Legrand Tx3 B40A 3-pole circuit breaker

Name: Circuit breaker Legrand Tx3 B40A 403406
Brand: Legrand
SKU: 3936915
Price: 33.49 EUR
Availability: InStock

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Circuit breaker Legrand Tx3 B40A 3-pole 6 kA 3M (B40A, 403406)

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Short description

Legrand Tx3 B40A is a three-pole miniature circuit breaker with a 40 A rated current and 6 kA breaking capacity. Designed for DIN-rail mounting (3M width), it provides overcurrent and short-circuit protection for residential and light commercial electrical circuits. Suitable for distribution boards protecting motors, lighting and general-purpose circuits.

Available for order: 17 pcs.

Warranty: 2 Years

SKU: 3936915

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Deliver the order:

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to the Customer Service Center at Kengaraga 2b, Riga

06.07.2026 {{selectedOffer.officeDeliveryString}}

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Customer service center

2b. Kengaraga str., Riga, Latvia, LV-1063

06.07.2026 {{selectedOffer.officeDeliveryString}}

free

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From 4.99 € (Weight: 1.00 kg)

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Product information

Description

Legrand Tx3 B40A is a three-pole miniature circuit breaker with a rated current of 40 A and a breaking capacity of 6 kA. Designed for DIN-rail installation with a 3-module width, this circuit breaker provides reliable overcurrent and short-circuit protection for residential and light commercial electrical installations. The device is intended for use in distribution boards to protect motors, lighting circuits and general-purpose circuits where a B-characteristic trip curve is suitable.

Advantages

The Legrand Tx3 B40A delivers selective tripping for moderate inrush currents thanks to its B-type characteristic, ensuring protection without nuisance trips for most lighting and resistive loads. Its compact 3M width saves space in distribution panels while maintaining easy DIN-rail mounting and connection. The 6 kA breaking capacity meets common installation requirements for fault clearing and contributes to safer operation of the electrical system.

Suitable for

Protection of three-phase motor circuits with low starting currents
Feeding lighting circuits in residential and small commercial premises
General-purpose three-phase circuit protection in distribution boards

Key specifications

Poles: 3-pole configuration for three-phase systems
Rated current: 40 A
Breaking capacity: 6 kA (short-circuit interrupting capability)
Trip characteristic: B-type (suitable for resistive and low-inrush loads)
Mounting: DIN-rail (EN 60715) with 3-module width

How to use

Install the circuit breaker onto a standard DIN-rail inside the distribution board and make line and load connections to the appropriate terminals, observing phase sequence and tightening torque recommended by the installation standards. Ensure the installation is carried out by a qualified electrician and that the breaker is coordinated with upstream and downstream protective devices. Verify correct operation by switching the device on and off after installation and test under controlled conditions as required by local regulations.

Usage recommendations

Use the Legrand Tx3 B40A in circuits where a B-type trip curve is appropriate and ensure that the nominal breaking capacity matches the prospective short-circuit current of the installation. Coordinate with residual current devices or upstream breakers if required, and follow installation and maintenance intervals per local electrical codes.

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Customer questions

FAQ

How much does the Legrand Tx3 B40A 3-pole circuit breaker cost, and is it available for purchase?

The price is 33.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 17 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 06.07.2026 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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

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