This part is a kind of semiconductor called RCP200B03.

Function of this product has LTCC 3dB Hybrid Coupler.

Manufacturers : RN2 Technologies

Image and pinout :

Some of the text within the PDF file :

Specification For LTCC 3dB Hybrid Coupler Model Name : RCP200B03 Customer : Title: Name : APPROVED By Date : Signature : RN2 Technologies co., Ltd. RN2 Technologies co., Ltd. 284-2, Galgot-ri, Jinwe-myeon, Pyeongtaek-si, Kyunggi-do, KOREA Phone : (+82) 31 - 376 - 5400 FAX : (+82) 31 - 376 - 9151 Issued Date : Designed : Approved : Rev.1 RCP200B03 LTCC Hybrid Coupler 2 / 15 1. Description 1-1. Part number: RCP200B03 1-2. Features - Hybrid Coupler 3dB, 90˚ - Surface mount type - Suitable for operation frequency 180~210MHz - RoHS compliance - High stability in temperature and humidity for LTCC base - Low loss for Silver(Ag) conductor - Miniature size and high power capability - Lead-free alloy solderable - Thermal expansion corresponding with common substrate 2. Electrical Specifica [ ... ]

RCP200B03 PDF Datasheet Download