This part is a kind of semiconductor called NDR433.

Function of this product has SAW Resonator.

Manufacturers : NEDI

Image and pinout :

Some of the text within the PDF file :

NEDI SAW Resonator NDR433 The NDR433 is a true one-port, surface-acoustic-wave (SAW) resonator in a low-profile metal TO-39 case. It provides reliable, fundamental-mode, quartz frequency stabilization i.e. in transmitters or local oscillators operating at 433.920 MHz. 1.Package Dimension (TO-39) Pin 1 2 3 Dimension A B C D E Configuration Input / Output Output / Input Case Ground Data (unit: mm) 9.30±0.20 5.08±0.10 3.40±0.20 3±0.20 5±0.20 0.45±0.20 2.Marking 3.Equivalent LC Model and Test Circuit NDR433 Color: Black or Blue 4.Typical Application Circuits 1) Low-Power Transmitter Application 2) Local Oscillator Application http://www.net/ 5.Typical Frequency Response 6.Temperature Characteristics NANJING ELECTRONIC DEVICES INSTITUTE http://www.ndsaw.com E-mail: s [ ... ]

NDR433 PDF Datasheet Download