The 3RT1034-1AM20-1AA0 is a Siemens SIRIUS power contactor in Size S2, built for switching motor loads in industrial control panels. It mounts via screw or snap-on onto a 35 mm DIN rail per DIN EN 50022, with screw-type terminals on the main current circuit. The front face carries an IP20 rating, while the terminals themselves are IP00 — meaning the wiring compartment is open to the panel environment, so maintain clearance around live parts.
Sizing and fit
At 55 mm wide, 112 mm tall, and 115 mm deep, this Size S2 contactor fits a standard 55 mm-wide DIN-rail slot. Side-by-side mounting is supported, so you can gang multiple contactors without spacing blocks — useful when packing several motor starters into a single enclosure.
Termination and wiring
Main circuit terminals accept solid conductors up to 2x 4 mm² or stranded up to 2x 25 mm². The solid range covers two conductors from 0.5 to 1.5 mm², two from 0.75 to 2.5 mm², or a maximum of two from 0.75 to 4 mm². Stranded terminations handle two conductors from 0.75 to 25 mm². This flexibility covers most motor feeder and control wiring gauges found in panel builds.