Resistors
METAL FILM MELF RESISTORS
The WMF MELF series Metal Film MELF Resistors are manufactured using the latest Magnetron Vacuum Sputtering System. This ensures a very stable resistive medium having a very low temperature coefficient. The resistors are insulated with layers of lacquer. The WMF MELF series resistors are suitable for surface mount technologies.
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TECHNICAL SPECIFICATIONS |
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| Size | Power Rating at 70°C(W) | Ambient Temperature (°C) |
Max Working Voltage (V) | Max Overload Voltage (V) | TCR (PPM/ °C) | Resistance Range (Ω) | |||
| Tolerances: 1% 2% 5% | |||||||||
|---|---|---|---|---|---|---|---|---|---|
0102 |
0.125W |
-55 ~ +155 |
150 |
300 |
±100; ±50; ±25 |
0.22 ~ 2M2 |
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0204 |
0.125W |
-55 ~ +155 |
200 |
400 |
0.1 ~ 2M2 |
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0 .25W | |||||||||
0207 |
0.25W |
-55 ~ +155 |
250 |
500 |
0.1 ~ 10M |
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0 .5W | |||||||||
0309 |
0.5W |
-55 ~ +155 |
350 |
700 |
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| Type | Dimensions(mm) | |||
| L | D Max | D1 | K Min | |
|---|---|---|---|---|
102 |
2.0±0.1 |
1.35 |
1.25 ±0.05 |
0.3 |
204 |
3.5±0.2 |
1.55 |
1.4±0.1 |
0.5 |
207 |
5.9 ± 0.2 |
2.4 |
2.2 ± 0.1 |
1 |
309 |
8.5 ± 0.2 |
3.4 |
3.2 ± 0.2 |
1 |
CHARACTERISTICS |
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Terminal Strength |
no damage Δ R max. ± 0.5% |
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Resistance to soldering heat (350ºC) |
Δ R max. ± 1% | |||||
Solderability |
good tinning no damage |
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Temperature Cycling |
Δ R max. ± 0.25% | |||||
Life 1000 hours at Rated Power |
Δ R max. ± 1% | |||||
Short time overload |
Δ R max. ± 0.5% | |||||
Resistance to solvents |
no damage | |||||
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 |