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Fast Fusible Metal Film Resistors
WFF Series
Welwyn Components
• • •
Low power fusing Predictable fusing characteristics Flameproof protection
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Electrical Data
WFF1/4 Power rating at 70˚ C Resistance range Limiting element voltage TCR Resistance tolerance Standard values Thermal impedance Ambient temperature range ˚ C/watt ˚C 150 watts ohms volts ppm/˚ C % 0.25 0R1 - 10K 250 WFF1/2 0.5 0R10 - 27K 350 250 5 E24 preferred 120 -55 to 155 100 WFF1 1 0R2 - 1K5 350
Physical Data
Dimensions (mm) & Weight (g) Type L max 6.2 9.0 12.5 D max 2.3 2.5 3.4 4.2 f min 21.0 19.6 17.8 d nom 0.6 0.8 0.8 PCB mounting centres 10.2 12.7 18.4 Min. bend radius 0.6 1.2 1.2 Wt. nom 0.3 0.6 0.
WFF Datasheet
