This part is a kind of semiconductor called 05N03L.

Function of this product has IPB05N03L.

Manufacturers : Infineon Technologies

Image and pinout :

Some of the text within the PDF file :

OptiMOS® Buck converter series Feature • N-Channel • Logic Level • Very low on-resistance RDS(on) • Excellent Gate Charge x RDS(on) product (FOM) • Superior thermal resistance • 175°C operating temperature • Avalanche rated • dv/dt rated • Ideal for fast switching buck converters IPP05N03L IPB05N03L Product Summary VDS 30 V RDS(on) max. SMD version 4.9 mΩ ID 80 A P- TO263 -3-2 P- TO220 -3-1 Type IPP05N03L IPB05N03L Package Ordering Code P- TO220 -3-1 Q67042-S4038 P- TO263 -3-2 Q67040-S4343 Marking 05N03L 05N03L Maximum Ratings, at Tj = 25 °C, unless otherwise specified Parameter Symbol Continuous drain current1) TC = 25 °C 1) ID Pulsed drain current TC=25°C Avalanche energy, single pulse ID=55A, VDD=25V, RGS=25Ω Repetitive avalanche energy, limit [ ... ]

05N03L PDF Datasheet Download