IRF4905, IR International Rectifier, MBR, IRF4905, -55V, 200W, Id. -74A, RDS(on)=0.02Ω 
Single P-Channel HEXFET Power MOSFET, 
Advanced Process Technology, 
Ultra Low On-Resistance, 
Dynamic dv/dt Rating, 
Fast Switching,  
Case type TO-220AB-3PIN, IRF4205PBF, 
1 - GATE 
2 - DRAIN 
3 - SOURCE