# Hager NDN340 3-Pole Miniature Circuit Breaker 40A 10kA D-Curve

**URL:** https://aio.lv/en/product--hager-ndn340--12455567
**Data updated:** 2026-05-18 09:32 (EEST)
**Category:** Power Sockets
**Manufacturer:** Hager
**Manufacturer code:** NDN340
**EAN:** 3250614611803
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 66.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 54.95 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hager-ndn340--12455567

## 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

The Hager NDN340 is a high-performance 3-pole miniature circuit breaker designed for reliable electrical circuit protection. Rated for 40A and 10kA breaking capacity with a D-type tripping characteristic, it is suitable for industrial and commercial applications requiring protection against short circuits and overloads. This device operates at 400V AC, ensuring safety and efficiency in electrical distribution systems.

## Long description

The Hager NDN340 is a robust 3-pole miniature circuit breaker engineered to provide dependable protection for electrical distribution systems. With a rated current of 40A and a high breaking capacity of 10kA, this device is specifically designed to handle the demanding requirements of industrial and commercial environments. It features a D-type tripping characteristic, making it ideal for circuits with high inrush currents, ensuring that the system remains safe and operational under various load conditions while effectively preventing damage from short circuits and overloads.
Advantages
This circuit breaker offers exceptional reliability and safety for complex electrical installations. Its 3-pole configuration allows for the simultaneous disconnection of three phases, providing comprehensive protection for three-phase equipment. The D-curve tripping characteristic is specifically optimized for applications involving motors, transformers, and other inductive loads that generate significant current spikes during startup. The high 10kA breaking capacity ensures that the device can safely interrupt high fault currents, minimizing the risk of fire or equipment damage in the event of a short circuit.
Suitable for
Industrial machinery and motor control centers
Commercial electrical distribution boards
Systems with high inductive loads
Protection of transformers and power supplies
When it may not be suitable
This device is not intended for residential lighting or standard household outlet circuits, as the D-curve tripping characteristic is too insensitive for these applications. Using this breaker in circuits with low inrush currents may result in a failure to trip during a fault condition, compromising safety.
Key specifications
Number of poles: 3
Rated current: 40A
Breaking capacity: 10kA
Tripping characteristic: D-curve
Operating voltage: 400V AC
How to use
The Hager NDN340 is designed for installation on a standard DIN rail within an electrical distribution cabinet. It should be installed by a qualified electrician in accordance with local electrical regulations. The device is mounted by snapping it onto the rail and securing the electrical connections to the input and output terminals. Ensure that the wire gauge used is appropriate for a 40A current rating to prevent overheating at the connection points.
What to consider before purchase
Verify that the D-curve characteristic matches the startup current requirements of your connected equipment.
Ensure the 40A rating is compatible with the total load of the circuit.
Confirm that the installation environment meets the requirements for a 400V AC system.
Usage recommendations
Regularly inspect the circuit breaker for signs of thermal damage or loose connections. It is recommended to perform periodic testing of the tripping mechanism to ensure continued operational integrity within the electrical system.

## Specifications

| Feature | Value |
|---|---|
| Quantity | 1 |
| AC input voltage | 400 |
| Compliance certificates | RoHS |

## FAQ

### How much does the Hager NDN340 3-Pole Miniature Circuit Breaker 40A cost, and is it available for purchase?

The price is 66.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 7 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 Hager 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 Hager 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

https://aio.lv/img/cache/product/12455567/68775716_large.webp