SIRIUS S00 power contactor — 3RT1316-2AN20
The Siemens 3RT1316-2AN20 is a SIRIUS power contactor in the compact S00 frame size, designed for switching motor loads and resistive circuits in industrial control panels. It carries 4 normally-open main contacts and is rated for 10 A maximum in AC-12 duty (control-circuit loads), with a motor-switching capability of 4 kW at 400 V under AC-2 use (slip-ring motors). The spring-loaded terminals accept 2x (0.25 to 2.5 mm²) solid or stranded wire, and the unit mounts via screw or snap-on onto a 35 mm DIN rail per EN 50022. The 45 mm width and 72 mm depth make it a space-efficient fit for crowded enclosures, and side-by-side mounting is permitted without derating in standard ambient conditions. Pollution degree 3 rating suits it for industrial environments with conductive dust or occasional condensation.
Auxiliary contact ratings and coordination
The auxiliary contact block integrated into this contactor handles switching at various control voltages: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, and 3 A at 400 V. These ratings cover the typical range for PLC outputs, relay coils, and indicator lamps in a control circuit. For short-circuit protection, the manufacturer specifies a gL/gG fuse of 20 A for Type 2 coordination (no damage to the contactor) and 35 A for Type 1 coordination (contactor may need replacement after fault). This lets the panel builder size the branch protection to match the required selectivity level.