SRF0504-402Y is a line filter designed for EMI suppression in high-frequency applications. It features an inductance of 2.8 µH (measured at 100 kHz, 0.1 V) with an impedance of 4000 ± 50% O at 100 MHz, providing effective noise attenuation across a frequency range up to 1200 MHz. The device has a maximum DC resistance of 300 mO per winding and a rated current of 200 mA, with a rated voltage of 50 Vdc and dielectric withstanding voltage of 125 Vdc. Operating over a temperature range of -40°C to +125°C, the SRF0504-402Y is constructed with a ferrite core and enameled copper wire, making it suitable for EMI filtering in communication systems, power supplies, and high-speed digital circuits where compact size and high impedance are required.