Resistors
WIRE WOUND RESISTORS - SILICONE COATED
The WWS series wire wound resistors are manufactured using high quality resistance wires wound on ceramic substrates. The resistors are coated using layers of Flame Proof Epoxy with axial lead wire. In WWS series, resistors up to 5W, the resistance value is color coded with 3 bands plus a tolerance band. An additional black band indicates that the resistor is wire wound. For resistors 6W and above, the value is printed on the resistor.
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SPECIFICATION |
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| Type No. | Wattage | DIMENSIONS IN MM |
Range in OHMS [Ω] | Tolerance | Dielectric withstanding Voltage | ||||
| D | L | H | d | ||||||
WWS 1 WWS 2 M |
1W / 2W | 3.20 ± 1.0 | 9 ±1.0 | 26 ±2.0 | 0.55 ± 0.05 | 0.01 | 470 | 5% | 350 V |
WWS 2 WWS 3 M |
2W / 3W | 4.25 ± 1.0 | 11 ± 1.0 | 26 ±2.0 | 0.65 ± 0.05 | 0.01 | 680 | 5% | 500 V |
WWS 3 WWS 4 M |
3W / 4W | 5.00 ± 1.0 | 15.00 ± 1.0 | 26 ±2.0 | 0.75 ± 0.05 | 0.01 | 1K | 5% | 500 V |
WWS 5 WWS 6 M |
5W / 6W | 6.00± 2.0 | 18.00 ± 2.0 | 30 ±2.0 | 0.75 + 0.05 | 0.01 | 3K3 | 5% | 500 V |
WWS 6 WWS 7 M WWS 8 MM |
6W / 7W / 8W | 8.00 ±2.0 | 25 ± 2.0 | 38 ±3.0 | 0.80 ± 0.05 | 0.1 | 10K | 5% | 500 V |
WWS 9 WWS 10 M |
9W / 10W | 8.00± 2.0 | 30 + 2.0 | 38 ±3.0 | 0.80 ± 0.05 | 0.1 | 10K | 5% | 1000 V |
‘M’ under ‘Type No.’ denotes miniature size
| Tests | Condition | Spec |
|---|---|---|
| Resistance Temp. Coeff. | -55°C ~ 200°C | ±200ppm/°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% |