The 81 3012TC from Smiths Interconnect is a Resistor with Resistance 3 to 250 Ohms, Power Rating 20 W, Tolerance ±5%. Tags: Tab & Cover, 3 to 250 Ohms, 10 to 250 Ohms, 20 W, Flanged Thin Film RF Resistor. More details for 81 3012TC can be seen below.