# Importance of Network Transformers in Ethernet Connections

**URL:** https://sierraconnect.protoexpress.com/t/importance-of-network-transformers-in-ethernet-connections/1135
**Category:** General
**Created:** [February 22, 2024, 2:38pm UTC](https://sierraconnect.protoexpress.com/t/importance-of-network-transformers-in-ethernet-connections/1135 "2024-02-22T14:38:59Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![Henry](https://avatars.discourse-cdn.com/v4/letter/h/df705f/32.png) [@Henry](https://sierraconnect.protoexpress.com/u/Henry)
#### Post date: [February 22, 2024, 2:38pm UTC](https://sierraconnect.protoexpress.com/t/importance-of-network-transformers-in-ethernet-connections/1135/1 "2024-02-22T14:38:59Z")

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Why are network transformers used in Ethernet connections? Why is it so important?

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### Author: ![jerrysaitter](https://avatars.discourse-cdn.com/v4/letter/j/c68b51/32.png) [@jerrysaitter](https://sierraconnect.protoexpress.com/u/jerrysaitter)
#### Post date: [February 22, 2024, 6:05pm UTC](https://sierraconnect.protoexpress.com/t/importance-of-network-transformers-in-ethernet-connections/1135/2 "2024-02-22T18:05:22Z")

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Network transformers provide electrical isolation, impedance matching, common mode rejection, DC isolation, preserve SI, etc. This contributes to the reliable and efficient transmission of data over Ethernet networks.

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### Author: ![myrtlee](https://avatars.discourse-cdn.com/v4/letter/m/3bc359/32.png) [@myrtlee](https://sierraconnect.protoexpress.com/u/myrtlee)
#### Post date: [February 23, 2024, 4:30pm UTC](https://sierraconnect.protoexpress.com/t/importance-of-network-transformers-in-ethernet-connections/1135/3 "2024-02-23T16:30:04Z")

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Spot on. Just to add a bit, the electrical isolation aspect is crucial for preventing ground loops and potential differences. This helps in reducing interference and enhancing signal integrity. The impedance matching ensures optimal power transfer between network components. Also, the common mode rejection plays a vital role in minimizing electromagnetic interference. It’s fascinating how these transformers contribute to the overall robustness of Ethernet connections.

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### Author: ![Dylan\_Michael](https://sea2.discourse-cdn.com/sierraconnect/user_avatar/sierraconnect.protoexpress.com/dylan_michael/32/286_2.png) [@Dylan\_Michael](https://sierraconnect.protoexpress.com/u/Dylan_Michael)
#### Post date: [February 27, 2024, 4:33pm UTC](https://sierraconnect.protoexpress.com/t/importance-of-network-transformers-in-ethernet-connections/1135/4 "2024-02-27T16:33:29Z")

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> [@myrtlee](#):
>
> crucial for preventing ground loops

Ah ha, so these will stop a network from failing if there is a loop between two switches!?