RMCF0402JT680R is a surface-mount, four-terminal resistor from Stackpole, a manufacturer of resistors, potentiometers, trimmers, rheostats, sensors, and thermal protection devices. The RMCF0402JT680R is a thick-film resistor, with 0402 (1005 Mil) chip size, a resistance of 680 Ohms, and a tolerance of ±5%. Its rated power is 0.05 W and its temperature coefficient is ±50ppm/°C.