This part is a kind of semiconductor called NDR550.

Function of this product has SAW Resonator.

Manufacturers : NEDI

Image and pinout :

Some of the text within the PDF file :

The NDR550 is a true one-port, surface-acoustic-wave ( SAW) resonator in a surfacemount ceramic QCC8C case. It provides reliable, fundamental-mode, quartz frequency stabilization i.e. in transmitters or local oscillators operating at 433.920 MHz. 1. Package Dimension (QCC8C) www.DataSheet.co.kr 2. Marking 3. Equivalent LC Model and Test Circuit NDR550 Laser Marking 4. Typical Application Circuits 1) Low-Power Transmitter Application 2) Local Oscillator Application 5. Typical Frequency Response 6. Temperature Characteristics Datasheet pdf - http://www.net/ www.DataSheet.co.kr Datasheet pdf - http://www.net/ 7. Performance 7-1. Maximum Ratings Rating CW RF Power Dissipation DC Voltage Between Terminals Storage Temperature Range Operating Temperature Range P [ ... ]

NDR550 PDF Datasheet Download