# Eaton STI0,4 Isolation Transformer 400V to 230V

**URL:** https://aio.lv/en/product--eaton-046640--12464312
**Data updated:** 2026-05-18 09:29 (EEST)
**Category:** Power Supplies (PSU)
**Manufacturer:** EATON
**Manufacturer code:** 046640
**EAN:** 4015080466406
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 235.99 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 195.03 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--eaton-046640--12464312

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

The Eaton STI0,4 is a single-phase isolation transformer designed for reliable voltage conversion. It features an AC input voltage of 400 V and an AC output voltage of 230 V, operating at a frequency of 50-60 Hz. This transformer is engineered for industrial and commercial applications requiring galvanic isolation and stable power supply, ensuring safety and performance in various electrical systems.

## Long description

The Eaton STI0,4 is a high-quality single-phase isolation transformer engineered for precise voltage conversion from 400V to 230V. Designed for industrial and commercial environments, this unit provides essential galvanic isolation, which enhances safety by decoupling the output circuit from the input power source. Its robust construction and adherence to international standards ensure reliable performance and stable power delivery for sensitive electrical equipment.
Advantages
This transformer offers significant benefits in terms of operational safety and electrical stability. By providing galvanic isolation, it effectively protects connected devices from voltage spikes and interference originating from the main power grid. The unit is built to withstand demanding conditions, featuring a durable design that supports both continuous operation and short-time power requirements. Its compact dimensions allow for efficient integration into control panels and electrical cabinets where space is limited.
Suitable for
Industrial control systems
Commercial power distribution
Galvanic isolation of sensitive electronic equipment
Voltage conversion in machinery
When it may not be suitable
This transformer is not intended for outdoor use without an appropriate protective enclosure, as it has an IP00 degree of protection. It is also not suitable for applications requiring three-phase power conversion or for loads exceeding its rated power capacity of 0.4 kVA.
Key specifications
Rated power: 0.4 kVA
Short-time rating: 1.1 kVA
Input voltage: 400V (+/- 5%)
Output voltage: 230V
Frequency: 50-60 Hz
Degree of protection: IP00
Dimensions: 121 mm x 100 mm x 131 mm
How to use
Installation should be performed by a qualified electrician in accordance with local electrical regulations and the provided technical documentation. The transformer must be mounted within a suitable protective housing or electrical cabinet to ensure safety, given its IP00 rating. Connect the 400V input supply to the primary terminals and the 230V load to the secondary terminals, ensuring that all connections are secure and properly tightened. Verify that the input voltage is within the specified tolerance range before energizing the system.
What to consider before purchase
Ensure the total power consumption of your connected devices does not exceed the 0.4 kVA continuous rating.
Confirm that the installation environment provides the necessary protection against dust and moisture.
Check that the available mounting space accommodates the physical dimensions of the unit.
Usage recommendations
Always verify that the input voltage matches the transformer's rated input before connection. Ensure adequate ventilation around the unit to prevent overheating during operation.

## Specifications

| Feature | Value |
|---|---|
| Load capacity | 400 VA |
| Short circuit protection | No |
| International Protection (IP) code | IP00 |
| AC output voltage | 230 |

### Power

| Feature | Value |
|---|---|
| AC input frequency | 50 - 60 |
| AC input voltage | 400 |

### Certificates

| Feature | Value |
|---|---|
| Certification | UL 506; UL5085-1; UL 5085-2; CSA-C22.2 No. 66; CSA-C22.2 No. 66.1-06; CSA-C22.2 No. 66.2-06; IEC/EN 61558-2-2; CE |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 5.2 kg |
| Height | 131 mm |
| Width | 121 mm |
| Depth | 100 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating temperature (T-T) | -25 - 40 |

### Other features

| Feature | Value |
|---|---|
| Housing colour | Metallic |

## FAQ

### How much does the Eaton STI0,4 Isolation Transformer 400V/230V cost, and is it available for purchase?

The price is 235.99 € (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 08.07.2026 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 STI0,4 Isolation Transformer 400V/230V 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for Eaton STI0,4 Isolation Transformer 400V/230V?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/12464312/68767503_large.webp