I-6K is a Satellite bus developed by Indian Space Research Organisation (ISRO) ^[1] It will be a standard bus for 4,000–6,500 kg (8,800–14,300 lb) class communication satellites;^[2] the I in I-6K stands for INSAT and 6 signifies that it can support satellites up to 6,000 kg in weight. The I-6K spacecraft bus can supply DC power of 10 to 15 kilowatts.