There are two ways of switching ohmic loads in accordance with utilisation
category AC-1:

On one hand the 3RT10 motor contactors, which can be used to switch inductive loads, e.g.according to utilisation categories AC-2/AC-3 and AC-4 and also to switch ohmic loads according AC-1.

On the other hand the special 3RT14 AC-1 contactors with 3 NO main contacts. These are cost-effective alternatives for rated operating currents greater than 100 A to 690 A. These AC-1 contactors are especially optimised to switch loads according to utilisation category AC-1.