The RC0402FR-07221RL is a 0402 (1005 metric) thick-film, moisture-resistant chip resistor, manufactured by Yageo. This resistor has a resistance of 221 Ohms ± 1% and a power rating of 0.063 Watts (1/16 Watt) – it is suitable for a wide variety of applications, including computer and telecommunications equipment, consumer electronics, and automotive applications. Its construction involves printing thick film resistive and conductive elements on a high-temperature, ceramic substrate, before forming the necessary leads and plating them with gold or silver. The resistor is also provided with an epoxy coating for moisture resistance, to ensure reliable operation in humid environments.