This part is a kind of semiconductor called FST10020.

Function of this product has (FST10020 - FST100100) SCHOTTKY DIODES MODULE TYPE 100A.

Manufacturers : TRANSYS

Image and pinout :

Some of the text within the PDF file :

Transys Electronics L I M I T E D FST10020 THRU FST100100 SCHOTTKY DIODES MODULE TYPE 100A Features High Surge Capability Types Up to 100V VRRM 100Amp Rectifier 20-100 Volts POWER MOD TO-249AB A N Maximum Ratings Operating Temperature: -40 C to +125 Storage Temperature: -40 C to +175 Part Number Maximum Recurrent Peak Reverse Voltage 20V 30V 35V 40V 45V 60V 80V 100V Maximum DC Blocking Voltage 20V 30V 35V 40V 45V 60V 80V 100V C E 1 2 3 Maximum RMS Voltage 14V 21V 25V 28V 32V 42V 56V 70V FST10020 FST10030 FST10035 FST10040 FST10045 FST10060 FST10080 FST100100 L M B R Q D F P G J K H Electrical Characteristics @ 25 Average Forward (Per Pkg) Current Peak Forward Surge (Per leg) Current Maximum (Per leg) Instantaneous NOTE (1) Forward Voltage NOTE (1) Maximum Instantaneous Rever [ ... ]

FST10020 PDF Datasheet Download