# Thundercomm RUBIK Pi 3 (Qualcomm QCS6490): board outline, 8 mounting holes and connector positions

> What are the Thundercomm RUBIK Pi 3 dimensions, mounting holes and connector positions?

- Category: Electronic components › Single-board computers
- Kind: Modern device
- Basis: Thundercomm RUBIK Pi 3 Datasheet V1.2.3 (section 2.4, Figure 2-4) and Thundercomm's official RUBIK Pi 3 3D model.
- Page: https://xemstudio.com/objects/thundercomm-rubik-pi-3/ · JSON: https://xemstudio.com/api/geometry?object=thundercomm-rubik-pi-3 · Plain text: https://xemstudio.com/objects/thundercomm-rubik-pi-3/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 100.0 | 78.89 | 24.71 |

**Exact dimensions.** Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part.

## Notes

- Datum: lower-left board corner, I/O edge (all front connectors) along y=0, 40-pin header along the far edge. PCB 100.0 × 75.0, R4 corners, 1.55 thick.
- Six Ø2.70 mounting holes (table); four of them form a 58.0 × 49.0 rectangle, the same spacing as the Raspberry Pi B pattern. Two further Ø3.00 holes at (4, 28.5) and (62, 65.5).
- Front connectors overhang the I/O edge by up to 3.89 (78.89 overall). Tallest part is the dual USB-A stack, 16.4 above the board top.
- The board underside sits 6.75 above the lowest point: the M.2 Key-M socket and SSD standoff hang below the board.
- Modelled: PCB, holes, USB-A, USB-C, HDMI, RJ45, audio jack, 40-pin header, SoC shield, M.2 socket and standoff. Not modelled: FPC connectors, buttons, LEDs and pin tails.
- All dimensions are exact nominal millimetres, true size, with no tolerance added.

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| Mounting holes | 6 × Ø2.70, incl. a 58.0 × 49.0 rectangle | M2.5 standoffs in a case or base plate | designed | all |
| I/O edge cut-outs | connectors overhang the edge by up to 3.89, top 24.71 above the lowest point | case front panel openings | designed | all |

## Sizes

| hole | x (mm) | y (mm) | diameter (mm) |
|---|---|---|---|
| 1 | 4.0 | 22.5 | 2.70 |
| 2 | 4.0 | 71.5 | 2.70 |
| 3 | 62.0 | 22.5 | 2.70 |
| 4 | 62.0 | 71.5 | 2.70 |
| 5 | 96.5 | 3.5 | 2.70 |
| 6 | 96.5 | 71.5 | 2.70 |
| 7 | 4.0 | 28.5 | 3.00 |
| 8 | 62.0 | 65.5 | 3.00 |

## Where the files are

- Thundercomm: [About RUBIK Pi 3 (documentation)](https://www.thundercomm.com/rubik-pi-3/en/docs/about-rubikpi/) — web — Publisher's page; dimensions are facts
- Thundercomm: [RUBIK Pi 3 product page](https://thundercomm.com/rubik-pi-3/en/) — web — Publisher's page; dimensions are facts
- Edge Impulse: [Thundercomm RUBIK Pi 3 board documentation](https://docs.edgeimpulse.com/hardware/boards/thundercomm-rubikpi3) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/thundercomm-rubik-pi-3/index.json

- thundercomm-rubik-pi-3: [STEP](https://xemstudio.com/files/hardware/thundercomm-rubik-pi-3/thundercomm-rubik-pi-3.step) · [STL](https://xemstudio.com/files/hardware/thundercomm-rubik-pi-3/thundercomm-rubik-pi-3.stl) — Thundercomm RUBIK Pi 3 (Qualcomm QCS6490): board outline, 8 mounting holes and connector positions

## Questions

**How big is the RUBIK Pi 3?**

The PCB is 100 × 75 mm with R4 corners; overall 100 × 78.89 × 24.71 mm including connector overhang and the M.2 socket underneath.

**Does the RUBIK Pi 3 fit Raspberry Pi standoffs?**

Four of its Ø2.70 holes form a 58 × 49 mm rectangle, the same spacing as the Raspberry Pi B pattern; it has two more Ø2.70 holes at x=96.5.

**What is under the RUBIK Pi 3?**

An M.2 Key-M socket and SSD standoff: the board underside is 6.75 mm above the lowest point.

## Fits with

- [Raspberry Pi 5](https://xemstudio.com/objects/raspberry-pi-5/)
- [Raspberry Pi 4 Model B](https://xemstudio.com/objects/raspberry-pi-4-b/)
- [NVIDIA Jetson Orin Nano Developer Kit](https://xemstudio.com/objects/jetson-orin-nano-devkit/)
- [Threaded standoffs, M2.5 and M3 (hex and round)](https://xemstudio.com/objects/threaded-standoffs-metric/)
- [M.2 2280 SSD / module size](https://xemstudio.com/objects/m-2-2280-ssd/)
- [2.54 mm pin headers, 1×2 to 2×20, vertical and right-angle](https://xemstudio.com/objects/pin-headers-2.54mm/)