Attributes . This 2-pole industrial relay minimizes the space requirements in a control cabinet without compromising performance. By applying an input voltage on control A, the corresponding output semiconductor is activated at the first zero crossing of the line voltage. The same applies to control B. LEDs indicate the control status of each pole. The optimized design is free of moulding mass to reduce internal mechanical stress. The RA2A..M types have been specially customized for demanding inductive loads. . Names