The 3RW5216-3AC05 is a SIRIUS-brand soft starter with a minimum operating current of 14 A and a rated voltage range of 200 to 600 V, covering most low-voltage three-phase motor applications from 200 V delta up to 600 V wye configurations. CLASS 20E allows 20 seconds for high-inertia loads such as centrifuges or crushers. The unit integrates directly into PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET networks — no separate gateway needed for most control architectures, though PROFIenergy requires the PROFINET standard communication module.
Panel fit and clearance — 275 x 170 x 152 mm
Mounts via screw fixing with a vertical mounting surface that can be rotated ±90° or tilted ±22.5° front-to-back — gives flexibility in tight enclosures without needing a separate adapter plate. Clearance requirements: 100 mm upward, 75 mm downward, 10 mm forward, 5 mm at the sides, and 0 mm backward — the zero backward clearance means the back can sit flush against the panel backplate, saving depth in shallow enclosures.
Operating conditions and derating
Ambient temperature range during operation is -25 to +60 °C, but derating applies above 40 °C — at 50 °C expect roughly 80% of rated current, and at 60 °C roughly 60%, though the exact curve depends on enclosure ventilation and load duty cycle. Minimum load is 15% of the smallest settable Ie — below that the soft starter may not reliably detect the motor current; this matters for lightly loaded motors or variable-torque loads that run near no-load.
Features for pump and process control
Includes pump ramp down and soft torque — pump ramp down gradually reduces voltage on stop to prevent water hammer in pipeline systems; soft torque provides a gentler acceleration curve for delicate loads like conveyors with fragile product. Auto-reset and remote reset (by cycling the 24 V DC control supply) are both supported — useful for unattended pumping stations where a manual reset visit would be costly. Analog output is configurable as 4-20 mA (default) or 0-10 V when parameterized via the High Feature HMI — provides motor current feedback to a PLC or SCADA without a separate current transformer.
Regulatory approvals and compliance documentation
Carries CE marking for European markets, UL approval for North American installations, and CSA approval for Canadian sites — covers the three major industrial certification regimes without needing separate variants. Firmware update capability is supported — the unit can be field-upgraded via the communication interface, which matters for sites standardizing on a specific firmware revision across multiple soft starters.