WA84F Welwyn Components Predictable fusing characteristics F

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WA84F Welwyn Components Predictable fusing characteristics F

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Fusible Wirewound Resistors
WA84F
Welwyn Components
Predictable fusing characteristics Flameproof protection Suitable pulse fuse applications
Electrical Data
WA84F Power rating 25°C Power rating 70°C Resistance range Limiting element voltage Isolation voltage (-55°C 155°C) Resistance tolerance Values Thermal impedance Ambient temperature range °C/watt watts watts ohms volts volts ppm/°C :350 :100 preferred
Physical Data
Dimensions (mm) Weight mounting centres 20.3 bend radius
Type WA84F
14.5
23.6
Wt.nom
Construction
high purity ceramic substrate assembled with interference caps which welded termination wires. resistive element wound substrate welded caps. Cement protection applied resistor body before marking with indelible ink.
Solvent Resistance
body protection marking resistant normal industrial cleaning solvents suitable printed circuits.
Terminations
Material Strength Solder-coated copper wire terminations meet requirements 68.2.21.
Marking
Resistors colour coded with five bands. Four bands used indicate value tolerance, with IEC62 colours being used. fifth yellow band denotes fusibility.
Solderability terminations meet requirements 115-1, Clause
Flammability
resistor coating will burn under condition applied temperature component overload.
General Note
Welwyn Components reserves right make changes product specification without notice liability. information subject Welwyn's data considered accurate time going print. subsidiary electronics Issue 04.03
Welwyn Components Limited Bedlington, Northumberland NE22 7AA, Telephone: 1670 822181 Facsimile: 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com
Fusible Wirewound Resistors
WA84F
Welwyn Components
Performance Data
Maximum Load rated power: 1000 70°C heat: 1000 200°C Derating from rated power 25°C Short term overload rated power seconds D.H.S.S. Climatic Pulse handling zero 275°C Data available request Typical
Fusing characteristics constant voltage Max. time fuse (seconds)
100.0 90.0 80.0 70.0 60.0 50.0 40.0 30.0 20.0 10.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0
Fusing characteristics constant current Max. time fuse (seconds)
100.0 90.0 80.0 70.0 60.0 50.0 40.0 30.0 20.0 10.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0
Multiple rated power
Multiple rated power
Packaging
Rated Power 70°C
standard method packaging taped ammo packs. provided reels request. critical dimensions shown figure Component wires will protrude beyond outside edge tapes. Alternative packaging available special request detailed table opposite. Figure
WA84F Series Derating Curve
Temp°C
Body Location
Standard Quantities Package
Type Reel Large ammo pack WA84F 1000 1000 Type WA84F
Welwyn Components Limited Bedlington, Northumberland NE22 7AA, Telephone: 1670 822181 Facsimile: 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com
Issue 04.03

WA84F Welwyn Components Predictable fusing characteristics F

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