An electromagnetic switching device, with several distinct regions (10, 20, 30, 40), where each region separates and places the terminals and the connection means in an improved form which make easy the identification of the terminals for the user when the contactor is fixed inside the panel; where the first region (10), have function of fixing the contactor on the panel and also houses the electromagnet; a second region (20) comprising the power terminals (21); a third region (30) that houses the auxiliary terminals (31, 32) and the command terminals (33); a fourth region (40)>> that is used for the connection of accessories; the third region presents a clear distinction between auxiliary terminals (31, 32) and command terminals (33), given by the asymmetry created viewed from the top; combined with a proposed uneven disposition X1 and X2 of the command terminals (31, 32) and auxiliary terminals (33) viewed from the front in the same third region.