RD 1/4W 75K J T/B A1 with Carbon Film Resistors Axial,2.4x6.5mm RoHS is a type of resistor manufactured by Tyohm. The RD designation refers to the product, which is a thin-film resistor. The 1/4W indicates that the resistor is rated to dissipate up to 0.25 Watts of power. The 75K specifies that the resistance is 75,000 Ohms. The J T/B A1 indicates that it has a 5% tolerance (J), that the temperature coefficient is +-100ppm/K (T/B), and the tracking current between devices is similar (A1). The Axial,2.4x6.5mm RoHS indicates that the resistor is in an axial form factor, is 2.4 millimeters in diameter and is 6.5 millimeters long, and is RoHS certified, meaning it is lead free and compliant with European environmental regulations.