# Adafruit INA219 current sensor breakout (904, STEMMA QT): 25.4 × 20.32 mm board and mounting holes

> What are the Adafruit INA219 breakout dimensions and mounting-hole positions?

- Category: Electronic components › Modules, sensors & displays
- Kind: Modern device
- Basis: Adafruit's Eagle board file for the INA219 STEMMA QT breakout and Adafruit's CAD model for connector heights.
- Page: https://xemstudio.com/objects/adafruit-ina219-904-stemma-qt/ · JSON: https://xemstudio.com/api/geometry?object=adafruit-ina219-904-stemma-qt · Plain text: https://xemstudio.com/objects/adafruit-ina219-904-stemma-qt/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 |
|---|---|---|
| 25.4 | 20.32 | 4.56 |

**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: board centred on X and Y, bottom on z=0; +Y is the screw-terminal edge, −Y the 6-pin header edge.
- Board 25.40 × 20.32 × 1.6 mm with R2.54 corners.
- Four Ø2.50 holes at (±10.16, ±7.62): a 20.32 × 15.24 mm pattern.
- Two side-entry JST SH 4-pin STEMMA QT connectors, 4.94 × 6.00 × 2.96, at x=±7.70..±12.64, centred in Y; overall height 4.56.
- Not modelled: the 1×6 header and 2-pin 3.5 mm terminal block (ship unsoldered). The original non-STEMMA board (25.40 × 22.24) is a different part.
- Exact nominal mm.

## 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 | 4 × Ø2.50 on 20.32 × 15.24 | M2 screws or standoffs | designed | all |
| STEMMA QT connectors | JST SH 4-pin, 1.0 pitch | STEMMA QT / Qwiic cable | socket | all |

## Sizes

| hole | x (mm) | y (mm) | diameter (mm) |
|---|---|---|---|
| 1 | -10.16 | -7.62 | 2.5 |
| 2 | 10.16 | -7.62 | 2.5 |
| 3 | -10.16 | 7.62 | 2.5 |
| 4 | 10.16 | 7.62 | 2.5 |

## Where the files are

- Adafruit: [INA219 High Side DC Current Sensor Breakout – STEMMA QT](https://www.adafruit.com/product/904) — web — Publisher's page; dimensions are facts
- Adafruit (GitHub): [Adafruit INA219 Current Sensor PCB files](https://github.com/adafruit/Adafruit-INA219-Current-Sensor-PCB) — web — Publisher's page; dimensions are facts
- Adafruit (GitHub): [Adafruit_CAD_Parts: 904 INA219 Stemma](https://github.com/adafruit/Adafruit_CAD_Parts/tree/main/904%20INA219%20Stemma) — web — Publisher's page; dimensions are facts

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

Index: https://xemstudio.com/files/hardware/adafruit-ina219-904-stemma-qt/index.json

- adafruit-ina219-904-stemma-qt: [STEP](https://xemstudio.com/files/hardware/adafruit-ina219-904-stemma-qt/adafruit-ina219-904-stemma-qt.step) · [STL](https://xemstudio.com/files/hardware/adafruit-ina219-904-stemma-qt/adafruit-ina219-904-stemma-qt.stl) — Adafruit INA219 current sensor breakout (904, STEMMA QT): 25.4 × 20.32 mm board and mounting holes

## Questions

**How big is the Adafruit INA219 breakout?**

25.40 × 20.32 mm (STEMMA QT version), 4.56 mm tall over the connectors.

**Where are the mounting holes?**

Four Ø2.50 holes on a 20.32 × 15.24 mm rectangle centred on the board.

## Fits with

- [Adafruit STEMMA QT sensor breakouts (BME280, BNO055/085, VL53, SCD-40, AHT20, SHT40, IMUs, light, magnet, RTC…)](https://xemstudio.com/objects/adafruit-stemma-qt-breakouts/)
- [JST SH connector (1.0 mm pitch): wire, ratings, circuits](https://xemstudio.com/objects/jst-sh-connector/)
- [Screw terminal blocks: Phoenix MKDS 1,5 and MKDS 3 (5.0 / 5.08 mm), 2–6 positions](https://xemstudio.com/objects/terminal-blocks/)
- [2.54 mm pin headers, 1×2 to 2×20, vertical and right-angle](https://xemstudio.com/objects/pin-headers-2.54mm/)
- [Threaded standoffs, M2.5 and M3 (hex and round)](https://xemstudio.com/objects/threaded-standoffs-metric/)