PTN Surface-Mount Chip Resistors Vishay / Thin Film PTN Surface-Mount Chip Resistors offer a 1Ω to 3MΩ resistance range, maximum 200V working voltage, and 0.1ppm/V voltage coefficient. PTN resistors feature moisture-resistance, a non-inductive design, and are available in both 'top side' and 'wraparound' termination styles in a variety of sizes. Vishay PTN Thin Film Surface-Mount Chip Resistors incorporate self-passivated, enhanced Tantalum Nitride films, giving superior performance on power handling and resistance stability.