# Looking for this part and specs/ replacement options

**URL:** <https://forum.digikey.com/t/looking-for-this-part-and-specs-replacement-options/64419>\
**Category:** RF and Wireless\
**Tags:** cross-reference, rf-mixers, part-identification\
**Created:** [January 20, 2026, 8:31pm UTC](https://forum.digikey.com/t/looking-for-this-part-and-specs-replacement-options/64419 "2026-01-20T20:31:34Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![james\_goos](https://avatars.discourse-cdn.com/v4/letter/j/e495f1/32.png) [@james\_goos](https://forum.digikey.com/u/james_goos)\
**Post date:** [January 20, 2026, 8:31pm UTC](https://forum.digikey.com/t/looking-for-this-part-and-specs-replacement-options/64419/1 "2026-01-20T20:31:34Z")

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Looking for this part and a spec sheet for it. Does anyone have any idea what it is?

 ![unnamed](https://global.discourse-cdn.com/digikey/original/3X/7/8/78bc958b05a4d3f577fcaf24fe69a82cf832e32e.jpeg)

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**Author:** ![nick\_13812](https://avatars.discourse-cdn.com/v4/letter/n/ecb155/32.png) [@nick\_13812](https://forum.digikey.com/u/nick_13812)\
**Post date:** [January 20, 2026, 9:41pm UTC](https://forum.digikey.com/t/looking-for-this-part-and-specs-replacement-options/64419/2 "2026-01-20T21:41:23Z")

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Hello james\_goos and welcome to the DigiKey TechForum.

It appears that it may be an RF MOSFET from Ampleon. Unfortunately, I have not been able to find any information based on the marking shown.

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**Author:** ![David\_1528](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1528/32/47212_2.png) [@David\_1528](https://forum.digikey.com/u/David_1528)\
**Post date:** [January 20, 2026, 10:15pm UTC](https://forum.digikey.com/t/looking-for-this-part-and-specs-replacement-options/64419/3 "2026-01-20T22:15:26Z")

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Based on a Google search, the logo looks very much like the [Marki Microwave](https://markimicrowave.com/) logo.

 ![image](https://global.discourse-cdn.com/digikey/original/3X/0/2/02ac8deffb6e82e24c4054e357713c7aa014efd0.png)

I have not yet identified the particular product.

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**Author:** ![james\_goos](https://avatars.discourse-cdn.com/v4/letter/j/e495f1/32.png) [@james\_goos](https://forum.digikey.com/u/james_goos)\
**Post date:** [January 20, 2026, 10:16pm UTC](https://forum.digikey.com/t/looking-for-this-part-and-specs-replacement-options/64419/4 "2026-01-20T22:16:38Z")

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Thanks I have submitted a request to them to see if it is something that they manufactured.

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**Author:** ![james\_goos](https://avatars.discourse-cdn.com/v4/letter/j/e495f1/32.png) [@james\_goos](https://forum.digikey.com/u/james_goos)\
**Post date:** [January 23, 2026, 3:39pm UTC](https://forum.digikey.com/t/looking-for-this-part-and-specs-replacement-options/64419/5 "2026-01-23T15:39:49Z")

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It is something that they manufactured but the part is no longer available. I need an alternative to put in its place. Attached is the spec sheet for it I just need it in that package or a way to make it fit. Suggestions?

[M3-0309.pdf](https://forum.digikey.com/uploads/short-url/5Ga2Ym3PZD9CoVJnWWHHh7kzeH6.pdf) (158.7 KB)

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**Author:** ![David\_1528](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1528/32/47212_2.png) [@David\_1528](https://forum.digikey.com/u/David_1528)\
**Post date:** [January 23, 2026, 11:03pm UTC](https://forum.digikey.com/t/looking-for-this-part-and-specs-replacement-options/64419/6 "2026-01-23T23:03:33Z")

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Hi James,

It doesn’t look good. I don’t see any similar packages, and for such products, layout is often critical to getting reasonable performance, so hacking a different package into a circuit is not likely to give good results.

In any case, just based on a first scan of the specs, [here’s a link](https://www.digikey.com/short/23dnd2rm) to mixers that are at least in the general ballpark.