Siemens 3RW4028-1BB14

Siemens 3RW4028-1BB14 | SIRIUS 57A Soft Starter with 24V Control for Smooth Motor Starting

Overview

The Siemens 3RW4028-1BB14 is a solid-state soft starter from the SIRIUS 3RW40 series, designed to reduce mechanical stress and inrush current when starting three-phase motors up to 30 kW (at 400V). It supports a rated operational current of 57A, operates on a 400V AC main circuit, and uses a 24V AC/DC control voltage. The device features an integrated bypass contactor for energy-efficient operation and Size S2 housing for panel-mounted systems.

Key Features

• Rated Operational Current: 57A (AC-53a)

• Rated Operational Voltage: 3AC 400V

• Motor Rating (400V): Up to 30 kW

• Control Voltage: 24V AC/DC

• Start/Stop Functions: Soft start, soft stop

• Bypass Contactor: Built-in for reduced heat dissipation

• Motor Protection: Adjustable overload trip class

• Enclosure Type: IP20

• Mounting: DIN rail or screw mounting (Size S2)

Technical Specifications

• Catalog Number: 3RW4028-1BB14

• Series: SIRIUS 3RW40

• Utilization Category: AC-53a

• Adjustable Parameters: Ramp time, starting voltage, current limit

• Ambient Temperature: -25°C to +60°C

• Dimensions (HxWxD): Approx. 145 × 90 × 165 mm

• Certifications: CE, UL, CSA, EAC, RoHS

• Connection Type: Screw terminals

Applications

• Pumps and compressors

• Fans and blowers

• Conveyor systems

• HVAC equipment

• Machine tools and mixers

Why Choose the 3RW4028-1BB14?

• Smooth Motor Starting: Reduces mechanical stress and wear

• Built-in Bypass: Enhances efficiency and reduces panel heat

• Compact Size: Size S2 footprint saves control cabinet space

• Reliable Siemens Quality: Trusted for industrial use

• Versatile Control: Accepts 24V AC/DC logic signals

Order Now

The Siemens 3RW4028-1BB14 soft starter is available for global shipping.