---
title: "W5500 ferrite chip"
url: "https://maker.wiznet.io/forum/9566"
markdown_url: "https://maker.wiznet.io/forum/9566/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "kresten"
created: "2013-09-25T12:45:27+09:00"
last_activity: "2017-05-04T08:30:06+09:00"
language: "en"
views: 1065
replies: 3
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# W5500 ferrite chip

## Question

Asked by kresten on 2013-09-25 in Ethernet Chips.

Hello Wiznet

On the reference schematic there is a ferrite connected between the digital and analog VCC. The specific one that you are using seems hard to get, so i would like to know are there any speciel requirements to the ferrite ?
So that i can find a replacement.

thanks in advance

## Replies

### Reply 1 by suhwan, 2013-09-26

Dear kresten,

The ferrite connected between the digital and analog VCC could be used any ferrite Bead 120Ohm.

Thanks,
WIZnet.

### Reply 2 by kresten, 2013-09-26

Okay - thank you ![:slight_smile:](https://emoji.discourse-cdn.com/twitter/slight_smile.png?v=12)

Is there any reason it is rated 3amps?
It seems like a lot when the chip is rated ~120milliamps?

Regards

### Reply 3 by suhwan, 2013-09-26

Dear kresten,

You could be used any ferrite Bead 60~120 Ohm and ~1A. (depending to your system)

## Please, refer to Spec. of HH-1M1608-121JT, as below

## Part No. / Typ. / min. / DC Resistance (Ω) max. / Rated current (mA) max.

## HH-1M1608-121□□ / 120 / 90 / 0.14 / 1100

Thanks,
WIZnet

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Source: https://maker.wiznet.io/forum/9566