?The Viking AR05BTCW3R90 is a high precision, low temperature coefficient (TCR) surface-mount resistor with a value of 3.9 ohms, a tolerance of ±0.1%, and a power rating of 1/8 Watt. It is constructed with a 0805 package and is RoHS compliant, meaning it meets the standards for the Restriction of Hazardous Substances set by the European Union. It is widely used in consumer electronics, automotive, and industrial applications.