This part is a kind of semiconductor called 2N6239.

Function of this product has SILICON CONTROLLED RECTIFIERS.

Manufacturers : Electronix

Image and pinout :

Some of the text within the PDF file :

2N6236-2N6241 SILICON CONTROLLED RECTIFIERS Available Non-RoHS (standard) or RoHS compliant (add PBF suffix). Available as “HR” (high reliability) screened per MIL-PRF-19500, JANTX level. Add “HR” suffix to base part number. MAXIMUM RATINGS (TC = 110°C unless otherwise noted) Rating Symbol Value Unit Repetitive peak forward and reverse blocking voltage (1) (1/2 sine wave, RGK = 1000Ω, TC = -40 to +110°C) 2N6236 2N6237 2N6238 2N6239 2N6240 2N6241 VDRM VRRM 30 50 100 200 400 600 Volts Non-repetitive peak reverse blocking voltage (1/2 sine wave, RGK = 1000Ω, TC = -40 to +110°C) 2N6236 2N6237 2N6238 2N6239 2N6240 2N6241 VRSM 50 100 150 250 450 650 Volts Average on-state current (TC = -40 to +90°C) (TC = 100°C) IT(AV) 2.6 1.6 Amps Surge on-state current (1/2 [ ... ]

2N6239 PDF Datasheet Download