IRC WIN Series Thin Film SMD Resistors IRC WIN (Water Insoluble Nitride) Series Thin Film SMD Resistors feature anti-sulfur terminations, precision ±0.5% tolerance, and ±25ppm/°C TCR. The inherent moisture protection of the WIN series is superior to that of passivated nichrome chip resistors. The chips come with wrap-around terminations that are ideal for soldering. The terminations have an electroplated nickel barrier and 100% matt tin finish. The body protection is resistant to all normal cleaning solvents suitable for printed circuits. All IRC WIN Series Resistors comply with EU Directive 2011/65/EU RoHS 2.0 and are Pb free.