The 81 3003A from Smiths Interconnect is a Resistor with Resistance 5 to 120 Ohms, Power Rating 50 W, Tolerance ±5%. Tags: Surface Mount, Chip, 5 to 120 Ohms, 10 to 350 Ohms, 250 W, Tab & Cover Thin Film RF Resistor. More details for 81 3003A can be seen below.