# Circuit breaker Legrand 421054 — Miniature circuit breaker, single-pole, DIN-rail mounting, 193 g

**URL:** https://aio.lv/en/product--legrand-421054--12106058
**Data updated:** 2026-03-20 09:56 (EET)
**Category:** Power Sockets
**Manufacturer:** Legrand
**Manufacturer code:** 421054
**EAN:** 3245064210546
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 61.99 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 51.23 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--legrand-421054--12106058

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

Legrand 421054 is a compact miniature circuit breaker designed for DIN-rail electrical distribution panels. The single-pole protective device weighs 193 g and provides overcurrent protection for residential or commercial circuits. Suitable for installation in distribution boards to protect wiring and connected equipment from short circuits and overloads.

## Long description

Legrand 421054 is a compact miniature circuit breaker designed for DIN-rail electrical distribution panels. This single-pole protective device provides overcurrent protection for residential and commercial circuits, protecting wiring and connected equipment from short circuits and overloads. The unit is engineered for integration in standard distribution boards and panels where reliable thermal-magnetic tripping characteristics are required.
Advantages
The breaker offers a compact footprint suitable for space-constrained distribution panels and straightforward DIN-rail mounting for rapid installation. Its single-pole design simplifies circuit segregation while delivering consistent overcurrent trip performance. Built by a manufacturer with established electrical product standards, the device is balanced between mechanical robustness and predictable electrical protection behavior.
Suitable for
Overcurrent protection of single-phase branch circuits in residential distribution boards
Protection of lighting and socket circuits in commercial premises
Integration into DIN-rail distribution panels and modular switchboards
Key specifications
Form factor: miniature single-pole circuit breaker
Mounting: DIN-rail compatible
Function: thermal-magnetic overcurrent protection for short-circuit and overload
Weight: approximately 193 g
Application: protection of branch circuits in residential and commercial installations
How to use
Install the device on a standard DIN rail inside the distribution board and secure wiring according to local electrical codes. Connect the incoming phase conductor to the line terminal and the load conductor to the load terminal, ensuring correct tightening torque on terminals. Verify that the breaker rating matches the circuit conductor sizing and load requirements before energizing the circuit. Test the installation by switching the breaker on and off and perform an insulation/continuity check as part of commissioning.
Usage recommendations
Use this miniature circuit breaker as part of a coordinated protection scheme: select complementary protective devices and upstream coordination to ensure reliable fault clearing. Regularly inspect terminal tightness and the surrounding enclosure for signs of overheating or damage. Follow local regulations and manufacturer guidance for selection, installation, and maintenance.

## Specifications

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.193 kg |

## FAQ

### How much does the Circuit breaker Legrand 421054 cost, and is it available for purchase?

The price is 61.99 € (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 07.07.2026 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 Legrand 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 Legrand 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, 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/12106058/67654876_large.webp