This part is a kind of semiconductor called 1N4148-1.

Function of this product has Silicon Switching Diode.

Manufacturers : MA-COM

Image and pinout :

Some of the text within the PDF file :

1N914 & 1N4148-1 Silicon Switching Diode Features  Available in JAN, JANTX, and JANTXV per MIL-PRF-19500/116  Metallurgically Bonded  Hermetically Sealed  Double Plug Construction Maximum Ratings Operating & Storage Temperature: -65°C to +200°C Operating Current: 200 mA @ TA = +25°C Derating Factor: 1.14 mA/°C above TA = +25°C Surge Current A: 2.00 A, sinewave, Pw = 8.3 ms Rev. V1 Electrical Specifications @ +25°C (unless otherwise Specified) JEDEC TYPE# 1N914 VBR @ 100 A VRWM IO Volts Volts (pk) mA Vf1 IF = 10 mA Vdc 100 75 75 0.8 Vf2 IF = 50 mA Trr 1 Vdc nsec 1.2 5 IR1 @ 20 Vdc nA 25 IR2 @ 75 Vdc IR3 @ 20 Vdc TA =150°C IR4 @ 75 Vdc TA =150°C Capacitance Capacitance @0V @1.5 V A A A pF pF 0.5 35 75 4.0 2.8 1N4148-1 100 75 20 [ ... ]

1N4148-1 PDF Datasheet Download