Heat Energy Surge Wire Wound Fusible Resistor
(WF Series)



FEATURES
:
The voltage type wire wound fusible resistor can provide reliable fusing
   behavior stable performance and endurance to surge voltage.



CHARACTERISTICS:
ITEM
REMARKS

Load life under high temperature

JIS C 5201-1(4.25.1) Rated current at 50%;70℃ for 1,000 hours

Humidity resistance

JIS C 5201-1(4.24) MIL-STD-202,Method 106,Heat(65℃ at 90%∼98%).

Vibration

JIS C 5201-1(4.22) MIL-STD-202,Method 213,Condition 1.

Thermal shock

JIS C 5201-1(4.19) MIL-STD-202,Method 107, Test Condition B.(-25℃∼85℃)

Insulation resistance

JIS C 5201-1(4.6.1.1) MIL-STD-202,Method 302(≧10KΩ at 500V)

Resistance to soldering heat

JIS C 5201-1(4.18) MIL-STD-202,Method 210,Test Condition C.(10s at 260℃).

Solderability

JIS C 5201-1(4.17) MIL-STD-202,Method 208. (5s at 245℃).>95%

Lead pull force

JIS C 5201-1(4.16) MIL-STD-202,Method 211, Test Condition A.

Temp.coeff. Of resistance

JIS C 5201-1  Room temp. + 100℃;±350 ppm/℃

 

Surge Wave Characteristics

Derating Curve Derating Curve

Surface Temperature riseat Rated Power

 

Model

Rated Power
(W)

Resistance
Range
(Ω)

Maximum
Working
Voltage

Dielectric
Withstanding
Voltage

Dimension (mm)

L

ι

WFU1/2W

1/2

0.56∼100

100V

9± 0.5

3.0± 0.5

30± 3

0.60± 0.05

Various types of forming & taping are available.

Coating color:WFU (gray)WFS (pink)

 

WFS1W

1

0.56∼100

100V

9± 0.5

3.0± 0.5

30± 3

0.60± 0.05

 

FUSE CHARACTERISTICS: Curve of Fuse

Power Rating

Opening Time

16W

10 second Minimum

18W

3 second~ 60 seconds Max

20W

2 second ~ 30seconds Max

22W

1 second ~ 15seconds Max

 

SURGE WAVE CHARACTERISTICS:

Capable of withstanding 1000 times of 10KV surge voltage produced by 0.0025μF capacitor in a discharge cycle of 1sec

ON/1sec OFF.
OPERATING TEMPERATURE

-55℃∼155℃

 

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