RD 1/4W 820K J T/B A1 with Carbon Film Resistors Axial,2.4x6.5mm RoHS, manufactured by Tyohm is an electronic part used primarily in circuit board designs. It is a resistor with a resistive value of 820K ohms (kiloohms). The "1/4W" denotes the power rating of the part, which has a tolerance of +-5%, and is rated at a power dissipation of 0.25 Watts. The resistor is formed from carbon film, and has an axial size of 2.4x6.5mm. Additionally, the resistor is built to RoHS (Restriction of Hazardous Substances) standards set by the European Union. Finally, this resistor is manufactured by Tyohm, a trusted supplier of components to the electronics industry.