This document describes the RT230 wirewound rheostat/potentiometer from Vishay Sfernice, featuring 250 watts power, an ohmic range of 1 ohm to 22 kilohms, and a standard linear variation law.
The RT230 series wirewound potentiometers and rheostats from Vishay are designed for high‑power applications up to 250 W. The handbook details the mechanical construction, environmental limits, and electrical performance of the devices, including travel angle, torque, and resistance options. Key specifications such as a 300° ± 5° travel, operating torque of 1‑50 N·cm, temperature range from –55 °C to +320 °C, and resistance values from 1 Ω to 22 kΩ are listed. Optional features like spindle locking devices and custom winding options are also described, along with ordering references and legal disclaimer. This manual is written in Chinese.
| Power Rating | 250 W at 25 °C |
|---|---|
| Mechanical Travel | 300° ± 5° |
| Operating Torque | 1‑50 N·cm |
| Temperature Range | –55 °C to +320 °C |
| Resistance Range | 1 Ω to 22 kΩ |
| Tolerance | ± 10 % |
| Limiting Element Voltage | 1500 V |
The RT230 is rated for 250 W at 25 °C.
It can operate from –55 °C up to +320 °C.
The device provides a travel of 300° ± 5°.