FA8025 WELWYN | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 2
Technical content
- Predictable fusing characteristics Flameproof protection FA8225 FA8325 FA8425 5.15.052.0sttawC˚07 ta gnitar rewoP k22 - 51R0k72 - 1R0k01 - 1R0smhoegnar ecnatsiseR 005053052stlovegatlov tnemele gnitimiL 052052052C˚/mppRCT 5%ecnarelot ecnatsiseR Standard values E24 preferred 09021051ttaw/C˚ecnadepmi lamrehT 551 ot 55-C˚egnar erutarepmet tneibmA 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. © 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 Electrical Data Issue B · 03.02 A subsidiary of TT electronics plc Welwyn Components 153 Construction The metal film is deposited on a high purity ceramic rod. End caps are force fitted and termination wires welded to the caps. The resistive film is adjusted to the required value by a helical cut; finally the cement protection is applied to the resistor body and marked with indelible ink. Terminations Material Solder-coated copper wire. Strength The terminations meet the requirements of IEC 68.2.21. Solderability The terminations meet the requirements of IEC 115-1, Clause 4.17.3.2. Marking Resistors are colour coded with five bands. Four of the bands are used to indicate value and tolerance, with IEC 62 colours being used. On FA8325 and FA8425 types a fifth yellow band denotes constant voltage fusibility. Solvent Resistance The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. Flammability The resistors will not burn or emit incandescent particles under any condition of applied temperature or power overload. Dimensions (mm) & Weight (g) PCB Min. mounting bend Type L max D max f min d nom centres radius Wt. nom Physical Data LD f d dia 2.5 Issue C · 01.07
© 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 B · 03.02 Welwyn Components 154 b f1 f2 c Body Location f1 – f2 1.4 mm Packaging The preferred method of packaging is taped and ammo packed, see figure 1 for critical dimensions. Alternative packaging is available by special request. Lead Formed resistors can also be supplied. Standard options of Lancet, Radial and Goalpost forming are shown in Lead Form Information section. Figure 1 Normal rated power Fusing Time (secs) Min power for guaranteed fusing Max sale fusing powerMin fusing time Max fusing time Initial Power (watts) Graph 1 Graph 2 Graph 3 Predicting Fusing Time For Defined Power Input Graphs 1 to 3. Fusing: After fusing the final resistance value will be 50 times the initial value. See graph for explanation of fusing curves. Fusible Resistors: Typical Fusing Window Graph 4. lacipyTmumixaM Load: 1000 hours at 70˚C 5.02%R Shelf life: 12 months at room temperature 2.05.0%R C˚551 ta orezC˚07 ta rewop detar morf gnitareD Temperature rapid change 2.05.0%R Resistance to solder heat 2.05.0%R Performance Data Type FA8225 FA8325 FA8425 Ammopack 5000 2500 1000 Standard Quantities Per Package Type FA82* FA82/FA83 FA84 b 2 65 26 7 c5 5 1 0 Issue C · 01.07