RJR26FX501R is a 1/4" multiturn cermet trimming potentiometer (Trimpot) with a 500 ohm resistance value, designed for precision adjustment applications in industrial environments. The device features sealed construction, infinite resolution, and meets MIL-PRF-39035 high-reliability specifications with a temperature coefficient of ±100 ppm/°C. It offers exceptional adjustability with voltage accuracy of ±0.02% and resistance accuracy of ±0.05%, along with an insulation resistance of 1,000 megohms minimum at 500 VDC. The potentiometer operates reliably across a temperature range of -65°C to +150°C, with a power rating of 0.25 watt at 85°C, and withstands 10,000 hours of load life testing at 0.25 watt and 85°C. Common applications include precision instrumentation, signal conditioning circuits, and military/aerospace systems where high reliability and stable performance are essential.