 2M2 1R to 22M 1R 22M 1R to 1R to 10M 4R7 to 1R to 22M 10M volts 50 50 150 200 200 200 ppm/ C see table below see table below % E24 / E96 preferred. Other values to special order C -55 to 155 1 <50 Zero Ohm Jumper Chip Rating A Zero Ohm Jumper Chip Resistance mOhms <50 1 1.5 2 <50 <50 <50 2 Tolerance/Resistance/TCR Tolerance 1206@1/4W WCR WCR 2010 WCR 2512 WCR 0402 WCR 0603 WCR 0805 Ohmic TCR Ohmic TCR Ohmic TCR TCR Ohmic TCR Ohmic TCR Ohmic Range ppm ppm Range ppm Range ppm Range ppm Range ppm Range (Ohms) / C (Ohms) /C * (Ohms) /C * (Ohms) /C * (Ohms) /C (Ohms) /C* * MIN MAX MAX MIN MIN MAX MIN MAX MIN MAX MIN MAX 100R 100K 50 100R 100K 50 100R 100K 100 10R 1MO 100 1R 10M 100 1R 10M 100 1R0 9R1 -100 to +600 100 10R 1M 1R 10M 300 100 10R 1M 200 1R 10M 200 1R 10M 200 10R 1M0 200 10R 1M 10R 1M 200 4R7 2M2 300 1R 10M 200 1R 10M 200 10R 1M 200 1M0 10M 300 1R 10M 300 11M 22M 300 11M 22M 300 * Notes - TCR forTCR for low values 1R to 4R3 -100 to +600 ppm/C. 200ppm/C *Note: low values 1R to 10R: -400 to +600ppm/C, 11R to 100R: TCR for high values 3M3 to 22M: 300ppm/C 0.5% 1% 2% 5% 10% Physical Data TCR for high values 3M3 to 22M 300ppm/C. Dimensions (mm) Style L W T C A 0.1 1.0 0.05 0.5 0.03 0.35 0.05 0.20 0.1 0.25 0402 0.5 + 0.15 -0.05 1.6 0.15 0.8 0.15 0603 0.25 0.2 0.25 0.2 0805 2.0 + 0.2 0.4 0.2 0.4 1.25 + 0.2 -0.1 0.5 + 0.15 -0.10 0.2 0.5 + 0.2 1206 3.2 + 0.1 -0.15 1.6 + 0.1 -0.15 0.55 + 0.15 -0.05 0.5 + 0.2 -0.25 -0.25 5.0 0.15 2.5 0.15 0.56 0.15 0.60 0.25 0.60 0.25 2010 C A T 2512 6.3 0.15 3.2 0.15 0.56 0.15 0.60 0.25 0.60 0.25 L W A Wrap-around terminations (3 faces) 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. A subsidiary of TT electronics plc Issue E 07.03 Issue D * 02.07 * (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 15 General Purpose Surface Mounted Resistors WCR Series Construction 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) Figure 1 Welwyn Components Tin Plating Nickel Barrier Dipped Conductor Silver Palladium Epoxy Melamine Protection Glass Dielectric Resistance Element Terminations Solderability Strength The terminations meet the requirements of IEC 115-1, Clause 4.17.3.2. The terminations meet requirements of IEC 68.2.21. 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. 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. 96% min Alumina Substrate Table 1 Resistance value ohms 100R >100R, 10K >10K, 100K >100K, 1M0 >1M0 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. 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 (7 inch) reel iscarrying double the standard quantity 250mm (10 inch) reel standard carries 5,000 pieces. (Except 0402 carries 10,000 pieces) can be supplied by agreement. 250mm (10 inch) reel carrying double the standard quantity can be supplied by agreement. 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. solution for designers and your prototype build requirements. (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 E 07.03 Issue D * 02.07 * |
Price & Availability of WCR1206-10KDI
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