---
product_id: 278061220
title: "1ea 85X55X20mm Ultra Large Transformer ferrite core 3.3''X2.2''X0.8'' Isolator Inductor ferrite Ring Cable Wires EMI Filter ferrite RF Choke ferrite Bead MnZn PC40"
brand: "hondark"
price: "€ 49.54"
currency: EUR
in_stock: true
reviews_count: 5
category: "Hondark"
url: https://www.desertcart.gr/products/278061220-1ea-85x55x20mm-ultra-large-transformer-ferrite-core-3-3x2-2x0
store_origin: GR
region: Greece
---

# 85x55x20mm ultra-large size Multi-function: transformer, isolator, RF choke MnZn PC40 material for superior EMI shielding 1ea 85X55X20mm Ultra Large Transformer ferrite core 3.3''X2.2''X0.8'' Isolator Inductor ferrite Ring Cable Wires EMI Filter ferrite RF Choke ferrite Bead MnZn PC40

**Brand:** hondark
**Price:** € 49.54
**Availability:** ✅ In Stock

## Summary

> 🛡️ Power up your circuits with noise-free confidence!

## Quick Answers

- **What is this?** 1ea 85X55X20mm Ultra Large Transformer ferrite core 3.3''X2.2''X0.8'' Isolator Inductor ferrite Ring Cable Wires EMI Filter ferrite RF Choke ferrite Bead MnZn PC40 by hondark
- **How much does it cost?** € 49.54 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/278061220-1ea-85x55x20mm-ultra-large-transformer-ferrite-core-3-3x2-2x0)

## Best For

- hondark enthusiasts

## Why This Product

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

## Key Features

- • **Versatile Multi-Role Design:** Functions as transformer, isolator, and RF choke in one sleek component
- • **Premium MnZn PC40 Composition:** Delivers top-tier EMI filtering to keep your devices interference-free
- • **Plug-and-Play Noise Elimination:** Easily wraps around cables to banish RF feedback and signal disruptions
- • **Trusted by Pros & Hobbyists Alike:** 4.5-star rated solution for clean, reliable electronics performance
- • **Massive 3.3'' x 2.2'' x 0.8'' Ferrite Core:** Engineered for high-power noise suppression and signal integrity

## Overview

The Hondark T85X55X20 Ultra Large Transformer Ferrite Core is a high-performance MnZn PC40 ferrite ring designed to suppress EMI and RF interference. Measuring 85x55x20mm, it serves as a transformer, isolator, and RF choke, making it ideal for professional-grade noise filtering in electronics and cable wiring applications.

## Description

large power transformer ferrite core /isolator ferrite ring /cable wires noise cancel ferrite /RF choke ferrite bead

Review: Easy to use RF Choke - Was having issues with my 40m Hamstick giving feedback to my car's speakers (even with the car off) so I bought this RF choke, wrapped my Hamstick base's coax around it about 8 times and, voila, the RF feedback is gone.
Review: Works like a charm - We installed led lights in our meeting room at church which cause the remote control for our projector to be almost unusable (we had to turn off the lights nearest the projector and still it only worked 50% of the time from 6 ft). After installing this we can use the remote with all the lights on and there no problem. We could use the remote from up to 20 ft from the projector with out a hitch. To install just run your power cord of your device though the center and wrap it around the toroid twice.

## Features

- 1.Model:Transformer ferrite core /isolator ferrite ring /RF choke ferrite bead
- 2.Part number :T85X55X20
- 3.Size:OD=85mm/3.3'' ID=55mm/2.2'' T=20mm/0.8''
- 4.Material: MnZn PC40

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07PDMWN57 |
| Brand | Hondark |
| Brand Name | Hondark |
| Customer Reviews | 4.5 out of 5 stars 77 Reviews |
| Item Dimensions D x W x H | 2D x 5.5W x 2H centimeters |
| Item Weight | 0.33 Kilograms |
| Item weight | 0.33 Kilograms |
| Manufacturer | Hondark HK Limited |
| Model | T85X55X20 |
| Mounting Type | PCB Mount |
| Mounting type | PCB Mount |
| Part Number | 832 |
| Power Source | Corded Electric |
| Power source | Corded Electric |
| Product dimensions | 2D x 5.5W x 2H centimeters |
| Specification Met | EMI |
| Specification met | EMI |
| UPC | 303621183757 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Hondark
- **Power source:** Corded Electric
- **Mounting type:** PCB Mount
- **Specification met:** EMI
- **Item weight:** 0.33 Kilograms

## Images

![1ea 85X55X20mm Ultra Large Transformer ferrite core 3.3''X2.2''X0.8'' Isolator Inductor ferrite Ring Cable Wires EMI Filter ferrite RF Choke ferrite Bead MnZn PC40 - Image 1](https://m.media-amazon.com/images/I/51oo+94wn3L.jpg)

## Questions & Answers

**Q: is it toroidal? or ring?**
A: IIt is a toroid core

**Q: Do you have a spec sheet for this item? in particular i would like to know the  bsat, al and ae of this toriod. thanks.**
A: exist concerned data ,if you need the complete datasheet ,have to send you next Monday .

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy to use RF Choke
*by M***R on 26 December 2024*

Was having issues with my 40m Hamstick giving feedback to my car's speakers (even with the car off) so I bought this RF choke, wrapped my Hamstick base's coax around it about 8 times and, voila, the RF feedback is gone.

### ⭐⭐⭐⭐⭐ Works like a charm
*by J***R on 7 November 2022*

We installed led lights in our meeting room at church which cause the remote control for our projector to be almost unusable (we had to turn off the lights nearest the projector and still it only worked 50% of the time from 6 ft). After installing this we can use the remote with all the lights on and there no problem. We could use the remote from up to 20 ft from the projector with out a hitch. To install just run your power cord of your device though the center and wrap it around the toroid twice.

### ⭐⭐⭐⭐⭐ Largest Ferrite Ring I found
*by A***O on 10 April 2024*

The price was great and the size was the biggest I could find. I bought them to use in an electromagnetic experiment. I am very happy with them.

## Frequently Bought Together

- 1ea 85X55X20mm Toroidal Transformer Core 3.3X2.2X0.8 inch Toroid Inductor Ferrite Core Filter Ferrite Ring Chokes Ferrite Bead MnZn PC40
- 1ea 118X80X20mm 4.6X3.15X0.8inch Toroidal Transformer Core Toroid Ferrite Core Ferrite Chokes Ferrite Bead Ferrite Snap MnZn PC40
- Taigoehua 5pcs 42X24X16mm Toroid Core,Ferrite Rings Toroid Core Iron (Black)

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-09-11*