This part is a kind of semiconductor called TT500N16KOF.

Function of this product has Thyristor SCR.

Manufacturers : Eupec Power Semiconductors

Image and pinout :

Some of the text within the PDF file :

N Netz-Thyristor-Modul Phase Control Thyristor Module Datenblatt / Data sheet TT500N TT500N Kenndaten TT500N...-A TD500N TD500N...-A DT500N Elektrische Eigenschaften / Electrical properties Höchstzulässige Werte / Maximum rated values Periodische Vorwärts- und Rückwärts-Spitzensperrspannung Tvj = -40°C... Tvj max repetitive peak forward off-state and reverse voltages Vorwärts-Stoßspitzensperrspannung non-repetitive peak forward off-state voltage Rückwärts-Stoßspitzensperrspannung non-repetitive peak reverse voltage Durchlaßstrom-Grenzeffektivwert maximum RMS on-state current Dauergrenzstrom average on-state current Stoßstrom-Grenzwert surge current Grenzlastintegral I²t-value Kritische Stromsteilheit critical rate of rise of on-state current Kritische Sp [ ... ]

TT500N16KOF PDF Datasheet Download