This part is a kind of semiconductor called B3884.

Function of this product has SAW Components.

Manufacturers : EPCOS

Image and pinout :

Some of the text within the PDF file :

SAW Components Data Sheet B3884 SAW Components Low-Loss Filter Data Sheet B3884 439,25 MHz Ceramic package QCC12C Features q Low-loss filter q Temperature stable q Ceramic SMD package 2,54 2,54 1,0 1 2 3 000 11 111 00 11 00 000 111 00 11 000 11 00 00 11 00 00 11 111 111 000 11 000 00 11 00 11 000 111 111 00 11 000 111 000 111 00 11 000 000 111 111 00 11 12 11 1,4 4 bottom view Terminals q Gold-plated 1,48 111 000 00 11 000 111 00 11 000 111 00 11 000 000 111 00 111 11 00 11 00 11 000 111 11 00 00 11 000 111 00 11 11 00 000 11 111 00 11 00 9 8 7 10 0,6 111 00 000 11 00 00 11 11 00 11 000 11 111 000 111 11 111 00 000 00 00 11 00 11 000 11 111 00 00 11 6 5 side view 5,0 top view 7,0 Dimensions in mm, approx. weight 0,2 g Pin configuration 10 12 4 6 3, 9 1, [ ... ]

B3884 PDF Datasheet Download