What is the inside & outside diameter ?

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.

Can these be cut into two identical half toroids? I want create two identical electromagnets.

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.

Need toroid for 1mhz thru 30 mhz

FairRite and the listing description give the following specifications: Frequency Range: 1 - 300MHz , EMI Suppression 1 - 500 MHz

Toroid Core Ft240 31 フェライト

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Description

🛠️ Elevate your signal game with precision EMI defense!

PRECISION DIMENSIONS - Optimized 2.40 in outer diameter and 1.40 in inner diameter for seamless integration.
TRUSTED BRAND QUALITY - Fair-Rite’s renowned ferrite core guarantees durability and consistent performance.
BROAD SPECTRUM SHIELDING - Engineered for 1-300 MHz frequency range to tackle diverse EMI challenges.
DIY READY BULK PACKAGING - Perfect for professionals stocking up on high-quality components without retail markup.
SUPERIOR NOISE REDUCTION - Suppresses electromagnetic interference up to 500 MHz, ensuring crystal-clear signal integrity.

The Toroid Core FT240-31 by Fair-Rite is a high-performance ferrite core designed for EMI suppression across 1 to 500 MHz frequencies. With precise dimensions (2.40 in OD, 1.40 in ID) and robust material quality, it’s ideal for professional-grade noise reduction in RF and electronic projects. Bulk packaged for serious DIYers and engineers, it’s a trusted component to enhance signal clarity and reduce interference.

Specifications

ASIN	B01959LAFA
Amazon Bestseller	#206,601 in DIY, Tools & Garden ( See Top 100 in DIY, Tools & Garden ) #2,120 in Hardware Locks
Batteries Included	No
Batteries Required?	No
Customer Reviews	4.6 4.6 out of 5 stars (409)
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

Reviews

J**E

conforme

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

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J**E

Great for noise reduction

I use this to create a common mode current balun filter on my HF ham radio to reduce the noise level and RF coming back into my radio shack. It works great on the frequencies that it's designed for and I also purchased another one (FT-240-43) for my VHF radio and they both work great. Make sure you put at least 10 turns on the coax through the toroid and you should be okay. I feel the price point is great and they appear to be high quality components.

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B**A

Un po' deluso

Acquistato per la costruzione di un balun 1:1 per eliminare le correnti di modo comune verso il trasmettitore. Anche se il balun è stato ben costruito, rispettando il giusto collegamento, il balun non funziona molto bene. Forse il toroide non è di grande qualità.

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A**I

Sehr guter Mantelwellensperre

Ausgezeichnete Mantelwellensperre zusammen mit geschirmtem USB Kabel zum PC

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J**H

Good

Works as intended

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Toroid Core FT240-31 フェライト

Description

Specifications

Reviews

Common Questions