The MM52F3R90TKRTR2K0 is a metal film resistor manufactured by Firstohm, which is Surface-Mounted Device (SMD) compliant and RoHS certified. It is 3.9 Ohms ±1% and rated for 1/2 watt power. It has a TH (Through Hole) type terminal configuration, meaning it is designed to be soldered directly onto a PCB. Its size and variety of packaging options make it a popular choice for a wide range of applications. The resistor features excellent temperature and temperature coefficient performance, and is known for its durability and reliability.