The Firstohm MM52F3K90TKRTR2K0 is a metal film resistor with a resistance value of 3.9 kilo-ohms (3.9 k?) and a tolerance rating of ± 1%. It has a power rating of 1/2 watt and is Surface Mount Device (SMD) compatible. Additionally, it is compliant with the European Union's Restriction of Hazardous Substances directive (RoHS), meaning it is free of lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, and polybrominated diphenyl ethers. This resistor is suitable for use in a variety of applications such as precision instrumentation, automotive systems, and TVs.