--- product_id: 777241019 title: "Toroid Core FT240-43 Ferrite" brand: "fair-rite" price: "€ 72.46" currency: EUR in_stock: true reviews_count: 6 category: "Fair Rite" url: https://www.desertcart.es/products/777241019-toroid-core-ft240-43-ferrite store_origin: ES region: Spain --- # High inductance: AL=1075 ±20% Precise dimensions: OD 61mm ±1.3mm Wide frequency range: 5-500 MHz Toroid Core FT240-43 Ferrite **Brand:** fair-rite **Price:** € 72.46 **Availability:** ✅ In Stock ## Summary > ⚙️ Elevate your electromagnetic game with precision and power! ## Quick Answers - **What is this?** Toroid Core FT240-43 Ferrite by fair-rite - **How much does it cost?** € 72.46 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/777241019-toroid-core-ft240-43-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 - • **Robust Ferrite Material:** Durable construction for long-lasting electromagnetic interference mitigation - • **Trusted Industry Standard:** Preferred choice for professionals tackling complex signal integrity challenges - • **Broad Frequency Compatibility:** Optimized for transformers and RFI suppression from 5 to 500 MHz - • **Superior Inductance Stability:** Consistent AL value guarantees reliable performance under varying conditions - • **Precision Engineered Dimensions:** Ensures seamless integration with your custom coil designs ## Overview The Toroid Core FT240-43 Ferrite by FAIR-RITE is a high-performance ferrite core designed for wideband transformers, power transformers, and RFI suppression applications spanning 5 to 500 MHz. With precise dimensions (61mm OD, 35.5mm ID, 12.7mm height) and a stable inductance factor (AL=1075 ±20%), it delivers reliable electromagnetic interference control. Lightweight (118g) and crafted from premium ferrite material, it’s a trusted component for engineers and professionals seeking effective noise reduction and signal integrity in demanding environments. ## Description FT240-43 Troid Ferrite Core Fairlight Blan, d AL=1075 Plus or Negative 20%, uH=(AL x turn) / 1000 Wide Band, Transformers 5-400 MHz, Power Transformers 0.5-30 MHz, RFI Suppression 5-500 0 MHz, OD 2 .40 in. / 61.0 mm Plus minus 1.30 mm, ID = 1.40 inch / 35.55 mm plus minus 0.85 mm, Ht = 0.50 inch / 12.7 mm plus minus 0.50 mm from bulk package. Review: ここを見ている人には既知と思いますが、電線を巻いてコイルを作りコモン・モード フィルターにしたり電波障害対策に使用するものです。当局の環境においては確かに効果アリでした。確実に対策するためには何かと何かを結ぶ全ての配線に多数使用する方がよく、現在11個使用中。 ここで注文すると米国からの取り寄せとなり時間がかかります。中古品が多数出回っておりもっと安価に入出できるルートもありますが測定器がなければ外見で粗悪品かどうか判断できないものですから、必要な費用は惜しまないという人にはお薦めです。 Review: El producto llego en buenas condiciones, despues de construir el transformador funiona a la perfeccion gracias desertcart. ## Features - FT240-43 - Ferrite ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0178IA3XU | | Amazon Bestseller | #157,488 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #73 in Electronic Ferrites | | Batteries Included | No | | Batteries Required? | No | | Color | red - 500 | | Customer Reviews | 4.6 4.6 out of 5 stars (415) | | Date First Available | December 23, 2016 | | Is Discontinued By Manufacturer | No | | Item Dimensions LxWxH | 7.6 x 2.5 x 7.6 cm | | Item Weight | 118 g | | Manufacturer | FAIR-RITE | | Material | Ferrite | | Measurement System | Metric | | Noise Level | 30 Decibels | | Part number | FT240-43 | | Product Dimensions | 7.62 x 2.54 x 7.62 cm; 118 g | | Size | m-500 | ## Images ![Toroid Core FT240-43 Ferrite - Image 1](https://m.media-amazon.com/images/I/51O2dNGYN+L.jpg) ![Toroid Core FT240-43 Ferrite - Image 2](https://m.media-amazon.com/images/I/71UoCTEFrML.jpg) ![Toroid Core FT240-43 Ferrite - Image 3](https://m.media-amazon.com/images/I/51kXAhKSMjL.jpg) ![Toroid Core FT240-43 Ferrite - Image 4](https://m.media-amazon.com/images/I/61JpufZiS-L.jpg) ![Toroid Core FT240-43 Ferrite - Image 5](https://m.media-amazon.com/images/I/61EdXU6FK4L.jpg) ## Questions & Answers **Q: What is the max wattage these are rated for. i want to build an unun for an end fed antenna that will handle 600 watts. will 1 or more handle amount?** A: You should use 2 for 600 watts, the highest rating I have seen for only one is 400 watts. Based on commercial models of end-fed ununs. **Q: I would like to use this on the 11-meters cb band (26.965 - 27.405) will this help to cut down rf returning to the radio?** A: how many watts? 4 watts isn’t anything to worry about but 500+ watts certainly would be. and yes, wound as a 1:1 choke (or they also call them current baluns) it will absolutely lessen common mode current coming back down the coax. coax coils (mentioned in other responses) are not nearly as effective as a 240-31 ferrite core wrapped as a 1:1 current choke. google “1:1 current balun” or “1:1 current choke” and you will see many examples to guide you. balun btw simply means balanced and unbalanced and they are used to rectify the impedance mis-match between the antenna and the 50 ohm coaxial cable. that generally involves lowering the high impedance of an antenna (200-3000 ohms depending on design) and even then, it should be referred to as a step down transformer but balun (balanced / unbalanced) has become the default term. **Q: Will this work to reduce/remove static noise on a regular FM radio produced from cheap led lighting in a garage?** A: It likely would with a couple of ifs. It is really large for such a task. The toroidal core would need to be placed as close to the LED power source as possible. Is the FM radio itself close to the LED lighting? **Q: Will this block interference from a treadmill motor? Ethernet over powerline is degraded whenever the treadmill is on.** A: ethernet over power line is destroying the shortwave radio frequencies , you should run a real cat-5/6 cable or use 5gig wireless.... and you would only need type 73 core for anything the treadmill is hashing out on the airwaves. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by レ***止 on May 12, 2022* ここを見ている人には既知と思いますが、電線を巻いてコイルを作りコモン・モード フィルターにしたり電波障害対策に使用するものです。当局の環境においては確かに効果アリでした。確実に対策するためには何かと何かを結ぶ全ての配線に多数使用する方がよく、現在11個使用中。 ここで注文すると米国からの取り寄せとなり時間がかかります。中古品が多数出回っておりもっと安価に入出できるルートもありますが測定器がなければ外見で粗悪品かどうか判断できないものですから、必要な費用は惜しまないという人にはお薦めです。 ### ⭐⭐⭐⭐⭐ Review *by S***. on August 28, 2024* El producto llego en buenas condiciones, despues de construir el transformador funiona a la perfeccion gracias Amazon. ### ⭐⭐⭐⭐⭐ Review *by K***. on February 4, 2026* It's a Toroid, it works, good price, I'm happy ## Frequently Bought Together - Toroid Core FT240-43 Ferrite - Toroid Core FT240-31 Ferrite - FT-140-43 Ferrite Toroid Core | 43 Material --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.es/products/777241019-toroid-core-ft240-43-ferrite](https://www.desertcart.es/products/777241019-toroid-core-ft240-43-ferrite) --- *Product available on Desertcart Spain* *Store origin: ES* *Last updated: 2026-05-19*