Siemens 3RW4056-6BB44 SIRIUS Soft Starter

SKU 3RW4056-6BB44

In stock

12-month warranty
Free returns within 30 days

Manufacturer: Siemens
Product No.: 3RW4056-6BB44
Country of origin:Germany
Product Type: Soft starters
Barcode: 85044095
Payment: T/T, Western Union
Weight: 6770g
Dimensions: 33.20cm x 25.20cm x 17.20cm
Shipping port: Xiamen
Warranty: 12 months

Description

The 3RW4056-6BB44 is a SIRIUS electronic soft starter designed to facilitate the smooth starting and stopping of three-phase induction motors. By providing a controlled voltage ramp, this unit reduces mechanical stress on the drive train and limits high inrush currents during startup, thereby extending the lifespan of motors, belts, and gearboxes. Rated for 162 A and 90 kW at 400 V, this device is intended for industrial applications where motor protection and controlled acceleration are critical. Please note that this product has been phased out, and the recommended functional successor is the SIRIUS 3RW5056-6AB14.

Features

Motor Control: Provides soft start and soft stop to minimize mechanical shock.
Capacity: Rated operational current of 162 A; 90 kW at 400 V.
Operational Voltage: 200–460 V AC.
Control Voltage: 230 V AC.
Connections: Rugged screw terminals for secure electrical termination.
Successor: Compatible with the SIRIUS 3RW5 series (Type: 3RW5056-6AB14).

Applications

Conveyor systems and transport equipment.
Pumps and compressor control.
Industrial fans and blowers.
Centrifuges and agitators.
HVAC system motors.

Technical Specifications

Feature	Specification
Manufacturer	Siemens
Range	SIRIUS
Model	3RW4056-6BB44
Operational Current	162 A
Power Rating	90 kW (at 400 V)
Operational Voltage	200–460 V AC
Control Voltage	230 V AC
Protection Rating	IP00
Weight	6.77 kg
Dimensions	33.20 cm x 25.20 cm x 17.20 cm
Origin	Siemens

Installation Guidelines

Mounting: Mount the soft starter vertically in a control cabinet with adequate space above and below for cooling airflow.
Ventilation: Ensure the ambient temperature does not exceed 40 degC; provide forced ventilation if the enclosure heat dissipation is insufficient.
Wiring: Use appropriately sized power cables for 162 A operation. Tighten all screw terminals to the torque specifications provided in the original manual to prevent overheating.
Protection: The device is rated IP00; ensure it is installed within a properly rated electrical enclosure to provide protection against touch and environmental ingress.
Grounding: Connect the device chassis to a common protective earth (PE) busbar to ensure electromagnetic compatibility and operator safety.

FAQ

What is the recommended replacement for the 3RW4056-6BB44?

The preferred successor type for this phased-out soft starter is the SIRIUS 3RW5056-6AB14.

What are the primary operational parameters for this model?

It is rated for 162 A operational current and 90 kW power at 400 V, operating within a 200–460 V AC voltage range.

What is the ingress protection rating of this unit?

The device has an IP00 protection rating, meaning it requires installation inside a protective electrical cabinet.

How does the soft starter benefit motor operation?

It provides soft acceleration and deceleration, which reduces mechanical stress on the motor and connected equipment while minimizing inrush current.

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Shipping & Returns

Global Express Shipping

Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our technical warranty.

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Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).

For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Color pattern	Black
Country of origin	Germany
Power source	AC-powered