SIEMENS SIRIUS 3RW30361BB04 Soft Starter, 400V, 32A, 15kW, 24V AC/DC Control

Starting three-phase motors directly across the line causes high inrush currents and mechanical stress. The SIEMENS SIRIUS 3RW30361BB04 soft starter reduces this stress by ramping up the voltage to the motor, providing smooth acceleration and deceleration for standard asynchronous motors.

Who is it for

This soft starter is for panel builders and machine OEMs who need a compact, reliable starting solution for motors up to 15 kW at 400 V. It suits conveyors, pumps, fans, and other applications where reduced starting current and gentle ramp-up are required.

Main features

• Voltage ramp-up starting method with adjustable ramp-up and ramp-down times from 0 to 20 seconds.
• Integrated bypass contactor reduces heat generation and allows continuous operation after start.
• Rated operational current of 32 A and rated power of 15 kW at 400 V.
• Wide operating voltage range from 200 to 480 V AC, 3-phase.
• Control supply voltage of 24 V AC/DC for flexible integration.
• Compact size S0 with screw terminals and DIN rail or screw mounting.
• Ambient operating temperature range from -25 to +60 °C (derating above 40 °C).

Specifications

• Product Type: Soft Starter
• Series: SIRIUS 3RW30
• Rated Operational Current (Ie): 32 A
• Rated Power (at 400V): 15 kW
• Operating Voltage (Ue): 200 - 480 V AC (3-phase)
• Control Supply Voltage (Us): 24 V AC/DC
• Ambient Operating Temperature: -25 to +60 °C (derating above 40°C)
• Starting Method: Voltage ramp-up
• Motor Protection: No integrated overload protection (requires external)
• Bypass Function: Integrated bypass contactor
• Connection Type: Screw terminals
• Mounting Type: DIN rail / Screw mounting
• Degree of Protection (IP): IP20 (front), IP00 (terminals)
• Number of Phases: 3-phase
• Adjustable Ramp-up Time: 0 to 20 s
• Adjustable Ramp-down Time: 0 to 20 s
• Soft Starter Size: S0
• Approvals: CE, UL, CSA, CCC
• Communication Interface: None
• Application: Standard starting of 3-phase asynchronous motors

Tips

Ensure that the motor's rated current does not exceed 32 A and that an external overload relay is installed for motor protection. For ambient temperatures above 40 °C, derate the soft starter according to the manufacturer's guidelines.