# Hager SFT340 Modular Changeover Switch 40A 3P

**URL:** https://aio.lv/en/product--hager-sft340--12470753
**Data updated:** 2026-05-18 09:35 (EEST)
**Category:** Power Sockets
**Manufacturer:** Hager
**Manufacturer code:** SFT340
**EAN:** 3250615510938
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 39.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 33.05 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hager-sft340--12470753

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

The Hager SFT340 is a 3-pole modular changeover switch designed for reliable power source switching in electrical distribution boards. Rated for 40A and 400V AC, this device ensures safe manual control between two power supplies. It is an essential component for industrial and residential electrical installations requiring robust circuit management and high operational safety standards.

## Long description

The Hager SFT340 is a high-quality 3-pole modular changeover switch engineered for seamless and reliable power source switching within electrical distribution boards. Designed to handle a rated current of 40A and an operating voltage of 400V AC, this device provides a secure manual interface for toggling between two distinct power supplies, such as a main grid and a backup generator. Its robust construction ensures consistent performance and high operational safety standards, making it a dependable choice for managing electrical circuits in both residential and industrial environments.
Advantages
The primary benefit of the Hager SFT340 is its ability to provide safe and controlled isolation between two power sources, preventing dangerous feedback or short circuits. Its modular design allows for easy installation on standard DIN rails, ensuring compatibility with most modern distribution board configurations. The switch features a clear 1-0-2 operation mode, which provides a neutral off position for added safety during maintenance or system switching. Built with high-grade materials, it offers long-term durability and resistance to the mechanical wear associated with frequent manual switching operations.
Suitable for
Residential backup power systems using generators
Commercial electrical distribution panels
Industrial machinery power management
Manual source selection in off-grid or hybrid energy setups
When it may not be suitable
This switch is not designed for automatic power transfer and requires manual intervention to change sources. It is also not suitable for applications exceeding its 40A current rating or for use in environments with extreme moisture or corrosive atmospheres without appropriate protective enclosures.
Key specifications
Number of poles: 3
Rated operational current: 40A
Rated operational voltage: 400V AC
Switching positions: 1-0-2
Mounting type: DIN rail
How to use
The Hager SFT340 should be installed by a qualified electrician within a standard electrical distribution board. Once mounted on the DIN rail, the input terminals are connected to the two power sources, and the output terminals are connected to the load circuit. To operate, simply move the front-facing toggle to position 1 to engage the first power source, position 0 to disconnect both sources, or position 2 to engage the second power source.
What to consider before purchase
Ensure the 40A rating is sufficient for your total load requirements
Verify that your distribution board has enough space for a 3-pole modular device
Confirm that the wiring configuration matches a 3-phase or 3-pole system
Check local electrical regulations regarding the installation of manual changeover switches
Usage recommendations
Always ensure the switch is in the neutral 0 position before performing any maintenance on the connected circuits. Periodically inspect the terminals for tightness to prevent overheating due to loose connections.

## Specifications

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

## FAQ

### How much does the Hager SFT340 Modular Changeover Switch cost, and is it available for purchase?

The price is 39.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 144 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 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/12470753/68788891_large.webp