This part is a kind of semiconductor called R2714ZC16H.
Function of this product has Distributed Gate Thyristor.
Manufacturers : Westcode Semiconductors
Image and pinout :
Some of the text within the PDF file :
WESTCODE Date:- 11 Oct, 2001 Data Sheet Issue:- 1 Distributed Gate Thyristor Type R2714ZC16x to R2714ZC18x Absolute Maximum Ratings VDRM VDSM VRRM VRSM VOLTAGE RATINGS Repetitive peak off-state voltage, (note 1) Non-repetitive peak off-state voltage, (note 1) Repetitive peak reverse voltage, (note 1) Non-repetitive peak reverse voltage, (note 1) MAXIMUM LIMITS 1600-1800 1600-1800 1600-1800 1700-1900 UNITS V V V V IT(AV) IT(AV) IT(AV) IT(RMS) IT(d.c.) ITSM ITSM2 I2t I2t diT/dt VRGM PG(AV) PGM VGD THS Tstg OTHER RATINGS Mean on-state current, Tsink=55°C, (note 2) Mean on-state current. Tsink=85°C, (note 2) Mean on-state current. Tsink=85°C, (note 3) Nominal RMS on-state current, Tsink=25°C, (note 2) D.C. on-state current, Tsink=25°C, (note 4) Peak non-repetitive surge tp=10ms, [ ... ]