# Siemens 3RV2021-4BA25 Motor Circuit Breaker, 3-Pole, 13-20A, 7.5kW, Spring-Loaded Terminals, Size S0

**URL:** https://aio.lv/en/product--siemens-3rv20214ba25--1840608
**Data updated:** 2026-05-18 02:47 (EEST)
**Category:** Power Sockets
**Manufacturer:** Siemens
**Manufacturer code:** 3RV20214BA25
**EAN:** 4011209841277
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The Siemens 3RV2021-4BA25 is a high-performance motor circuit breaker designed for reliable protection of electric motors. Featuring a 3-pole configuration, it supports a current range of 13-20A and a power rating of 7.5kW. Equipped with spring-loaded terminals for secure and efficient installation, this size S0 device includes 1NO and 1NC auxiliary contacts, making it ideal for industrial control and automation systems.

## Long description

The Siemens 3RV2021-4BA25 is a robust motor circuit breaker engineered to provide dependable protection for electric motors in demanding industrial environments. This 3-pole device is designed for a current range of 13-20A and supports a power rating of 7.5kW. Built in the compact S0 size, it integrates seamlessly into control cabinets, offering both short-circuit and overload protection to ensure the longevity and safety of connected motor equipment.
Advantages
The primary benefit of this motor circuit breaker is its high level of operational reliability and safety. The inclusion of spring-loaded terminals significantly reduces installation time while ensuring a vibration-resistant and maintenance-free connection. With integrated 1NO and 1NC auxiliary contacts, the device provides essential feedback for monitoring and control systems, enhancing the overall efficiency of industrial automation setups.
Suitable for
Industrial motor protection
Automation and control systems
Heating, ventilation, and air conditioning systems
Pump and compressor control
When it may not be suitable
This device is not intended for use in circuits exceeding its specified current range of 13-20A or power rating of 7.5kW. It is also not suitable for environments that require specific ingress protection ratings beyond standard control cabinet installations without additional protective enclosures.
Key specifications
Number of poles: 3
Current range: 13-20A
Power rating: 7.5kW
Size: S0
Connection type: Spring-loaded terminals
Auxiliary contacts: 1NO + 1NC
How to use
Installation should be performed by qualified personnel in accordance with local electrical regulations. The device is designed for mounting on a standard DIN rail. Insert the power cables into the spring-loaded terminals, ensuring they are securely seated. The auxiliary contacts can be wired to your PLC or control relay to provide status signals. Once installed, the thermal release can be adjusted within the 13-20A range to match the specific requirements of the connected motor.
What to consider before purchase
Verify that the motor's nominal current falls within the 13-20A range.
Ensure the 7.5kW power rating is compatible with your motor application.
Confirm that your wiring setup supports spring-loaded terminal connections.
Check available space in the control cabinet for size S0 components.
Usage recommendations: Regularly inspect the terminal connections and test the trip mechanism periodically to ensure continued protection of your motor assets.

## FAQ

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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

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