---
product_id: 444112500
title: "Toroid Core FT240-31 Ferrite"
brand: "fair-rite"
price: "₨769"
currency: SCR
in_stock: true
url: https://www.desertcart.sc/products/444112500-toroid-core-ft240-31-ferrite
store_origin: SC
region: Seychelles
---

# Precise 2.40 in outer diameter 1-300 MHz frequency range EMI suppression up to 500 MHz Toroid Core FT240-31 Ferrite

**Brand:** fair-rite
**Price:** ₨769
**Availability:** ✅ In Stock

## Summary

> 🛠️ Power your projects with precision and protection!

## Quick Answers

- **What is this?** Toroid Core FT240-31 Ferrite by fair-rite
- **How much does it cost?** ₨769 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/444112500-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

- • **Compact & Lightweight:** Only 109g with slim 0.50 in height, perfect for sleek designs
- • **Precision Engineering:** Exact 2.40 in OD and 1.40 in ID for seamless integration
- • **Superior EMI Shielding:** Suppresses interference up to 500 MHz, keeping your circuits clean
- • **Broad Frequency Mastery:** Covers 1-300 MHz for versatile EMI control
- • **Trusted American Craftsmanship:** Made in the USA by Fair-Rite, a leader in ferrite technology

## Overview

The Toroid Core FT240-31 Ferrite by Fair-Rite is a high-performance passive component designed for EMI suppression across a broad frequency range of 1 to 500 MHz. With precise dimensions (2.40 in OD, 1.40 in ID, 0.50 in height) and lightweight construction (109g), it ensures reliable integration into professional electronic assemblies. Proudly made in the USA, this core is ideal for engineers seeking superior interference control and durability.

## Description

One 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 +/- 0.85 mm Ht = 0.50 in / 12.7 mm +/- 0.50 mm From bulk packaging, not in retail packaging

## Features

- Type 31

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | FAIR-RITE |
| Manufacturer | Fair-Rite |
| Country of Origin | USA |
| Number of Memory Sticks | 1 |
| Item Weight | 109 g |
| Product Dimensions | 7.62 x 7.62 x 0.64 cm; 109 g |
| Item part number | FT240-31 |
| Item Height | 0.25 Inches |
| Item Width | 3 Inches |
| Are batteries included? | No |

## Images

![Toroid Core FT240-31 Ferrite - Image 1](https://m.media-amazon.com/images/I/51C5ZynLm8L.jpg)
![Toroid Core FT240-31 Ferrite - Image 2](https://m.media-amazon.com/images/I/51FuCeQt+AL.jpg)
![Toroid Core FT240-31 Ferrite - Image 3](https://m.media-amazon.com/images/I/71AhGSTHrxL.jpg)
![Toroid Core FT240-31 Ferrite - Image 4](https://m.media-amazon.com/images/I/81AqQXEUpeL.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

## 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 Seychelles*
*Store origin: SC*
*Last updated: 2026-03-14*