Contactor with conductor channel and load branch circuit with a contactor of this type

A contactor includes a housing having a mounting side, an operating side, main connector surfaces and side surfaces. The operating side lies opposite the mounting side and is connected to the mounting side by main connector surfaces and side surfaces. The main connector surfaces lie opposite one another and the side surfaces lie opposite one another. The operating side has a raised central area and two edge areas, which border a central area on both sides of the central area. The edge areas border the main connector areas and are connected to the central area by way of an additional connector area in each case. Main terminals, connected to load contacts of the contactor, have main receptacle openings into which main conductors are fed from one of the main connector surfaces. Additional terminals have receptacle openings into which additional conductors are fed from additional connector surfaces.