---
title: "RB1-125BAG1A MAGJACK for W5500?"
url: "https://maker.wiznet.io/forum/10483"
markdown_url: "https://maker.wiznet.io/forum/10483/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "peterjak"
created: "2014-08-29T09:25:42+09:00"
last_activity: "2017-05-04T08:33:44+09:00"
language: "en"
views: 2237
replies: 2
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# RB1-125BAG1A MAGJACK for W5500?

## Question

Asked by peterjak on 2014-08-29 in Ethernet Chips.

I have a new product design for the W5500 but I have trouble sourcing the recommended magjacks but I see that Digikey have plenty of stock of the RB1-125BAG1A from WIZnet. I can check the data although there is only an “approval sheet” but do you know if this one suitable for use with the W5500?
![](https://maker.wiznet.io/forum_uploads/wiznet/original/1X/04ea34c170040cf7394910f93972b0d9fc1c5aa0.png)

## Replies

### Reply 1 by hjjeon0608, 2014-08-31

Hi,

The schematics of RB1-1D5B8K1A and RB1-125BAG1A are look like same.
So, it would be worked fine.

Thanks.

### Reply 2 by peterjak, 2014-09-01

Yes, but I wonder what was so different that WIZnet would use another type in the first place? I will have to look closer to make sure. However, now that I have put the W5500 into the same form-factor as the WIZ820io I will now be needing an SMD version, and boy, are they harder to get a more expensive. But I will keep looking, maybe external magnetics will be the answer.

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Source: https://maker.wiznet.io/forum/10483