The invention discloses a rectangular low-
voltage connector, which comprises a plug sheath, a secondary locking part, a sealing ring, a sealing
gasket, a rear cover and a plurality of terminals. The plug sheath is composed of a
kidney-shaped lower end wall, a
kidney-shaped outer side wall and a
kidney-shaped upper end wall, a terminal
locking plate is arranged in the plug sheath, a plurality of first locking holes are formed in the terminal
locking plate, and the upper end wall is composed of a high side plate, a low side plate and primary locking hooks; the secondary lock part is provided with a primary back lock buckle, a limiting stop lug, two secondary lock catches and a plurality of second lock holes; the rear cover is provided with a plurality of through holes, a clamping edge and athird lock hook; a plurality of convex holes are formed in the sealing
gasket; each terminal comprises a plug part, a hanging point part and a wire pressing part from top to bottom in sequence. The rear cover is arranged on the lower end wall of the plug sheath, the secondary locking part is arranged in the upper end wall of the plug sheath, and the terminal with the pressed wire is inserted intothe plug sheath. By utilizing the
stroke height of the second locking hole in the secondary locking part, after the terminal is inserted, the positioning elastic hook of the terminal is just located at the hanging point part of the terminal.