This is one of the semiconductor types.
This part name is DG3C3020CL, DG3C302.
This product has 330V, 45A, IGBT,
This functions is Ultra-Fast Power Transistor .
The pacakge is TO-220C-G2.
The manufacturer of the product is Panasonic.
Image: 
Description
This is IGBT. ( Vces=330V, Ic=45A, Icp=250A )
The IGBT is insulated-gate bipolar transistor.
(1) DG3C301 (DG3C3010CL) marking DG301.
(2) DG3C302 (DG3C3020CL) marking DG302.
Some of the text files within the PDF file :
PDP Panel Control Unit :
IGBTs for driving PDPs that respond to the high-speed switching characteristics and low loss characteristics demands that accompany reduced power consumption and higher video quality.
Points on Appeal ( Features )
• Can control high currents.
• Heat generation during circuit operation is minimized through high-speed switching and low VCE(sat) characteristics
DG3C3020CL Datasheet PDF
