This part is a kind of semiconductor called IRCZ34.

Function of this product has Power MOSFET(Vdss=60V/ Rds(on)=0.050ohm/ Id=30A).

Manufacturers : International Rectifier

Image and pinout :

Some of the text within the PDF file :

PD - 9.590A IRCZ34 HEXFET® Power MOSFET l l l l l l Dynamic dv/dt Rating Current Sense 175°C Operating Temperature Fast Switching Ease of Paralleling Simple Drive Requirements VDSS = 60V RDS(on) = 0.050Ω ID = 30A Description Third Generation HEXFETs from International Rectifier provide the designer with the best combination of fast switching, ruggedized device, low on-resistance and cost-effectiveness. The HEXSence device provides an accurate fraction of the drain current through the additional two leads to be used for control or protection of the device. These devices exhibit similar electrical and thermal characteristics as their IRF-series equivalent part numbers. The provision of a kelvin source connection effectively eliminates problems of common source inductance when the HEX [ ... ]

IRCZ34 PDF Datasheet Download