Controls – Solid-State Switching Devices Introduction Solid-State Switching Devices General data Solid-State Switching Devices for Resistive Loads General data Solid-State Relays General data 3RF21 solid-state relays, single-phase, 22.5 mm 3RF20 solid-state relays, single-phase, 45 mm 3RF22 solid-state relays, three-phase, 45 mm Solid-State Contactors General data 3RF23 solid-state contactors, single-phase 3RF24 solid-state contactors, three-phase 3RF29 Function Modules General data Converters Load monitoring Heating current monitoring Power controllers Power regulators Project planning aids Solid-State Switching Devices for Switching Motors Solid-State Contactors General data 3RF24 solid-state contactors, three-phase 3RF24 solid-state reversing contactors, three-phase Siemens · 2009 4 5 6 8 9 15 19 25 26 35 44 46 47 48 49 50 51 53 55 61