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| Surface Mounted Resistors CR Series Welwyn Components * CECC released products * Custom designs/sizes available * Any resistance value available within specified range * Terminations available for wire bonding or soldering * Available in sizes down to 0503 * Resistance range 1 ohm to100M ohms * Tolerances down to 0.1% * Solder terminations have a nickel barrier layer * Shorting Links available Electrical Data Commercial Power rating at 70C Resistance range Limiting element voltage TCR -55 to +155C Resistance tolerance Ambient temperature range Approved CECC 40401-004 Power rating at 70C Resistance range Limiting element voltage TCR -55C to +125C TCR +20C to +70C Resistance tolerance Ambient temperature range Approved CECC 40401-008 Power rating at 70C Resistance range Limiting element voltage TCR -55C to +155C Resistance tolerance Ambient temperature range Approved CECC 40401-003 Power rating at 70C Resistance range Limiting element voltage TCR -55C to +125C Resistance tolerance Ambient temperature range Values Thermal impedance C/watt 800 360 watts ohms volts ppm/C % C CR0503 0.063 1R to 10M 50 CR0805 0.125 CR1005 CR1206 CR2010 CR2512 0.125 0.25 0.5 1.0 1R to 100M 1R to 1M 100 150 200 400 500 <10 ohms 350: 10 to 100 ohms 200: 100 to 1M ohm 100: >1M ohm 250 0.1, 0.25, 0.5, 1, 2, 5 -55 to 155 CR1206 0.25 Notes See table of value ranges watts ohms volts ppm/C ppm/C % C CR0805 0.125 1R to 10M 100 200 <10 ohms 200: 10 to 1M 100: >1M 200 <10 ohms 200: 10 to 1M 50: >1M 100 0.5, 1, 2, 5 -55 to +125 CR0805 CR1206 CR2010 0.125 0.25 0.5 1R to 10M 1R to 10M 1R to 1M 100 200 400 <10 ohms 200: 10 to 1M ohms 100: >1M ohms 250 0.1, 0.25, 0.5, 1, 2, 5 -55 to 155 CR0805 CR1206 0.063 0.125 1R to 3M 1R to 5M 100 200 <5 ohms 500: 5 to 10 ohms 350: 10 to 3M ohms 100: >3M ohms 250 0.25, 0.5, 1, 2, 5 -55 to 125 E24 & E96 preferred 290 200 80 70 CR2512 1.0 1R to 1M 500 See table of value ranges watts ohms volts ppm/C % C See table of value ranges watts ohms volts ppm/C % C See table of value ranges Any value to order Mounted on custom designed PCB's 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 F * 10.05 (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 17 Surface Mounted Resistors CR Series Welwyn Components Physical Data Dimensions of Standard Styles (mm) & Weight (g) Wrap around Style 0503 0805 1005 1206 2010 2512 L W T max 0.5 0.6 0.7 0.7 0.7 0.7 A B C 0.200.1 0.30.1 0.40.15 0.40.15 N/A N/A Wt 0.005 0.009 0.015 0.020 0.036 0.055 Alternative styles for surface mounting resistors A B L A W T 1.250.2 0.63.15 2.00.2 1.250.15 2.50.3 1.250.2 3.20.2 5.10.3 6.50.3 1.60.2 2.50.2 3.20.2 Not available 0.30.15 0.9 min Not available 0.40.2 0.60.3 0.60.3 1.7 min 3.0 min 4.4 min C C T Wrap-around terminations (3 faces) L W Planar terminations This dimension determines the number of conductors which may pass under the surface mounted device. Construction Thick film resistor material, overglaze and organic protection are screen printed on a 96% alumina substrate. Solderability Wrap-around terminations have an electroplated nickel barrier and solder coating, this ensures excellent `leach' resistance properties and solderability. They will withstand immersion in solder at 260C for 30 seconds. Terminations Planar (or single-sided) termination is gold and suitable for wire-bonding; wrap-around is suitable for soldering. Marking All relevant information recorded on the primary package or reel. Performance Data CECC 40401-008 CECC40401-004 CECC40401-003 Requirements Load at rated power: 1000 hours at 70C Shelf life: 12 months at room temp. Derating from rated power at 70C Overload Dry Heat: 1000 hours at UCT (125C for 003 & 004 - 155C for 008) Long term damp heat Temperature rapid change Resistance to solder heat Voltage proof R% R% R% volts 2 0.5 0.5 0805 : 200 2010 : 400 2 0.5 0.5 1206 : 300 2512 : 500 R% R% R% 2 Zero at 155C R% 0805:1 1206:0.5 2 Requirements 2 Zero at 125C 0.5 1 Requirements 3M3 2 >3M3 3 Zero at 125C 2 3M3 2 >3M3 3 2 1 2 1 to 10M 1 >10M 2 1 0.25 0.25 0503 : 100 All others : 500 0.1 0.2 >10M 1 0.25 0.05 0.05 0.1 0.02 Maximum 2 Actual Typical 0.25 Note: An 0.01 ohm addition to be added to the performance of all resistors <10 ohms Value Ranges (ohms) Tolerance Size 0503 0805 1005 1206 2010 2512 5 1 to 10M 1 to 100M 1 to 100M 1 to 100M 1 to 1M 1 to 1M 2 1 to 10M 1 to 50M 1 to 50M 1 to 50M 1 to 1M 1 to 1M 1 10 to 10M 1 to 20M 1 to 20M 1 to 25M 1 to 1M 1 to 1M % 0.5 100 to 1M 10 to 10M 10 to 10M 10 to 10M 10 to 10M 10 to 10M 0.25 N/A 100 to 1M 100 to 1M 100 to 1M 100 to 1M 100 to 1M 0.1 N/A 100 to 1M 100 to 1M 100 to 1M N/A N/A (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 18 Issue F * 10.05 Surface Mounted Resistors CR Series Welwyn Components Application Notes Operating Temperature Range The chips themselves can operate at a maximum temperature of 155C (see performance claims above). For soldered chips, the joint temperature should not exceed 110C. This condition is met when the stated power levels at 70C are used. Packaging Wrap-around Termination Chip resistors are supplied taped and reeled on standard 8mm tape to IEC 286-3. Quantity per reel; 3000 max. Mounting This chip resistor is ideally suited for handling by automatic methods due to its rectangular shape and the small dimensional tolerances. Electrical connection to a ceramic substrate or to a printed circuit board can be made by wire bonding (eg suffix `G' in CR0805G) or by reflow soldering of wrap-around terminations (eg suffix `F' in CR0805F). The `F' terminations provide good leach properties and ensure reliable contact. Due to the robust construction the resistor chip can be immersed in the solder bath for 30 seconds at 260C. This enables the resistor to be mounted on one side of a printed circuit board and other wire-leaded components on the other side. Planar Terminations Resistor chips are supplied in waffle packs. Ordering Procedure Specify type reference, value and tolerance as shown in this example of CR0805 10M 0.1%: Type Resistance value (IEC62 code) Tolerance (IEC62 code) B C D F G J 0.1% 0.25% 0.5% 1% 2% 5% CR0805 10M B (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 F * 10.05 19 |
Price & Availability of CR2010
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