# FF TO-400-5 Split-Core Current Transformer 400/5A Class 0.5

**URL:** https://aio.lv/en/product--ff-to-400-5--12465038
**Data updated:** 2026-05-18 09:31 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** FF
**Manufacturer code:** TO-400-5
**EAN:** 5908312590880
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 84.99 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 70.24 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-to-400-5--12465038

## 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 FF TO-400-5 is a split-core current transformer designed for precise electrical measurements. With a transformation ratio of 400/5A and accuracy class 0.5, it is ideal for energy monitoring and power management systems. The split-core design allows for easy installation on existing cables without disconnecting the circuit, making it a practical solution for industrial and commercial electrical infrastructure.

## Long description

The FF TO-400-5 is a high-precision split-core current transformer engineered for reliable electrical monitoring and energy management. Featuring a transformation ratio of 400/5A and an accuracy class of 0.5, this device provides accurate data for power analysis in various electrical systems. Its split-core design is specifically developed to facilitate installation on existing cables, eliminating the need to disconnect or interrupt the primary circuit during setup.
Advantages
The primary benefit of the FF TO-400-5 is its non-invasive installation process, which significantly reduces downtime and labor costs in industrial or commercial environments. The split-core mechanism allows the transformer to be clamped directly onto conductors, making it an ideal choice for retrofitting existing electrical panels where space is limited and circuit interruption is not feasible. Furthermore, the high accuracy class ensures that energy consumption data remains precise, supporting effective power management and billing applications.
Suitable for
Energy monitoring systems
Power management and analysis
Industrial electrical infrastructure
Commercial building energy audits
Retrofitting existing electrical installations
This transformer may not be suitable for high-voltage applications exceeding its rated insulation levels or for environments with extreme electromagnetic interference that could compromise the accuracy of the 0.5 class rating. It is also not intended for use in circuits where the primary current consistently exceeds the rated 400A capacity.
Key specifications
Transformation ratio: 400/5A
Accuracy class: 0.5
Core type: Split-core
Application: Current measurement
To use the FF TO-400-5, ensure the primary circuit is de-energized if safety protocols require it, although the design allows for installation on live cables by qualified personnel. Open the split-core housing, place the transformer around the conductor, and securely close the latch until it clicks. Connect the secondary output terminals to your measuring instrument or power meter, ensuring the wiring is secure and correctly polarized according to your monitoring device requirements.
What to consider before purchase
Verify that the primary current does not exceed 400A
Ensure the secondary input of your meter is compatible with a 5A output
Check the physical dimensions of the conductor to ensure it fits within the transformer aperture
Confirm the accuracy requirements of your specific application
For optimal performance and safety, ensure all secondary connections are tightened properly and that the transformer is installed in a clean, dry environment away from excessive heat sources.

## FAQ

### How much does the FF TO-400-5 Split-Core Current Transformer 400/5A cost, and is it available for purchase?

The price is 84.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 23 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 FF TO-400-5 Split-Core Current Transformer 400/5A 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 FF 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 FF 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/12465038/68766644_large.webp