# Siemens 3RV2021-4BA10 Motor Circuit Breaker 3-Pole 7.5kW 14-20A Size S0

**URL:** https://aio.lv/en/product--siemens-3rv2021-4ba10--1796203
**Data updated:** 2026-05-18 02:39 (EEST)
**Category:** Power Sockets
**Manufacturer:** Siemens
**Manufacturer code:** 3RV2021-4BA10
**EAN:** 4011209712522
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 85.49 €
**Prices and availability valid until:** 2026-08-10 23:59
**Price without VAT (21%):** 70.65 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rv2021-4ba10--1796203

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.07.2026 | free |
| Pickup points | 04.08.2026 | 1.89 EUR |
| Courier delivery to door | 04.08.2026 | 4.99 EUR |

## Summary description

The Siemens 3RV2021-4BA10 is a high-performance 3-pole motor circuit breaker designed for reliable motor protection. With a power rating of 7.5kW and an adjustable current range of 14-20A, this size S0 device ensures optimal safety and control for industrial electrical systems. It provides effective protection against short circuits and overloads, making it an essential component for motor starters and control cabinet applications.

## Long description

The Siemens 3RV2021-4BA10 is a robust 3-pole motor circuit breaker engineered to provide dependable protection for industrial electric motors. Designed for efficiency and safety, this size S0 device is specifically calibrated to handle a power rating of 7.5kW with an adjustable current range between 14A and 20A. It serves as a critical safeguard in electrical control systems, effectively mitigating risks associated with short circuits and thermal overloads to ensure the longevity and stable operation of connected machinery.
Advantages
This motor circuit breaker offers high operational reliability and precise protection settings, allowing users to fine-tune the current range to match specific motor requirements. Its compact size S0 design facilitates space-saving installation within control cabinets, while the integrated short-circuit and overload protection mechanisms provide comprehensive safety for electrical circuits. The device is built to withstand demanding industrial environments, ensuring consistent performance and reduced downtime for motor-driven applications.
Suitable for
Industrial motor starter assemblies
Control cabinet installations
Protection of three-phase induction motors
Automation and process control systems
This device may not be suitable for applications requiring current ratings outside the 14-20A range or for systems exceeding the 7.5kW power capacity. It is also not intended for use in environments where specialized explosion-proof or high-ingress protection ratings are mandatory without additional protective enclosures.
Key specifications
Number of poles: 3
Power rating: 7.5kW
Current adjustment range: 14-20A
Size: S0
Weight: 0.359 kg
How to use
The device is designed for mounting on standard DIN rails within a control cabinet. Installation should be performed by qualified personnel in accordance with local electrical regulations. Once mounted, the current setting dial on the front of the unit should be adjusted to the nominal current of the motor being protected. After wiring the power supply and motor leads to the corresponding terminals, the breaker can be manually switched on or off using the front-facing toggle. Regular inspection of the terminals and the physical condition of the unit is recommended to ensure continued operational integrity.
What to consider before purchase
Verify that the motor's nominal current falls within the 14-20A range.
Ensure the 7.5kW power rating is compatible with your specific motor load.
Check available space in your control cabinet for size S0 components.
Confirm compatibility with existing DIN rail mounting systems.
Usage recommendations
Always ensure that the power supply is disconnected before performing any installation or maintenance work on the circuit breaker. Periodically test the trip function to verify that the protection mechanisms are operating correctly.

## Specifications

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.359 kg |

### Design

| Feature | Value |
|---|---|
| Product colour | Multicolour |

## FAQ

### How much does the Siemens 3RV2021-4BA10 Motor Circuit Breaker cost, and is it available for purchase?

The price is 85.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 13 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. All transactions are 100% secure and encrypted.

### Can Siemens 3RV2021-4BA10 Motor Circuit Breaker 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/1796203/58085578_large.webp