# Residual current circuit breaker 4P 40 A 30 mA Type AC Legrand RX3 402063

**URL:** https://aio.lv/en/product--legrand-402063--12085117
**Data updated:** 2026-03-20 09:51 (EET)
**Category:** Power Sockets
**Manufacturer:** Legrand
**Manufacturer code:** 402063
**EAN:** 3245064020633
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 45.49 €
**Prices and availability valid until:** 2026-08-04 23:59
**Price without VAT (21%):** 37.60 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--legrand-402063--12085117

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

Legrand RX3 402063 is a 4-pole residual current circuit breaker (RCCB) rated 40 A with a 30 mA sensitivity, type AC. It detects AC sinusoidal leakage currents and disconnects the supply to protect against electric shock and fire risk. Suitable for residential and light commercial installations, it mounts in DIN‑rail distribution boards for circuit protection.

## Long description

Legrand RX3 402063 is a 4-pole residual current circuit breaker (RCCB) rated 40 A with 30 mA sensitivity, Type AC. Designed for installation on DIN-rail distribution boards, this device monitors alternating sinusoidal leakage currents and quickly disconnects the supply when imbalance is detected to reduce the risk of electric shock and fire. The compact form factor and clear switching mechanism make it suitable for residential and light commercial electrical installations where selective earth-leakage protection of circuits is required.
Advantages
The RX3 402063 provides reliable residual current detection for single- and three-phase circuits with neutral. Its 30 mA sensitivity offers protection against hazardous touch voltages while the 4-pole configuration ensures simultaneous disconnection of all poles for safe isolation. The breaker is designed for standard DIN-rail mounting and offers a simple manual test function to verify operation. The device's rated current of 40 A supports common circuit loads found in homes and small businesses.
Suitable for
Residential distribution boards protecting general lighting and socket circuits
Small commercial premises requiring basic earth-leakage protection
Three-phase installations where simultaneous neutral disconnection is needed
Retrofit or new installations on standard DIN-rail panels
Key specifications
Poles: 4 (three-phase + neutral)
Rated current: 40 A
Residual operating current (sensitivity): 30 mA
Response type: AC (detects alternating sinusoidal leakage currents)
Mounting: DIN-rail
Manual test function: built-in test button
How to use
Install the RCCB on a compatible DIN-rail inside the distribution board, ensuring correct connection of phase and neutral conductors according to the wiring diagram and applicable electrical standards. After wiring, perform the manual test by pressing the test button to confirm the device trips and resets properly; this verifies residual current detection functionality. Use the device as the main protective element for circuits requiring earth-leakage protection and combine it with overcurrent protection devices where necessary.
Usage recommendations
Perform the manual test periodically (for example, monthly) and follow local electrical codes when selecting upstream overcurrent protection and when sizing conductors. Ensure installation and maintenance are carried out by a qualified electrician to guarantee correct operation and safety.

## FAQ

### How much does the RCCB 4P 40A 30mA Legrand RX3 402063 cost, and is it available for purchase?

The price is 45.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 340 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 23.07.2026 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

## Image

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