3RT1900-1SB20

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The integration of four conducting paths to a reverse switch combined in one enclosure makes this device a particularly compact solution. Compared to conventional systems, for which two contactors are required, it is possible to save up to 50% in width with the three-phase reversing contactors. Devices with a width of 45В mm cover motors up to 2.2В kW – and those with a width of 90В mm cover motors up to 3В kW.¹⁾

¹⁾ In accordance with the product standard IECВ 60947‑4‑2, the motor contactors are designed for motors with maximum starting current conditions of I/I_e ≤ 8. For configuring motors with higher starting current conditions (typically I/I_e ≥ 8), the data in the "SIRIUS 3RF34 solid-state switching devices" manual must be taken into account, see https://support.industry.siemens.com/cs/ww/en/view/60298187.