What It Is and Where It Fits
The Siemens 3RT1015-2VB41 is a SIRIUS power contactor in the compact S00 frame size, designed for switching motor loads and resistive circuits in industrial control panels. It mounts via screw or snap-on onto 35 mm DIN rail per EN 50022, occupying a 45 mm width — a standard slot in any panel layout. The coil is rated 24 V DC with an integrated diode surge suppressor, drawing 1.4 W for both closing and holding — a consistent load on the DC supply that simplifies power budgeting in the control circuit. Main circuit connections use spring-loaded terminals accepting 2x (0.25 to 2.5 mm²) solid or stranded wire (24 to 14 AWG), which speeds wiring and eliminates periodic re-torquing common with screw terminals.
Key Ratings and What They Mean for Fit
The contactor is rated for AC-12 switching at 10 A maximum — this is the resistive load rating, meaning it handles heaters, lamps, and transformer primaries up to that current. For motor duty, the AC-2 rating at 400 V is 3 kW, and the AC-4 rating (plugging/reversing) at 400 V is 6.5 A — the AC-4 figure is the one to watch for high-inertia or frequent-reversing loads, as it governs contact wear life. Auxiliary contact ratings cover DC switching: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V. These are the DC-13 values for solenoid/relay loads — the voltage derating is steep, so verify the auxiliary circuit voltage before committing the BOM. Short-circuit coordination requires a gL/gG fuse: 20 A for Type 2 coordination (no damage to the contactor), 35 A for Type 1 (contactor may need replacement after fault). This is the spec the panel designer needs for the SCCR declaration.
Integration Notes for the Panel Builder
Dimensions are 45 mm wide, 60 mm high, 73 mm deep — the S00 footprint fits alongside other SIRIUS components on the same DIN rail without extra spacing, and side-by-side mounting is permitted (no derating required for adjacent units at rated current). The contactor is rated IP20 on the front and at the terminals — suitable for enclosed panels only; not for washdown or outdoor exposure without an additional enclosure. Pollution degree 3 means it tolerates conductive dust and occasional condensation typical of industrial environments. Operating temperature range is -25 to +60 °C, with a maximum altitude of 2 000 m without derating. The mechanical endurance is 30 million operations typical — this is the life limit for the coil and armature, not the contacts (electrical life depends on load and duty cycle).