This part is a kind of semiconductor called BAT14-013.

Function of this product has HiRel Silicon Schottky Diode (HiRel Discrete and Microwave Semiconductor Medium barrier diodes for detector and mixer applications).

Manufacturers : Siemens Semiconductor Group

Image and pinout :

Some of the text within the PDF file :

HiRel Silicon Schottky Diode Features ¥ HiRel Discrete and Microwave Semiconductor ¥ Medium barrier diodes for detector and mixer applications ¥ Hermetically sealed microwave package ¥ qualified ¥ ESA/SCC Detail Spec. No.: 5106/014 ESD: Electrostatic discharge sensitive device, observe handling precautions! T BAT 14 T1 Type BAT 14-013 (ql) Marking Ordering Code see below Pin Configuration Package T BAT 14-014 (ql) BAT 14-033 (ql) BAT 14-034 (ql) BAT 14-043 (ql) BAT 14-044 (ql) BAT 14-063 (ql) BAT 14-064 (ql) BAT 14-073 (ql) BAT 14-074 (ql) BAT 14-093 (ql) BAT 14-094 (ql) BAT 14-103 (ql) BAT 14-104 (ql) BAT 14-113 (ql) BAT 14-114 (ql) BAT 14-123 (ql) BAT 14-124 (ql) (ql) Quality Level: - see below see below see below see below see below see below see below see below see below see [ ... ]

BAT14-013 PDF Datasheet Download