# Eaton STN0,4 Single-Phase Transformer 400VA 400/24V

**URL:** https://aio.lv/en/product--eaton-221514--12455287
**Data updated:** 2026-05-18 09:29 (EEST)
**Category:** Power Supplies (PSU)
**Manufacturer:** EATON
**Manufacturer code:** 221514
**EAN:** 4015082215149
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 215.99 €
**Prices and availability valid until:** 2026-07-19 23:59
**Price without VAT (21%):** 178.50 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--eaton-221514--12455287

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.99 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

The Eaton STN0,4 is a high-quality single-phase control transformer designed for industrial applications. With a power rating of 400VA and a voltage transformation ratio of 400/24V, this unit ensures reliable power supply for control circuits and automation systems. It features robust construction for long-term operational stability and safety in demanding electrical environments.

## Long description

The Eaton STN0,4 is a professional-grade single-phase control transformer engineered to provide stable and reliable power conversion for industrial control circuits and automation infrastructure. With a power rating of 400VA and a precise voltage transformation from 400V to 24V, this unit is built to maintain consistent performance in demanding electrical environments. Its robust design ensures durability and operational safety, making it an essential component for machinery and control panels requiring a steady low-voltage supply.
Advantages
This transformer stands out due to its high-quality construction, which minimizes energy losses and ensures long-term reliability even under continuous operation. The compact design allows for efficient integration into existing control cabinets, saving valuable space while maintaining high thermal stability. By providing a stable 24V output from a 400V primary source, it effectively protects sensitive control components from voltage fluctuations and ensures the seamless operation of automated systems.
Suitable for
Industrial control circuits
Automation and robotics systems
Powering low-voltage sensors and relays
Control panels for machinery
This transformer may not be suitable for applications requiring three-phase power supply or for high-power loads exceeding its 400VA rating. It is also not intended for outdoor use unless housed within a properly rated, weather-protected enclosure.
Key specifications
Power rating: 400VA
Primary voltage: 400V AC
Secondary voltage: 24V AC
Phase: Single-phase
Application: Industrial control and automation
Installation should be performed by a qualified electrician in accordance with local electrical codes. The transformer must be mounted securely within a ventilated enclosure to ensure proper heat dissipation. Connect the primary 400V input and secondary 24V output terminals according to the wiring diagram provided on the device label, ensuring all connections are tightened to the specified torque to prevent overheating.
What to consider before purchase
Verify that the 400VA power capacity meets the total load requirements of your system.
Ensure the input voltage matches your local power supply network.
Check the available space in your control cabinet for mounting dimensions.
Confirm that the secondary 24V output is compatible with your connected control devices.
Usage recommendations: Regularly inspect the terminal connections for tightness and ensure the surrounding area remains free of dust and debris to maintain optimal cooling efficiency during operation.

## FAQ

### How much does the Eaton STN0,4 Single-Phase Transformer 400VA 400/24V cost, and is it available for purchase?

The price is 215.99 € (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 13.07.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Eaton STN0,4 Single-Phase Transformer 400VA 400/24V be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 EATON 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 EATON 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/12455287/68757612_large.webp