# automotive blocking diode

**URL:** <https://forum.core-electronics.com.au/t/automotive-blocking-diode/6873>\
**Category:** Uncategorized\
**Created:** [27 November 2019 01:59 UTC](https://forum.core-electronics.com.au/t/automotive-blocking-diode/6873 "2019-11-27T01:59:16Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![richard104192](https://avatars.discourse-cdn.com/v4/letter/r/a8b319/32.png) [@richard104192](https://forum.core-electronics.com.au/u/richard104192)\
**Post date:** [27 November 2019 01:59 UTC](https://forum.core-electronics.com.au/t/automotive-blocking-diode/6873/1 "2019-11-27T01:59:16Z")

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I need help selecting which type of diode to use in a 12v automotive situation to trigger a 1 amp relay where the diode purpose is to block and reverse current

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**Author:** ![Graham](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/graham/32/54_2.png) [@Graham](https://forum.core-electronics.com.au/u/Graham)\
**Post date:** [27 November 2019 02:04 UTC](https://forum.core-electronics.com.au/t/automotive-blocking-diode/6873/2 "2019-11-27T02:04:29Z")

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Hi Richard,

A Schottky Diode ought to work just fine for that.

> **[Schottky Diode](https://core-electronics.com.au/schottky-diode.html)**
>
> Schottky diodes are known for their low forward voltage drop and a very fast switching action. This 1A 40V Schottky diode is ideal for use with motor drivers such as the L298N.