# Siemens 3RV2021-4BA20 Motor Circuit Breaker, 14-20A, Size S0

**URL:** https://aio.lv/en/product--siemens-3rv20214ba20--1840569
**Data updated:** 2026-05-18 02:47 (EEST)
**Category:** Power Sockets
**Manufacturer:** Siemens
**Manufacturer code:** 3RV20214BA20
**EAN:** 4011209724440
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 66.99 €
**Prices and availability valid until:** 2026-08-08 23:59
**Price without VAT (21%):** 55.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rv20214ba20--1840569

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.07.2026 | free |
| Pickup points | 03.08.2026 | 1.89 EUR |
| Courier delivery to door | 03.08.2026 | 4.99 EUR |

## Summary description

The Siemens 3RV2021-4BA20 is a high-quality motor circuit breaker designed for reliable protection of electric motors. Featuring a current setting range of 14-20A and a compact S0 size, this device provides efficient short-circuit and overload protection. It is an essential component for industrial automation and motor control systems, ensuring safe operation and longevity of connected equipment in various electrical installations.

## Long description

The Siemens 3RV2021-4BA20 is a professional-grade motor circuit breaker engineered to provide robust protection for electric motors in demanding industrial environments. With a precise current setting range of 14-20A and a compact S0 frame size, this device is designed to safeguard electrical systems against the risks of short circuits and thermal overloads. Its reliable switching mechanism ensures consistent performance, making it a critical component for maintaining the operational integrity of motor control circuits.
Advantages
This motor circuit breaker offers exceptional reliability and durability, ensuring that connected equipment remains protected against electrical faults. The compact S0 design allows for efficient use of space within control cabinets, facilitating easier installation in dense electrical panels. By providing both short-circuit and overload protection in a single unit, it simplifies system architecture and reduces the need for additional protective components. Its robust construction is built to withstand the rigors of continuous industrial operation, contributing to the overall longevity of your motor systems.
Suitable for
Industrial automation systems
Motor control centers
HVAC equipment protection
Conveyor belt motor management
Pump and fan control applications
When it may not be suitable
This device is specifically calibrated for motor protection within the 14-20A range and may not be suitable for applications requiring significantly higher or lower current ratings. It is not intended for use in residential household circuits or for non-motorized electrical loads that require different tripping characteristics.
Key specifications
Current setting range: 14-20A
Size: S0
Protection type: Short-circuit and overload
Number of poles: 3
How to use
The device should be installed by a qualified professional within a suitable electrical enclosure. Mount the unit onto a standard DIN rail and connect the power supply and motor cables to the designated terminals, ensuring all connections are tightened to the manufacturer's specified torque. Once installed, the current setting can be adjusted using the dial on the front of the unit to match the rated current of the motor being protected. After configuration, the breaker can be operated manually using the toggle switch to start or stop the motor circuit.
What to consider before purchase
Verify that your motor's full-load current falls within the 14-20A range.
Ensure the S0 size fits your existing control panel layout.
Confirm that the installation environment meets the required safety and temperature standards.
Usage recommendations
Regularly inspect the device for signs of wear or thermal damage and perform periodic testing of the tripping mechanism to ensure continued operational safety.

## FAQ

### How much does the Siemens 3RV2021-4BA20 Motor Circuit Breaker cost, and is it available for purchase?

The price is 66.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 29.07.2026 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. All transactions are 100% secure and encrypted.

### 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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