TT Electronics Rotary Potentiometers, Rheostats P270-DS22BR200

The 27mm Rotary Panel Potentiometer from TT Electronics/BI Technologies, specifically the model P270/P271/P272/P278, is designed for heavy-duty applications with a long operational life of up to 1,000,000 cycles. It features a conductive plastic element and is available in various configurations, including single gang, dual gang, and options with center taps. The resistance range spans from 200 ohms to 1 megohm, with a standard tolerance of ±10% for higher resistances and ±20% for lower values. This potentiometer operates effectively within a temperature range of -55°C to +120°C and has an IP rating of IP50 for dust-proof and IP64 for sealed versions. It can handle a maximum input voltage of 500 Vdc and a rated power of 2.0 watts at 70°C for specific tapers. The device also meets MIL-PRF-94 requirements, making it suitable for applications such as machine controls and welding equipment. Engineers should consider this potentiometer for projects requiring durability and reliability in demanding environments.