The CTJ30-Thin from CESI SpA is a Satellite Solar Cell with an efficiency of 29 %. This triple-junction solar cell has an output current of 454 mA and an open circuit voltage of 2.61 V. It has a short circuit current of 473 mA and a maximum power consumption of 1.05 W. The solar cell uses an external by-pass diode for reverse bias protection and features weldable contacts, front and back, based on gold coated silver layers. It has a low mass of 50 mg/cm2 and an area of 26.5 cm2. The solar cell has a thickness of 80 µm and measures 6.9 x 3.9 cm. It has been fully qualified according to standard ECSS E ST20-08C for low-earth orbit and geostationary orbit applications.