An electrical connector (1, 100) for a DIN rail (2) with rail flanges (6), including a body (3, 102), a carrier (16, 104) vertically movable with respect to the body (3, 102), an actuator (14, 110) and a pair of clamp members (5, 106, 108) having rail-engageable hook portions (26, 148). At least one of the clamp members (5, 106, 108) is movable toward the other by the carrier (16, 104) upon actuation for mechanically and electrically clamping onto a respective rail flange (6). A pair of such clamp members (5) may be cammed inwardly and upwardly along slots (30) in side walls (9) of body (3) upon actuation, or the clamp members (106, 108) may include flanges (158) pivotably held in body side wall holes (162) for rotating the hook portions (148) inwardly and upwardly against the rail flanges (6). Such connector (1, 100) is adapted to be mounted beneath a circuit board (10) prior to being clamped onto the DIN rail (2).