25121WF010JT4E is a quarter watt, 5% tolerance, metal film resistor manufactured by Royal Ohm, a company established in 1952 in Japan. This part is designed to work with a wide range of operating temperatures, and can handle up to 250V. The 25121WF010JT4E features a very low tolerance level, making it suitable for use in critical applications where accuracy is important. Its construction is robust and reliable, with a lead-free solderability that ensures a secure and permanent connection. The 25121WF010JT4E is widely used in industrial applications due to its superior quality, reliability and affordability.