This part is a kind of semiconductor called M1J43.
Function of this product has SM1J43.
Manufacturers : Toshiba Semiconductor
Image and pinout :
Some of the text within the PDF file :
SM1G43,SM1J43 TOSHIBA BI−DIRECTIONAL TRIODE THYRISTOR SILICON PLANAR TYPE SM1G43,SM1J43 AC POWER CONTROL APPLICATIONS l Repetitive Peak Off−State Voltage : VDRM = 400, 600V l R.M.S On−State Current l Higt Commutating (dv / dt) : IT (RMS) = 1A Unit: mm MAXIMUM RATINGS CHARACTERISTIC Repetitive Peak Off−State Voltage SM1G43 SM1J43 SYMBOL VDRM IT (RMS) ITSM I t PGM PG (AV) VGM IGM Tj Tstg 2 RATING 400 600 1.0 8 (50Hz) 8.8 (60Hz) 0.32 1 0.1 6 0.5 −40~125 −40~125 UNIT V A A A s W W V A °C °C 2 R.M.S On−State Current (Full Sine Waveform Tc = 74°C) Peak One Cycle Surge On−State Current (Non-Repetitive) I t Limit Value Peak Gate Power Dissipation Average Gate Power Dissipation Peak Gate Voltage Peak Gate Current Junction Temperature Storage Temperature [ ... ]