# ABB S203-B20 Miniature Circuit Breaker, 3-Pole, Type B, 20A, 230-400V

**URL:** https://aio.lv/en/product--abb-s203-b20--1512069
**Data updated:** 2026-05-18 02:46 (EEST)
**Category:** Power Sockets
**Manufacturer:** ABB
**Manufacturer code:** S203-B20
**EAN:** 4016779469104
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 27.99 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 23.13 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--abb-s203-b20--1512069

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

The ABB S203-B20 is a high-performance 3-pole miniature circuit breaker designed for reliable electrical circuit protection. With a rated current of 20A and a breaking capacity of 20000A, it is suitable for industrial and residential applications operating at 230-400V. This Type B device ensures efficient protection against short circuits and overloads, providing safety and durability for your electrical distribution systems.

## Long description

The ABB S203-B20 is a high-performance 3-pole miniature circuit breaker engineered to provide robust protection for electrical distribution systems. This device is designed to safeguard circuits against both overloads and short circuits, ensuring the safety and longevity of connected electrical equipment. Operating at a rated current of 20A and compatible with voltages between 230V and 400V, it serves as a reliable component for managing electrical loads in various environments.
Advantages
This miniature circuit breaker features a dual tripping mechanism, combining a delayed thermal element for overload protection with an electromechanical element for rapid short-circuit response. Its current-limiting design helps minimize potential damage during fault conditions. The unit is built to high international standards, ensuring consistent performance and durability. Furthermore, the compact design allows for efficient installation, and it supports the mounting of bottom-fitting auxiliary contacts to optimize space within electrical enclosures.
Suitable for
Residential electrical distribution boards
Commercial building power management
Industrial machinery and control circuits
Protection of lighting and heating systems
This device may not be suitable for applications requiring a different tripping characteristic, such as Type C or D, which are better suited for high-inrush current loads like large motors or transformers. It is also not intended for use in DC circuits unless specifically rated for such applications.
Key specifications
Number of poles: 3
Tripping characteristic: Type B
Rated current: 20A
Operating voltage: 230-400V AC
Weight: 0.375 kg
Color: Black and Grey
Compliance: IEC/EN 60898-1, IEC/EN 60947-2, UL1077, CSA 22.2 No. 235
How to use
The ABB S203-B20 should be installed by a qualified electrician in accordance with local electrical codes and safety regulations. It is designed for mounting on standard DIN rails within a distribution board or consumer unit. Ensure that the supply voltage and load requirements match the specifications of the breaker before connection. Once mounted, the input and output cables should be securely fastened to the terminals to ensure proper electrical contact.
What to consider before purchase
Verify that the 20A rating is appropriate for your specific circuit load.
Confirm that the 3-pole configuration matches your electrical system requirements.
Ensure the Type B characteristic is suitable for the intended application.
Check available space in your distribution board for installation.
Usage recommendations
Always ensure that the power supply is disconnected before performing any installation or maintenance work on the circuit breaker. Regularly inspect the device for signs of wear or damage to maintain optimal safety levels.

## Specifications

| Feature | Value |
|---|---|
| Type | Type B |
| Storage temperature (T-T) | -40 - 70 |
| Breaking capacity | 20000 A |
| Circuit breaker type | Miniature circuit breaker |

### Features

| Feature | Value |
|---|---|
| Operating temperature (T-T) | -25 - 55 |
| Number of poles | 3 |

### Design

| Feature | Value |
|---|---|
| Certification | IEC/EN 60898-1
IEC/EN 60947-2
UL 1077 |
| Product colour | Black, Grey |
| International Protection (IP) code | IP20 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.375 kg |
| Height | 88 mm |
| Width | 52.5 mm |
| Depth | 69 mm |

### Power

| Feature | Value |
|---|---|
| Input voltage | 230 - 400 |
| Rated current | 20 A |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 400 g |
| Package depth | 58 mm |
| Package height | 80 mm |
| Package width | 92 mm |

### Technical details

| Feature | Value |
|---|---|
| Sustainability certificates | RoHS |

## FAQ

### How much does the ABB S203-B20 Miniature Circuit Breaker 3-Pole 20A cost, and is it available for purchase?

The price is 27.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 42 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 16.07.2026 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 ABB 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 ABB 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.

### Where can I download the instructions for ABB S203-B20 Miniature Circuit Breaker 3-Pole 20A?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/1512069/57988308_large.webp