The Siemens 3RT1316-2AP00 is a SIRIUS power contactor in Size S00, built for switching motor loads and resistive loads in industrial control panels. It carries 4 NO main contacts across 4 poles, rated for 4 kW at 400 V in AC-2 duty (slip-ring motor starting) and AC-3 (squirrel-cage motor). The main circuit uses spring-loaded terminals, accepting solid or stranded conductors 2x 0.25 to 2.5 mm². Mounts via screw or snap-on onto 35 mm DIN rail per EN 50022.
Integration and panel fit
At 45 mm wide, 60 mm tall, and 72 mm deep, this contactor fits a standard DIN-rail enclosure with side-by-side mounting permitted — no spacing required between units. Front and terminal protection is IP20, suitable for enclosed panels where accidental finger contact is the main concern. The operating temperature range (-25 to +60 °C) and pollution degree 3 rating mean it handles industrial environments with conductive dust or light moisture.
Motor switching and coordination
The 4 kW rating at 400 V AC-2/AC-3 covers typical small three-phase motors up to that power. For type 1 coordination (no damage to the contactor, but contacts may weld) use a 35 A gL/gG fuse upstream. For type 2 coordination (no welding, ready for immediate reuse) use a 20 A gL/gG fuse. Auxiliary contacts handle 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V — enough for PLC inputs or relay coils in the control circuit.