This part is a kind of semiconductor called 1N4454.

Function of this product has SMALL SIGNAL SWITCHING DIODE.

Manufacturers : CHENYI ELECTRONICS

Image and pinout :

Some of the text within the PDF file :

CE CHENYI ELECTRONICS FEATURES . Silicon epitaxial planar diode . Fast swithching diodes . 1N4149, 1N4447, 1N4449 are also avaible in glass case DO-34 MECHANICAL DATA . Case: DO-35 glass case . Polarity: Color brand denotes cathode end . Weight: Approx. 0.13gram 1N914 THRU 1N4454 SMALL SIGNAL SWITCHING DIODE Dimensions in inches and (millimeters) MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Type 1N914 1N41491) 1N4150 1N4152 1N4153 1N4154 1N44471) 1N44491) 1N4450 1N4451 1N4453 1N4454 Peak Max. Max. Max. reverse Aver. Power Junction voltage Rectified Dissip temperaVRM(V) Current At 25 ture I(AV)Ma Ptot(mW) TJ Max. Forward Voltage drop VF at IF (V) (mA) Max. Reverse Current Max. Reverse Recovery Time IR at trr(ns) (nA) VR(V) Max. Test conditions 100 75 500 200 1.0 10 25 20 4.0 IF= [ ... ]

1N4454 PDF Datasheet Download