The PTV09A-4020F-B203 is a 9 mm carbon element potentiometer from the PTV09 series. It provides a total resistance of 20 kOhms with a linear 'B' taper and a standard resistance tolerance of ±20%. This model is configured with a horizontal, rear-mount, bushingless terminal layout and features a 20 mm flat insulated shaft with no detent. It has a power rating of 0.05 watts, a maximum operating voltage of 20 VDC / 50 VAC, and a rotational life of 10,000 cycles. This potentiometer is suitable for a variety of applications including portable electronics, audio amplifiers, mixers, and commercial appliances.