Overview
The STC31-R3 is a gas Sensor made by Sensirion in a QFN-12-EP(3x3.5) package with 13 pins. -20℃~+85℃ 1mm 2.7V~5.5V 3.5mm 3mA 3mm Carbon dioxide I2C Reset function ±0.5% QFN-12-EP(3x3.5) Gas Sensors ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:STC31-R3, from EasyEDA) and its footprint (EasyEDA_Cloud:QFN-12_L3.5-W3.0-P0.80-BL-EP, from EasyEDA), ready for a KiCad board. JLCPCB lists it (part C1513451).
Symbol
Footprint
Parameters
10- Current - Supply
- 3mA
- Features
- Reset function
- Height
- 1mm
- Interface
- I2C
- Length
- 3.5mm
- Operating Temperature
- -20℃~+85℃
- Tolerance
- ±0.5%
- Type
- Carbon dioxide
- Voltage - Supply
- 2.7V~5.5V
- Width
- 3mm
Order codes
1- STC31-R3LCSC C1513451
Pinout
13| Pin | Name | Type |
|---|---|---|
| 1 | VSS | Unspecified |
| 2 | Reserved | Unspecified |
| 3 | ADDR | Unspecified |
| 4 | SCL | Unspecified |
| 5 | VSS | Unspecified |
| 6 | VDD | Unspecified |
| 7 | SDA | Unspecified |
| 8 | Reserved | Unspecified |
| 9 | VSS | Unspecified |
| 10 | Reserved | Unspecified |
| 11 | VSS | Unspecified |
| 12 | Reserved | Unspecified |
| 13 | EP | Unspecified |
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<iframe src="https://pcbkit.io/embed/parts/sensirion/STC31-R3" title="STC31-R3 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/sensirion/STC31-R3.jpg" alt="STC31-R3" width="1200" height="900">[](https://pcbkit.io/parts/sensirion/STC31-R3)Questions
Is there a KiCad symbol and footprint for the STC31-R3?
Yes. The symbol is EasyEDA_Cloud:STC31-R3 and the footprint EasyEDA_Cloud:QFN-12_L3.5-W3.0-P0.80-BL-EP, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the STC31-R3?
QFN-12-EP(3x3.5), with 13 pins. Its footprint is drawn on this page.
Where is the STC31-R3 datasheet?
Sensirion publishes it: the Datasheet link on this page opens it.
Where can I order the STC31-R3?
JLCPCB lists it as part C1513451, with 0 in stock; the sellers' links on this page open their listings.
What can replace the STC31-R3?
Parts like it in the library: the STC31-C-R3 by Sensirion and the STC42A-D-R5 by Sensirion. Check their datasheets: a part that fits the footprint may still differ in its ratings.
