The 0433BM15A0001 from Johanson Technology is a Balun with Frequency 430 to 435 MHz, Phase Balance 10 Degree, Insertion Loss 1.9dB, Power 1 W, Return Loss 9.5 dB. Tags: Ceramic, Surface Mount, Unbalanced to Balanced. More details for 0433BM15A0001 can be seen below.