---
product_id: 585847616
title: "Amidon FT240-43 FT-240-43 Ferrite Toroid Core 43 Material"
brand: "amidon"
price: "¥10841"
currency: JPY
in_stock: true
category: "Amidon"
url: https://www.desertcart.jp/products/585847616-amidon-ft240-43-ft-240-43-ferrite-toroid-core-43
store_origin: JP
region: Japan
---

# Wide frequency range 5-500 MHz 2.4 inch OD precision High AL value 1075 ±20% Amidon FT240-43 FT-240-43 Ferrite Toroid Core 43 Material

**Brand:** amidon
**Price:** ¥10841
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your projects with precision and speed!

## Quick Answers

- **What is this?** Amidon FT240-43 FT-240-43 Ferrite Toroid Core 43 Material by amidon
- **How much does it cost?** ¥10841 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/585847616-amidon-ft240-43-ft-240-43-ferrite-toroid-core-43)

## Best For

- amidon enthusiasts

## Why This Product

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

## Key Features

- • **Fast Shipping from USA:** Get your components quickly with reliable California-based fulfillment, minimizing project downtime
- • **Robust Ferrite Material:** Material 43 composition optimized for low loss and high Q factor in demanding electronic applications
- • **High Magnetic Permeability:** AL value of 1075 ±20% delivers superior inductance for efficient power and signal management
- • **Precision Engineered Dimensions:** 2.4 inch outer diameter ensures consistent, reliable performance in your circuits
- • **Versatile Frequency Compatibility:** Operates seamlessly from 5 MHz up to 500 MHz, perfect for wideband transformers and RFI suppression

## Overview

The Amidon FT-240-43 Ferrite Toroid Core is a 2.4-inch diameter, high-permeability core designed for wideband transformers, power transformers, and RFI suppression across 5 to 500 MHz. With a high AL value of 1075 ±20%, it ensures efficient inductance and low loss, making it a top choice for professional electronics applications. Ships fast from California for quick project turnaround.

## Description

1 x FT-240-43 | FT240-43 Ferrite Toroid Core OD(A) = 2.40 in / 61.0 mm +/- 1.30 mm ID(B) = 1.40 in / 35.55 mm +/- 0.85 mm Ht(C) = 0.50 in / 12.7 mm +/- 0.50 mmAL=1075 +/- 20 % uH=(AL*Turns2)/1000 Actual measured AL using 10 turns #28 wire Application Freq Range Wideband Transformers 5 - 400 MHz Power Transformers 0.5 - 30 MHz RFI Suppression 5 - 500 MHz Ships Fast from California, USA

## Features

- FT-240-43
- FT240-43
- Amidon
- Ferrite Toroid Core
- Large Toroid Core 2.4 inches

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07Y6NQRGF |
| Best Sellers Rank | 127,540 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 127 in Ferrite Cores |
| Guaranteed software updates until | unknown |
| Manufacturer | Amidon |
| Manufacturer reference | FT-240-43 |
| Package Dimensions | 10.21 x 6.6 x 1.7 cm; 118 g |

## Images

![Amidon FT240-43 FT-240-43 Ferrite Toroid Core 43 Material - Image 1](https://m.media-amazon.com/images/I/31kaTAxchqL.jpg)

## Questions & Answers

**Q: Are the north and south poles, axially (top and bottom) or diametrically (side to side)?**
A: Your question indicates that you assume this product is a magnet.  This product is not a magnet.  It is a ferrite core used to construct impedance matching transformers by winding wires repeatedly through the center and tightly wrapped around the edges of core.

**Q: works for dash cam radio interference???**
A: You can use the clip on type for that as well. Get good ones, not unknown cheap chinese.

**Q: Would this help with noise on AM radio? Wrap the antenna wire around and through this?**
A: If the antenna wire is just that a wire then you will only decrease the signal and the noise.  Find the source of the noise.  LED lights, wall plug-in power sources, or other electrical appliances.  If you find the source then maybe using  snap on ferrite cores.  They see these on Amazon also.  I found a source for my AM noise was a power supply for a blue tooth adapter I had.  After unplugging this the noise went away.  If you shield the antenna as using coax and running an outside antenna wire to get away from the noise that might work also, but that depending where you live might not be possible.

**Q: what is the dimater of the inner hole?**
A: I don't have an ID micrometer handy but an eyeball guess with a desk ruler is about 1 3/8 inch. If you need something more precise or in metric, I can figure that tomorrow.

## Frequently Bought Together

- FT-240-43 FT240-43 Ferrite Toroid Core 43 Material
- BNTECHGO 16 AWG Magnet Wire - Enameled Copper Wire - Enameled Magnet Winding Wire - 4 oz - 0.0492" Diameter 1 Spool Coil Red Temperature Rating 155℃ Widely Used for Transformers Inductors
- FT-140-43 Ferrite Toroid Core | 43 Material

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**Shop now:** [https://www.desertcart.jp/products/585847616-amidon-ft240-43-ft-240-43-ferrite-toroid-core-43](https://www.desertcart.jp/products/585847616-amidon-ft240-43-ft-240-43-ferrite-toroid-core-43)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-10*