WR02W3904FAL is a Thick Film Resistors - SMD 0201 3M90 1% Lead Free manufactured by Walsin. It is a miniature surface mount resistor and is suitable for use in, but not limited to, portable devices, automotive electronics, 3G and 4G cellular base station applications, and consumer appliances. It features thick film resistive elements for a high accuracy of 0.1 to 1.0%, a low TCR of 0.5 to 100ppm/°C, and an extended operating temperature range of -55° to +155°C. It also features a compact, low profile design for effective board space utilization, and is available in standard and custom versions. The device is formulated lead free and is RoHS and WEEE compliant.