# FF TOM-400-5 Miniature Split-Core Current Transformer 400/5A 1.5VA

**URL:** https://aio.lv/en/product--ff-tom-400-5--12452671
**Data updated:** 2026-05-18 02:50 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** FF
**Manufacturer code:** TOM-400-5
**EAN:** 5902431674124
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 53.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 44.62 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-tom-400-5--12452671

## 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 FF TOM-400-5 is a miniature split-core current transformer designed for precise current measurement in electrical systems. With a 400/5A transformation ratio and 1.5VA accuracy, its split-core design allows for easy installation on existing cables without disconnecting circuits. Ideal for energy monitoring, sub-metering, and industrial automation applications where space is limited and non-invasive installation is required.

## Long description

The FF TOM-400-5 is a miniature split-core current transformer engineered for accurate current monitoring in electrical installations. Featuring a transformation ratio of 400/5A and a power rating of 1.5VA, this device is specifically designed to facilitate non-invasive current measurement. Its compact split-core architecture enables technicians to install the sensor directly onto existing cables without the need to disconnect or interrupt the primary circuit, making it an efficient solution for retrofitting and maintenance tasks.
Advantages
The primary benefit of the FF TOM-400-5 lies in its split-core design, which significantly reduces installation time and labor costs by eliminating the need for circuit shutdowns. Its miniature form factor is ideal for integration into crowded electrical panels or enclosures where space is at a premium. Furthermore, the device provides reliable and precise measurement data, ensuring consistent performance for energy management and monitoring systems while maintaining high safety standards during operation.
Suitable for
Energy monitoring and sub-metering systems
Industrial automation and control processes
Retrofitting existing electrical installations
Load management and power distribution monitoring
When it may not be suitable
This transformer is not intended for use in high-voltage power transmission lines or environments exceeding its specified current and power ratings. It is also not suitable for applications requiring permanent, high-precision laboratory-grade calibration where a solid-core transformer might offer slightly lower phase shift characteristics.
Key specifications
Transformation ratio: 400/5A
Power rating: 1.5VA
Design: Split-core (openable)
Application: Miniature current measurement
How to use
To install the FF TOM-400-5, open the split-core housing by releasing the locking mechanism. Place the transformer around the primary conductor that needs to be monitored. Ensure the core surfaces are clean and free of debris before snapping the housing shut securely. Once closed, connect the secondary output terminals to your measuring device, such as a power meter or data logger, ensuring the polarity is correct for accurate readings.
What to consider before purchase
Verify that the primary current does not exceed 400A
Ensure the secondary input of your measuring device is compatible with a 5A signal
Check the physical dimensions of the cable to ensure it fits within the transformer aperture
Confirm the required accuracy class for your specific monitoring application
Usage recommendations
Always ensure that the secondary circuit is connected to a load or shorted before energizing the primary conductor to prevent dangerous voltage build-up. Follow all local electrical safety regulations during installation.

## FAQ

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

The price is 53.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 28 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 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/12452671/68755259_large.webp