The S5D4453 from Synergy Microwave Corporation is a Power Divider with Frequency DC to 4.4 GHz, Insertion Loss 0.5 to 1 dB, Isolation 15 to 20 dB, Input Power 2 W, Amplitude Balance ± 0.1 to 0.3 dB. Tags: Surface Mount. More details for S5D4453 can be seen below.