The Siemens 3RT2035-3AL16 is a SIRIUS power contactor in the Size S2 frame, rated for 40 A at 480 V (AC-1 duty) with spring-type terminals. It mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, making it a direct panel-integration part for motor and resistive load switching in industrial control cabinets.
Ratings and what they mean for fit
The 40 A at 480 V AC-1 rating covers resistive loads like heaters and lighting banks up to that current. For motor duty (AC-3), the contactor's maximum operating rate is 1 000 cycles per hour, which suits conveyor and pump cycling without overheating the coil or contacts. The spring-type terminals accept 2x (0.5... 2.5 mm²) solid or stranded wire — no screw torque to verify, which speeds panel wiring and reduces QA checks on termination.
Integration and mounting
Snap-on to 35 mm DIN rail per DIN EN 60715; the mounting position allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward/backward, giving flexibility in tight enclosures. Clearance: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the side — plan your gland plate and wireway accordingly. Dimensions: 114 mm high, 75 mm wide, 130 mm deep.