| Wire Wound Resistors |
Print Version |
Introduction:
The WW series Wirewound Resistors are manufactured using the
best quality rwa materials, enabling us to ofer wirewoun resistors
of superior quality to cover a wide range of application in
the application in the electronics field.
The wirewound resistors are coated with SILICONE EPOXY or VITREOUS
ENAMEL with radial wire or tag lead terminations and various
ceramic encased types.
Features of WATTS Wirewound Resistors:
- Smooth, well polished ceramic cores having high di-electric
strength, high density and low porosity are used as substrates
are used for winding and encasing.
- Best Nickel-Chromium or Copper-Nickel alloys wire is used
for winding. These wires have the ability to withstand excessive
overloads under severe service conditions.
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| S
p e c i f i c a t i o n s |
TYPE
KNP |
DIMENSION |
Resistance
Range(W) |
Dielectric
Withstanding Voltage |
| D |
L |
H |
d |
| 1W |
3.20+/-0.5 |
8.80+/-0.5 |
28+/-2 |
0.6+/-0.02 |
0.1-200 |
350
V |
| 2W |
4.25+/-0.5 |
10.9+/-1.0 |
28+/-2 |
0.8+/-0.05 |
0.1-220 |
500
V |
| 3W |
4.80+/-0.5 |
15.00+/-1.0 |
28+/-2 |
0.8+/-0.05 |
0.1-220 |
500
V |
| 4W |
6.5+/-1.0 |
19+/-1.5 |
28+/-2 |
0.8+/-0.05 |
0.1-390 |
500
V |
| 6W |
8.5+/-1.0 |
24+/-1.5 |
28+/-2 |
0.8+/-0.05 |
0.1-1K |
500
V |
| 7W |
8.5+/-1.0 |
32+/-1.5 |
28+/-2 |
0.8+/-0.05 |
0.1-1.5K |
500
V |
| 8W |
8.5+/-1.0 |
41+/-1.5 |
28+/-2 |
0.8+/-0.05 |
0.1-2.2K |
500
V |
| 10W |
8.5+/-1.0 |
53+/-1.5 |
28+/-2 |
0.8+/-0.05 |
0.1-3.3K |
1000
V |
| KNP |
|
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| E
l e c t r i c a l P e r f o r m a n
c e |
| Tests |
Condition |
Spec. |
| Resistance
Temp. Coeff |
-55oC~200oC |
 300ppm/oC |
| Short
Time Overload |
10
times of rated wattage for 5 sec |
2% |
| Rated
Load |
Rated
voltage for 30 min |
0.5% |
| Insulation
Resistance |
500
V megger |
1,000M
W |
| Load
Life |
70oC
on-off cycle 1,000 hrs |
3% |
| Moisture-proof
Load life |
40oC
95% RH on-off cycle 1,000 hrs |
3% |
| Incombustibility |
16
times of rated wattage for 5 min. |
not
flamable |
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