Overview
The Siemens 3RW3024-1AB14 is a compact, solid-state soft starter from the SIRIUS family, rated for motors up to 5.5 kW (7.5 HP). This Size S0 starter manages the motor acceleration phase by gradually increasing voltage, reducing mechanical shock, inrush current, and thermal stress on the motor and driven equipment. Operating across 200-460V AC (50/60 Hz), it suits both North American and international applications.
Key Features
- Size S0 soft starter with 12.5A rated current and 3-phase design
- Wide voltage range: 200-460V AC rated, ±10% tolerance
- Screw-type main and control terminals for reliable connections
- Compact footprint: 45 mm (W) × 125 mm (H) × 150 mm (D)
- Control voltage: 110-230V AC, enabling flexible system integration
- Vertical mounting with ±10° adjustability; DIN-rail compatible via snap-on adapter
Technical Specifications
- Motor Power: 5.5 kW @ 400V (3 kW @ 230V)
- Rated Current: 12.5A @ 40°C; 11A @ 50°C; 9A @ 60°C
- Operating Voltage: 200-460V AC, ±10% tolerance, 50/60 Hz
- Control Voltage: 110-230V AC
- Number of Poles: 3 (three-phase)
- Connection Type: Screw terminals (main and control circuits)
- Mounting: Screw and snap-on rail mounting, vertically rotatable ±10°
- Spacing Requirements: 60 mm top, 15 mm side, 40 mm bottom clearance
- Installation Altitude: Up to 5,000 m above sea level
- Maximum Cable Length: 100 m
Typical Applications
- Pump and fan motor starts (HVAC systems, water circulation)
- Compressor and blower soft-starting
- Conveyor and production line motor control
- Crane and hoist acceleration control
- Any industrial process requiring smooth, ramp-based motor acceleration to reduce stress and extend equipment life
Compatibility & Replacements
Compatible With
- Three-phase squirrel-cage and wound-rotor AC induction motors (1 hp to 7.5 hp)
- Siemens control systems and DIN-rail automation cabinets
- Panel-mount and open-frame industrial control enclosures
- Standard auxiliary control circuits (24V DC / 110-230V AC)
Replaces / Drop-In Replacement For
- Other Size S0 soft starters in the SIRIUS 3RW30/31 family (verify torque and inrush requirements before swapping)
- Star-delta (wye-delta) starters of equivalent power rating
Works With
- Siemens TIA Portal and STEP 7 control software
- Standard AC power systems (single or three-phase supply)
- Manual and automatic soft-start ramp control (via integrated electronics)
- Open-loop and sensor-based acceleration profiles
