Resistors
WIRE WOUND MELF RESISTORS
The WWS MELF 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. The WWS MELF series resistors are suitable for surface mount
technologies.
MPN
×
SPECIFICATION |
|||||||||
| Size | Power Rating at 70°C | DIMENSIONS IN MM |
Ambient Temperature(°C) | Insulation Voltage(v) | Resistance Range (Ω) | ||||
| L | D | B | Tolerances: 1% 2% 5% | ||||||
|---|---|---|---|---|---|---|---|---|---|
0207 |
0.25W 0.5WS 1WSS |
5.90 ± 0.5 | 2.20 ± 0.2 | 1.0 Min. | -55 ~ 155 | 250 | 0.22~100 | ||
0309 |
0.5W 1WS 2WSS 3WSSS |
8.50 ± 0.5 | 3.0 ± 0.2 | 1.3 Min. | -55 ~ 155 | 350 | 0.22~300 | ||
| Tests | Condition | Spec |
|---|---|---|
| Resistance Temp. CoeV. | -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% |
| 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 |
E 96 Series
| 100 | 102 | 105 | 107 | 110 | 113 | 115 | 118 | 121 | 124 | 127 | 130 | 133 | 137 | 140 | 143 |
| 147 | 150 | 154 | 158 | 162 | 165 | 169 | 174 | 178 | 182 | 187 | 191 | 196 | 200 | 205 | 210 |
| 215 | 221 | 226 | 232 | 237 | 243 | 249 | 255 | 261 | 267 | 274 | 280 | 287 | 294 | 301 | 309 |
| 316 | 324 | 332 | 340 | 348 | 357 | 365 | 374 | 383 | 392 | 402 | 412 | 422 | 432 | 442 | 453 |
| 464 | 475 | 487 | 499 | 511 | 523 | 536 | 549 | 562 | 576 | 590 | 604 | 619 | 634 | 649 | 665 |
| 681 | 698 | 715 | 732 | 750 | 768 | 787 | 806 | 825 | 845 | 866 | 887 | 909 | 931 | 953 | 976 |
| 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% |
Electronic Products
Ohm's Law Calculator
Enter any two known values and press "Calculate" to solve for the others.
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Watts (W)
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Voltage (V) = Current (I) * Resistance (R)
Power (P) = Voltage (V) * Current (I)
