This part is a kind of semiconductor called VSKTF180.

Function of this product has Fast Thyristor/Diode and Thyristor/Thyristor.

Manufacturers : Vishay Siliconix

Image and pinout :

Some of the text within the PDF file :

VSK.F180..P Series Vishay High Power Products Fast Thyristor/Diode and Thyristor/Thyristor (MAGN-A-PAKTM Power Modules), 180 A FEATURES • Fast turn-off thyristor • Fast recovery diode • High surge capability • Electrically isolated baseplate • 3000 VRMS isolating voltage • Industrial standard package • Lead (Pb)-free MAGN-A-PAKTM RoHS COMPLIANT • UL E78996 approved DESCRIPTION PRODUCT SUMMARY IT(AV) 180 A These series of MAGN-A-PAKTM modules are intended for applications such as self-commutated inverters, DC choppers, electronic welders, induction heating and others where fast switching characteristics are required. MAJOR RATINGS AND CHARACTERISTICS SYMBOL IT(AV) IT(RMS) ITSM I2 t I2 √ t tq trr VDRM/VRRM TJ Range 50 Hz 60 Hz 50 Hz 60 Hz CHARACTER [ ... ]

VSKTF180 PDF Datasheet Download