This part is a kind of semiconductor called 2N5433.

Function of this product has N-Channel Silicon Junction Field-Effect Transistor.

Manufacturers : InterFET

Image and pinout :

Some of the text within the PDF file :

8/2014 2N5432, 2N5433, 2N5494 N-Channel Silicon Junction Field-Effect Transistor ∙ Low rDS(on) ∙ Excellent Switching ∙ Low Cutoff Current Absolute maximum ratings at TA = 25oC Reverse Gate Source & Gate Drain Voltage -25V Continuous Forward Gate Current 100 mA Continuous Device Power Dissipation 300 mW Power Derating 2.3 mW/oC Storage Temperature Range -65oC to +150oC At 25oC free air temperature Static Electrical Characteristics Gate Source Breakdown Voltage V(BR)GSS Gate Reverse Current IGSS Gate Source Cutoff Voltage VGS(OFF) Drain Saturation Current (pulsed) IDSS Dynamic Electrical Characteristics Drain -Source On Resistance rds(on) Common-Source Input Capacitance Ciss Common-Source Reverse Transfer Capacitance Turn-On Delay Time Crss td Rise Time Tu [ ... ]

2N5433 PDF Datasheet Download