The 81 3003B 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, 3 to 250 Ohms, 20 W, Tab & Cover Thin Film RF Resistor. More details for 81 3003B can be seen below.