# Siemens Sirius 3RW3037-1BB04 Soft Starter 3-Phase 30kW 400V 63A 24V AC/DC

**URL:** https://aio.lv/en/product--siemens-3rw30371bb04--1783007
**Data updated:** 2026-05-27 17:57 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3RW30371BB04
**EAN:** 4011209719286
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 884.99 €
**Prices and availability valid until:** 2026-08-10 23:59
**Price without VAT (21%):** 731.40 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rw30371bb04--1783007

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.07.2026 | free |
| Courier delivery to door | 04.08.2026 | 53.99 EUR |

## Summary description

The Siemens Sirius 3RW3037-1BB04 is a compact 3-phase soft starter designed for smooth motor starting and stopping. It operates at a rated power of 30kW at 400V with a current of 63A and a control voltage of 24V AC/DC. This device reduces mechanical stress and current peaks during startup, extending the service life of industrial motors and electrical systems. Ideal for various industrial applications requiring reliable motor control and protection.

## Long description

The Siemens Sirius 3RW3037-1BB04 is a high-performance 3-phase soft starter engineered to provide controlled acceleration and deceleration for industrial electric motors. By managing the voltage supplied to the motor during the startup phase, this device effectively minimizes mechanical shock and reduces high inrush current peaks that can strain electrical grids and drive components. Its compact design and robust construction make it a reliable solution for optimizing motor performance in demanding industrial environments.
Advantages
This soft starter offers significant benefits by protecting mechanical drive systems from the wear and tear typically associated with direct-on-line starting. By ensuring a smooth transition during motor startup, it helps prevent damage to belts, gears, and couplings, thereby reducing maintenance requirements and downtime. Furthermore, the reduction of current peaks helps maintain the stability of the power supply network, protecting other sensitive equipment from voltage drops and electrical stress.
Suitable for
Conveyor belt systems
Industrial pumps and fans
Compressor units
Centrifugal machinery
General motor control applications
When it may not be suitable
This device is not intended for applications requiring high starting torque, as soft starters reduce voltage to limit current, which inherently lowers the torque available during the startup phase. It is also not suitable for applications that require frequent starts and stops at very high intervals, as this may lead to thermal overload of the internal components.
Key specifications
Rated power: 30kW at 400V
Rated operational current: 63A
Control supply voltage: 24V AC/DC
Phase count: 3-phase
Operational voltage range: 200-480V AC
How to use
The soft starter should be installed in a control cabinet with adequate ventilation to ensure proper heat dissipation. Connect the main power supply to the input terminals and the motor leads to the output terminals. The 24V AC/DC control signal is used to trigger the starting sequence. Ensure that all wiring is performed by qualified personnel in accordance with local electrical regulations. Once installed, the device operates automatically to ramp up the motor voltage to the rated level.
What to consider before purchase
Verify that the motor power rating matches the 30kW capacity of the soft starter.
Ensure the 24V AC/DC control voltage is available in your control system.
Check the physical dimensions to ensure it fits within your existing electrical enclosure.
Confirm that the application does not require high starting torque.
Usage recommendations
Always ensure that the soft starter is protected by appropriate circuit breakers or fuses to prevent damage from short circuits. Regularly inspect the terminal connections for tightness to maintain optimal electrical contact.

## FAQ

### How much does the Siemens Sirius 3RW3037-1BB04 Soft Starter cost, and is it available for purchase?

The price is 884.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 30.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can Siemens Sirius 3RW3037-1BB04 Soft Starter be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Siemens products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Siemens service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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