The 3600BL14M100 from Johanson Technology is a Balun with Frequency 3.3 to 3.9 GHz, Amplitude Balance 1.5 dB, Phase Balance 15 Degree, Insertion Loss 1.2 dB, Power 2 W. Tags: Ceramic, Surface Mount, Unbalanced to Balanced. More details for 3600BL14M100 can be seen below.