The 81 3036 from Smiths Interconnect is a Resistor with Resistance 10 to 400 Ohms, Power Rating 50 W, Tolerance ±5%. Tags: Surface Mount, Chip, 10 to 400 Ohms, 10 to 250 Ohms, 200 W, Tab & Cover Thin Film RF Resistor. More details for 81 3036 can be seen below.