Compact starter with adjustable trip class
The Siemens 3RA6120-0EB30 is a SIRIUS compact starter — a direct starter that integrates the contactor and overload relay into a single 45 mm-wide housing, saving panel space compared to a two-device combination. The overload trip class is field-adjustable between Class 10 and Class 20, letting you match the thermal protection to the motor start profile — Class 10 for fast-starting loads like pumps, Class 20 for high-inertia loads such as conveyors or fans.
Control voltage and mounting flexibility
The coil accepts both AC and DC at 24 V (24... 24 V DC, 24 V at 50/60 Hz), simplifying wiring in mixed-voltage control panels — one part covers both supply types. Mounts vertically or horizontally on standard DIN rail via screw and snap-on fastening; the 45 x 170 x 165 mm (W x H x D) footprint fits standard 45 mm-wide DIN-rail slots, and the any-position mounting orientation eases layout in tight enclosures. The main circuit connects via plug-in terminals without screw clamps — the plug-in design speeds replacement and reduces wiring errors during commissioning.