The RWST vitreous wirewound high power resistors are known for their excellent reliability which has developed out of the VISHAY SFERNICE experience over several decades in the field of high current applications. The new RWST model is extremely rugged and is manufactured to a very carefully monitored process using the best materials to withstand severe conditions of use encountered in electrical traction.
This handbook describes the RWST series of fixed wirewound high‑power vitreous resistors designed for severe electrical traction applications. It outlines the rugged stainless‑steel construction, non‑inductive winding options, and the range of available sizes and resistance values.
Detailed electrical, mechanical, and environmental specifications are listed, including power ratings, temperature limits, tolerance, and test conditions. Ordering information and custom‑item options are also provided.
| Power rating | 95 W to 800 W at 25 °C |
|---|---|
| Temperature limits | –55 °C to +450 °C |
| Resistance tolerance | ± 5 % |
| Resistance range | 2.7 Ω to 430 kΩ |
| Average unit weight | 225 g to 2200 g |
The RWST resistors are rated from 95 W to 800 W at 25 °C.
They can operate from –55 °C up to +450 °C.
The resistance tolerance is ± 5 %.