This part is a kind of semiconductor called 2N3822.

Function of this product has TECHNICAL DATA.

Manufacturers : Microsemi Corporation

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Some of the text within the PDF file :

TECHNICAL DATA N-CHANNEL J-FET DEPLETION MODE Qualified per MIL-PRF-19500/375 Devices 2N3821 2N3822 2N3823 Qualified Level JANTX JANTXV MAXIMUM RATINGS Parameters / Test Conditions Gate-Source Voltage Drain-Source Voltage Drain-Gate Voltage Gate Current Power Dissipation TA = +250C (1) Operating Junction & Storage Temperature Range Symbol VGSR VDS VDG IGF PT Tj, Tstg 2N3821 2N3822 50 50 50 2N3823 30 30 30 Unit V V V mA mW 0 C 10 300 -55 to +200 TO-72* (TO-206AF) *See appendix A for package outline (1) Derate linearly 1.7 mW/0C for TA +25 0 C. ELECTRICAL CHARACTERISTICS (TA = 250C unless otherwise noted) Parameters / Test Conditions Symbol Gate-Source Breakdown Voltage VDS = 0, IG = 1.0 µAdc Gate Reverse Current VDS = 0, VGS = 30 Vdc VDS = 0, VGS = 20 Vdc Zero-Gate-Voltage Drain [ ... ]

2N3822 PDF Datasheet Download