A power connector system includes a header connector having a header housing mounted to a chassis. The header housing holds a header terminal comprising a plurality of contact members arranged side-by-side in a stacked arrangement. Each contact member has a pair of spring beams defining sockets at a mating end of the contact member. The sockets of the contact members are aligned to define a tab socket of the header terminal. The power connector system includes a plug connector having a plug housing holding a tab terminal. The tab terminal has a mating end and a cable end. The mating end is received in a mating direction into the tab socket of the header terminal during mating to electrically connect the tab terminal with the header terminal.