A manual service disconnect for the in-vehicle electric current, which has a switch seat, a safety plug assembly, and a protection cover. The switch seat has a seat portion and a plug holder. The plug holder is provided with multiple power legs. The seat portion is hollow inside and has a plug port and a wire opening. The plug holder is disposed in the seat portion and faces the plug port. The power legs project from the wire opening. The safety plug assembly has a plug portion matching the seat portion and a plug head disposed on the plug portion. The protection cover is disposed on the seat portion and covers the wire opening to cover the power legs for protection.