saludos litobarboza
tu transistor es un igbt es decir es un elemento de potencia
typo 1hw15n120r3,,Vce ..1200 volts...Ic 15 amperes ,,,Vce1.48volts,,, temp max 175 oC,,,marking h15r1203,,,package pg-to247-3
http://www.datasheet4u.com/datasheet/H/1/5/H15R1203_InfineonTechnologies.pdf.html
file:///C:/Users/titan/Downloads/datasheet.pdf
suerte