Part overview
The Siemens 5TT5702-0 is an insta contactor with two normally closed (NF) contacts, rated for 230 V and 400 V AC at 20 A, with a 230 V AC activation coil.
What the ratings mean for the buyer
The 20 A rating at 400 V AC means this contactor handles motor or resistive loads up to that current in a 400 V line — typical for lighting banks, small heater circuits, or auxiliary contactor duty in a panel. The 230 V AC coil is standard for European control circuits; verify your control transformer taps before wiring.
Deployment context
Snap-on DIN rail mounting for panel integration. Two NC contacts suit fail-safe or interlock circuits where the load must de-energize on coil drop-out.