The KJF-4.17/400 is an SR Passives part. It is a 4.17 mm x 400 mm RoHS compliant, high-frequency wideband impedance matching transformer. It has an operating temperature range of -40°C to 105°C and a frequency range of 50 MHz to 3 GHz. The KJF-4.17/400 is designed to provide fast, easy, and reliable matching of transistors, amplifiers, and other active elements to the network impedance of 50 ohms. The part has a low insertion loss, high isolation, and excellent return loss properties. It also offers a very low-profile design that saves space in tight applications and is ideal for applications in wireless communication systems, MMDS systems, satellite systems, CATV amplifiers, and more.