The 2450BL14C200 from Johanson Technology is a Balun with Frequency 2.4 to 2.5 GHz, Amplitude Balance 2 dB, Phase Balance 10 Degree, Insertion Loss 1.3 dB, Power 0.5 W. Tags: Ceramic, Surface Mount, Unbalanced to Balanced. More details for 2450BL14C200 can be seen below.