# 3RW4453-6BC45 SIRIUS Soft Starter 551A 355kW - Siemens Motor Control

The **3RW4453-6BC45 SIRIUS Soft Starter** from Siemens is engineered for smooth and efficient motor starting, making it an essential component in industrial applications. This soft starter, with a robust 551A current rating and a capacity to handle motors up to 355kW, offers superior control, protection, and operational efficiency for your high-power motors. It is ideally suited for industries requiring reliable and energy-efficient motor control solutions.

This **SIEMENS SIRIUS Soft Starter** provides advanced features, including adjustable soft start and stop functions, overload protection, and phase failure detection. These capabilities minimize wear and tear, reducing downtime and maintenance costs. The **3RW4453-6BC45** is built to withstand harsh industrial conditions, ensuring consistent performance and long-term reliability. Its rugged design helps in reducing the frequency of maintenance, leading to increased productivity and cost savings. This soft starter is perfect for use with pumps, fans, compressors and conveyors.

**Key Features:**

-   **Soft Start and Stop:** Ensures smooth motor operation, reducing mechanical stress.
-   **Overload Protection:** Safeguards motors from potential damage, extending lifespan.
-   **Phase Failure Detection:** Prevents motor damage by detecting and responding to phase failures.
-   **High Current Capacity:** Designed to handle motors up to 551A and 355kW.
-   **Durable Design:** Built to withstand harsh industrial environments, ensuring reliability.

**Specifications:**

Current Rating: 551A  
Motor Power: 355kW  
Series: SIRIUS  
Model Number: 3RW4453-6BC45  
Brand: Siemens

The **3RW4453-6BC45 SIRIUS Soft Starter** is a dependable solution designed to enhance the performance and longevity of your industrial motor systems. Embrace the reliability and efficiency offered by this Siemens product, ensuring optimal operation in your industrial or automation setups. For more information or assistance, contact us at [info@ramautomations.com](mailto:info@ramautomations.com) Ram Automations.

## Details

- **Price:** 999.0 USD
- **Vendor:** Siemens
- **Type:** Industrial Automation > Motor Control > Soft Starters
- **Tags:** 3RW4453-6BC45, 551A soft starter, industrial automation, motor control, Siemens, soft starter

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 999.00 USD | In stock |

## Images

- 3RW4453-6BC45 SIRIUS Soft Starter 551A 355kW - Siemens Motor Control-Ram Automations

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> Source: [Ram Automations](https://ramautomations.com/products/3rw4453-6bc45-sirius-soft-starter)
> Updated: 2026-10-19