 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| Surface Mounted Thermistors PTCR Series Welwyn Components * TCR's up to +3500 ppm * Custom designs available * Solder terminations have a nickel barrier layer * Resistance range 10 ohms to 800 ohms * Tolerances down to 2% * Available in 0805 and 1206 sizes Electrical Data Commercial Power rating at 70C Resistance range Limiting element voltage TCR -55C to 155C Resistance tolerance at 20C Ambient temperature range Values Thermal impedance watts ohms volts ppm/C % C ohms C/watt 360 2, 5, 10 -55 to 155 E24 & E96 preferred 200 Any value to order For 10 devices mounted on a 50 x 25mm p.c.b. area PTCR 0805 0.1 10R to 400R 100 PTCR 1206 0.25 10R to 800R 200 See table below Notes Variation of TCR within Value Range Value range (ohms) 10 to <25 25 to <50 50 to <100 10 to <200 200 to <400 400 to <800 TCR (ppm/C) 3500 10% 3100 10% 2900 10% 2700 15% 2400 15% 2200 15% Resistance (ohms) 10000 1000 800R 100 10 1 -55 10R -15 25 65 105 Temperature C 145 Physical Data Dimensions (mm) and weight (g) Style 0805 1206 L W T max 0.6 0.7 A B* Wt nom 0.009 A Wrap-around terminations (3 faces) T B L 2.0 0.3 1.25 0.2 3.2 0.4 1.6 0.2 0.3 0.15 0.9 min 0.4 0.2 1.7 min 0.0090 A W *This dimension determines the number of conductors which may pass under the surface mounted device. 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 C * 08.04 (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 37 Surface Mounted Thermistors PTCR Series Construction Thick film resistor material, overglaze and organic protection are screen printed on a 96% alumina substrate. Welwyn Components Marking All relevant information recorded on the primary package or reel. Terminations Wrap-around terminations are suitable for soldering. 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 10 seconds. Solvent Resistance The chips are resistant to all normal industrial cleaning fluids suitable for printed circuits. Performance Data Maximum Load at rated power: 1000 hours at 70C Shelf life: 12 months at room temperature Derating from rated power at 70C Dry heat: 1000 hours at 155C Climatic category Long term damp heat Temperature rapid change Resistance to solder heat Voltage proof R% R% R% volts 3 2 2 500 R% 2.5 55 / 155 / 56 1 0.5 0.5 R% R% 5 3 Zero at 155C 1 Typical 1 0.5 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. Packing As standard 3000 chips are supplied taped and reeled on 8mm tape to IEC 286-3. Ordering Procedure Specify type reference, value and tolerance as shown in this example of PTCR1206 400R 2%: Type Resistance value (IEC62 code) Tolerance (IEC62 code) F G J 1% 2% 5% Mounting This chips resistor is ideally suited for handling by automatic methods due to its rectangular shape and small dimensional tolerances. Electrical connection to a ceramic substrate or to a printed circuit board can be made by flow or reflow soldering of wraparound terminations. The terminations provide good `leach' properties and ensure reliable contact. Due to the robust construction the resistor chip can be immersed in a solder bath for 10 seconds at 260C. This enables the resistor to be mounted on one side of a printed circuit board and wire-leaded components on the other side. 1206 400R G (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 38 Issue C * 08.04 |
Price & Availability of PTCR0805
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |