---
product_id: 733788774
title: "Toroid Core FT240-31 Ferrite"
brand: "fair-rite"
price: "218 zł"
currency: PLN
in_stock: true
reviews_count: 5
category: "Fair Rite"
url: https://www.desertcart.pl/products/733788774-toroid-core-ft240-31-ferrite
store_origin: PL
region: Poland
---

# Precise 61mm OD 1-300MHz EMI suppression Durable ferrite material Toroid Core FT240-31 Ferrite

**Brand:** fair-rite
**Price:** 218 zł
**Availability:** ✅ In Stock

## Summary

> ⚡ Elevate your circuit game with precision ferrite power!

## Quick Answers

- **What is this?** Toroid Core FT240-31 Ferrite by fair-rite
- **How much does it cost?** 218 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/733788774-toroid-core-ft240-31-ferrite)

## Best For

- fair-rite enthusiasts

## Why This Product

- Trusted fair-rite brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Bulk Ready for Pros:** Packaged in bulk to fuel your innovation without retail markup
- • **Compact & Lightweight:** Sleek 12.7mm height and just 109g for space-conscious designs
- • **Optimized EMI Defense:** Suppresses interference across 1-300MHz for crystal-clear signals
- • **Precision Engineering:** Exact 2.40-inch outer diameter ensures seamless integration
- • **Trusted Brand Quality:** Fair-Rite reliability powering your projects with consistent performance

## Overview

The FT240-31 Toroid Core by Fair-Rite is a high-quality ferrite inductor core designed for EMI suppression in the 1-300MHz frequency range. Measuring 2.40 inches in outer diameter and crafted from durable ferrite material, it offers precise dimensions and reliable performance, making it a go-to choice for professional electronics projects and advanced DIY applications.

## Description

FT240-31 Toroid Ferrite Core Fair-Rite Brand Frequency Range: 1 - 300MHz EMI Suppression 1 - 500 MHz OD = 2.40 in / 61.0 mm +/- 1.30 mm ID = 1.40 in / 35.55 mm +/- 0.5 mm Ht = 0.5 in / 12 .7 mm +/- 0.50 mm in bulk package, not in retail packaging.

Review: Parfait, mais je le garde en stock car mon projet a changé :-)
Review: It's a Toroid, it works, good price, and just what I needed. I'm happy

## Features

- Type 31

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01959LAFA |
| Amazon Bestseller | #482,374 in DIY, Tools & Garden ( See Top 100 in DIY, Tools & Garden ) #4,460 in Hardware Locks |
| Batteries Included | No |
| Batteries Required? | No |
| Customer Reviews | 4.7 4.7 out of 5 stars (403) |
| Date First Available | September 28, 2018 |
| Is Discontinued By Manufacturer | No |
| Item Dimensions LxWxH | 7.6 x 7.6 x 0.6 cm |
| Item Weight | 109 g |
| Manufacturer | Fair-Rite |
| Material | Ferrite |
| Measurement System | Metric |
| Part number | FT240-31 |
| Product Dimensions | 7.62 x 7.62 x 0.64 cm; 109 g |

## Images

![Toroid Core FT240-31 Ferrite - Image 1](https://m.media-amazon.com/images/I/31KYMVcwpXL.jpg)
![Toroid Core FT240-31 Ferrite - Image 2](https://m.media-amazon.com/images/I/31O66B6r5zL.jpg)
![Toroid Core FT240-31 Ferrite - Image 3](https://m.media-amazon.com/images/I/410uE+VY90L.jpg)
![Toroid Core FT240-31 Ferrite - Image 4](https://m.media-amazon.com/images/I/41S8mRTsHQL.jpg)
![Toroid Core FT240-31 Ferrite - Image 5](https://m.media-amazon.com/images/I/51C5ZynLm8L.jpg)

## Questions & Answers

**Q: What is the inside & outside diameter ?**
A: OD = 2.40 in / 61.0 mm +/- 1.30 mm , ID = 1.40 in / 35.55 mm +/- 0.85 mm , this is also conveniently located in the product description in the listing.

**Q: Can these be cut into two identical half toroids? I want create two identical electromagnets.**
A: Perhaps the snap-on beads would be a better application.

The toroids have a specific shape to keep the magnetic flux within the loop.  So while I can’t answer if breaking them will work in your case, but it sounds like using a hammer when you need a wrench.  Could it work?  Maybe, but bludgeoning seems a bit wasteful.  YMMV

Maybe try Mix 31 beads.

**Q: What's the difference in F240-31 and T120-31?**
A: Interior diameter.

**Q: Need toroid for 1mhz thru 30 mhz**
A: FairRite and the listing description give the following specifications: Frequency Range: 1 - 300MHz ,
 EMI Suppression 1 - 500 MHz

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by J***E on October 7, 2025*

Parfait, mais je le garde en stock car mon projet a changé :-)

### ⭐⭐⭐⭐⭐ Review
*by K***. on February 4, 2026*

It's a Toroid, it works, good price, and just what I needed. I'm happy

### ⭐⭐⭐⭐⭐ Review
*by A***C on March 24, 2025*

Took a long time to arrive but exactly what I wanted when it got here. Now in use as common mode choke for my HF set-up.

## Frequently Bought Together

- Toroid Core FT240-31 Ferrite
- Toroid Core FT240-43 Ferrite
- FT-140-43 Ferrite Toroid Core | 43 Material

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-03-17*