The Vishay Sfernice RSSD series offers industrial high-power vitreous tubular adjustable wirewound resistors. Designed for demanding applications, these resistors provide excellent performance in terms of power rating, overload capability, long-term stability, and resistance to thermal shock and mechanical stress. They are suitable for applications requiring low ohmic values and can be tapped using adjustable collars for flexible resistance adjustment.
| Model Size | Resistance Range | Rated Power P25 C W | Tolerance % | Approx. Average Unit Weight g | Temperature Range C | Climatic Category |
| RSSD 8 x 34 | 0.12 to 10 | 16 | 5, 10, 20 | 10 | -55 to +450 | -55 C / +200 C / 56 days |
| RSSD 10 x 50 | 0.12 to 22 | 25 | 5, 10, 20 | 22 | -55 to +450 | -55 C / +200 C / 56 days |
| RSSD 13 x 70 | 0.12 to 43 | 42 | 5, 10, 20 | 38 | -55 to +450 | -55 C / +200 C / 56 days |
| RSSD 16 x 94 | 0.33 to 75 | 70 | 5, 10, 20 | 55 | -55 to +450 | -55 C / +200 C / 56 days |
| RSSD 20 x 117 | 0.22 to 100 | 100 | 5, 10, 20 | 80 | -55 to +450 | -55 C / +200 C / 56 days |
| RSSD 25 x 138 | 0.10 to 150 | 140 | 5, 10, 20 | 90 | -55 to +450 | -55 C / +200 C / 56 days |
| RSSD 25 x 168 | 0.12 to 220 | 200 | 5, 10, 20 | 115 | -55 to +450 | -55 C / +200 C / 56 days |
| RSSD 30 x 250 | 0.22 to 360 | 280 | 5, 10, 20 | 240 | -55 to +450 | -55 C / +200 C / 56 days |
| RSSD 40 x 370 | 0.47 to 470 | 450 | 5, 10, 20 | 845 | -55 to +450 | -55 C / +200 C / 56 days |
| RSSD 50 x 373 | 0.68 to 560 | 600 | 5, 10, 20 | 1270 | -55 to +450 | -55 C / +200 C / 56 days |