The 3339P-1-503LF is a four-turn cermet trimming potentiometer manufactured by Bourns, featuring a 50 kO resistance value with a unique planetary drive mechanism that enables precise wiper setting in a compact single-turn package size. This sealed industrial-grade trimmer offers a resistance tolerance of ±10% standard, adjustability of ±0.05% for voltage and ±0.1% for resistance, and an infinite resolution across its 4-turn effective travel. The device operates over a temperature range of -55°C to +150°C with a power rating of 0.5 watts at 85°C, an insulation resistance of 1,000 megohms minimum at 500 VDC, and dielectric strength of 600 VAC at sea level. The 3339P style features side-adjust capability with solderable pins, RoHS-compliant 100% tin plating (LF termination), and U.L.94V-0 flammability rating, making it ideal for precision instrumentation, signal conditioning, and industrial control applications requiring reliable long-term performance.