The 81 3011A from Smiths Interconnect is a Resistor with Resistance 12 to 400 Ohms, Power Rating 800 W, Tolerance ±5%. Tags: Surface Mount, Chip, 12 to 400 Ohms, 10 to 400 Ohms, 500 W, Tab & Cover Thin Film RF Resistor. More details for 81 3011A can be seen below.