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Thermal: ExtraMinecraft mod for 1.21.5

Add tiers of augments and new machines to Thermal Expansion!

client and servernewest supported release 1.21.5TechnologyEquipmentDecoration
Latest version
3.3.3-1.20.1
Minecraft
1.16.5 to 1.21.5
Java
Java 21+
Loaders
NeoForge, Forge
Licence
MIT
Downloads
100.9k
Updated
1 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Thermal: Extra servers

One click and Thermal: Extra is installed with the right loader, on hardware built for it.

  • 1.21.5
  • NeoForge
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version Thermal: Extra declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.5NeoForge, Forge21+declared25 Mar 2025
1.21.4NeoForge, Forge21+declared3 Dec 2024
1.21.3Forge, NeoForge21+declared23 Oct 2024
1.21.2NeoForge, Forge21+declared22 Oct 2024
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.21NeoForge, Forge21+declared13 Jun 2024
1.20.6NeoForge, Forge21+declared29 Apr 2024
1.20.5NeoForge, Forge21+declared23 Apr 2024
1.20.4NeoForge, Forge17+declared7 Dec 2023
1.20.3NeoForge, Forge17+declared4 Dec 2023
1.20.2Forge, NeoForge17+declared20 Sept 2023
1.20.1NeoForge, Forge17+declared12 Jun 2023
1.19.2NeoForge, Forge17+declared5 Aug 2022
1.18NeoForge, Forge17+declared30 Nov 2021
1.16.5NeoForge, Forge8+declared14 Jan 2021

Download

From Thermal: Extra’s own host. Nothing is re-hosted here.

Browse 34 indexed releases

For Minecraft 1.21.5

Choose the loader you use before downloading.

  • Forge

    3.2.5-1.20.1 · 28 Apr 2025 · ThermalExtra-3.2.5-1.20.1.jar

    Get Forge

Most recently published release

3.3.3-1.20.1release19 Sept 2026

ThermalExtra-3.3.3-1.20.1.jar · 1.6 MB · for 1.20.1 · Forge, NeoForge

Choose file on publisher ↗
34135e2dffa5…
Older versions24

Dependencies

What Thermal: Extradeclares it needs, from the author’s own release metadata. A required one has to be installed alongside it or it will not load.

Thermal ExpansionRequired. Expanding Minecraft Thermally! A server-friendly and content-rich blend of magic and technology!Thermal InnovationRequired. Thermal Technology marches on. Adds Thermal-style tools and equipment!CreateOptional. Aesthetic Technology that empowers the PlayerMekanismOptional. High-tech machinery, powerful energy generation, fancy gadgets and more. Now on Modrinth!Immersive EngineeringOptional. Retrofuturism, industry and multiblocks!Wizard's RebornOptional. Adds magical things

Frequently asked

Does Thermal: Extra work on Minecraft 1.21.5?

Yes. 1.21.5 is the newest Minecraft version Thermal: Extra declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Thermal: Extra support?

Everything the author has declared, from 1.16.5 up to 1.21.5. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Thermal: Extra on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does Thermal: Extra support?

NeoForge, Forge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Thermal: Extra?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What does Thermal: Extra need to run?

It declares Thermal Expansion and Thermal Innovation as required, so those have to be installed alongside it or it will not load. Each one is linked in the dependencies section above.

What licence is Thermal: Extra under?

MIT, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Thermal: Extra?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Thermal: Extra safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

GeckoLibA 3D animation library for entities, blocks, items, armor, and more!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Jade 🔍Shows information about what you are looking at. (Hwyla/WAILA fork for Minecraft 1.16+)Collective🎓 Collective is a shared library with common code for all of Serilum's mods.

Details from Modrinth, where the author last updated it on 19 Sept 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .