This part is a kind of semiconductor called MDS100.

Function of this product has Three Phase Bridge Rectifier.

Manufacturers : Naina Semiconductor

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Some of the text within the PDF file :

Naina Semiconductor Ltd. MDS100 Three Phase Bridge Rectifier, 100 Amps Features • Easy connections • Excellent power volume ratio • Insulated type Voltage Ratings (TJ = 25oC unless otherwise noted) Type number Voltage code VRRM, Max. repetitive peak reverse voltage VRSM, Max. nonrepetitive peak reverse voltage MDS100 80 100 120 140 160 (V) 800 1000 1200 1400 1600 (V) 900 1100 1300 1500 1700 IRRM max @ TJ max (mA) 10 MDS Electrical Specifications (TJ = 25oC unless otherwise noted) Parameters Conditions Maximum DC output current TC = 85oC Forward surge current (non-repetitive), one cycle f = 50 Hz Fusing current Maximum forward voltage drop IFM = 100A, TJ = 25 oC RMS isolation voltage Symbol IDC IFSM I2t VFM VISO Values 100 1150 6600 1.3 3000 Units A A A2s V V [ ... ]

MDS100 PDF Datasheet Download