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.
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.