The 81 3012B from Smiths Interconnect is a Resistor with Resistance 3 to 200 Ohms, Power Rating 8 W, Tolerance ±5%. Tags: Surface Mount, Chip, 3 to 200 Ohms, 5 to 150 Ohms, 15 W, Tab & Cover Thin Film RF Resistor. More details for 81 3012B can be seen below.