Resistors
WIRE WOUND RESISTORS - NON INDUCTIVE
The WWN series wire wound resistors - non inductive have very low inductance (less than 1µH), high heat dissipation and low TCR. The resistors are coated using layers of Flame Proof Epoxy with axial lead wire. In WWN series, resistors up to 5W, the resistance value is color coded with 3 bands plus a tolerance band. An additional yellow band indicates that the resistor is Non Inductive. For resistors 6W and above, the value is printed on the resistor.

SPECIFICATION

Type Wattage

DIMENSIONS IN MM

Range in OHMS [Ω] Tolerance Dielectric withstanding Voltage
D L H d

WWN 1

1 3.20 ±0.5 9 ±0.5 27 ±1.0 0.60 ± 0.02 0.1 60 5% 350 V

WWN 2

2 4.25 ± 0.5 11 ± 1.0 27 ± 1.0 0.65 ± 0.02 0.1 60 5% 500 V

WWN 3/ WWN 4

3/4 5 ±0.5 15 ± 1.0 27 ±1.0 0.75 ± 0.05 0.1 220 5% 500 V

WWN 5

5 6 ± 0.5 18 ± 1.0 30 ± 1.0 0.75 ± 0.05 0.1 600 5% 500 V

WWN 6/ WWN 7/ WWN 8

6/7/8 8 + 1.0 25.00 ± 1.0 38 ±3.0 0.80 ± 0.05 0.1 1K 5% 500 V

WWN 9 / WWN 10

9/10 8± 1.0 30 ± 1.0 38 ±3.0 0.80 + 0.05 0.1 1 K 5% 1000 V

Tests

Condition Spec

Resistance Temp. Coeff.

-55°C ~ 200°C ± 200 ppm/°C

Short Time Overload

5 times of rated wattag e for 5 sec for upto 3w

10 times of rated wattage for 5 sec. above 3w

±2%

Rated Load

Rated voltage for 30 min. ± 0.5%

Insulation Resistance

500 V megger 1,000MΩ

Load Life

70°C on-off cycle 1,000hrs. ±3%
E 24 Series
10 11 12 13 15 16 18 20 22 24 27 30
33 36 39 43 47 51 56 62 68 75 82 91
Colour lst figure 2nd figure Multiplier Tolerance
Black 0 0 1
Brown 1 1 10 ± 1%
Red 2 2 100 ± 2%
Orange 3 3 1,000
Yellow 4 4 10,000
Green 5 5 100,000 ± 0.5%
Blue 6 6 1,000,000 ± 0.25%
Violet 7 7 10,000,000 ± 0.1%
Gray 8 8
White 9 9
Gold 0.1 ± 5%
Silver 0.01 ± 10%