The ARN12 from Viking Tech America is a Resistor with Resistance 100 Ohms to 30.1 kOhms, Power Rating 6 W, Temperature Coefficient (TCR) ±25 ppm/Degree C, ±50 ppm/Degree C, Tolerance ±0.1%, ±0.25%, ±0.5%, ±1%, Voltage Rating 100 V. Tags: Surface Mount, Chip. More details for ARN12 can be seen below.