
OpenAirScope
emertcakir/OpenAirScope
Open-source air quality and environmental monitoring node with STM32H743 + ESP32-C3, LoRaWAN, RS485, USB-C, Li-ion charging, and multi-sensor support.
The SGP41-D-R4 is a VOC Sensor made by Sensirion in a DFN-6(2.4x2.4) package with 7 pins. DFN-6(2.4x2.4) VOC Sensors ROHS.
PCBKit's library has its KiCad symbol (corpus:SGP41-D-R4_5b7e95f3, from open boards on GitHub), ready for a KiCad board. 2,284 are in stock at JLCPCB (part C3659325). 38 open-source boards in 33 repositories on GitHub use it.
The library has no footprint for this part yet.
| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| Supply voltage, hotplate supply voltage9 VDD, VDDH | VDD and VDDH connected to the same power supply | min 1.7 · typ 3.3 · max 3.6 V | 5 |
| Idle current IDD | 25 °C, 3.3 V; after power-up, heater-off command, or soft reset | typ 34 · max 105 A | 5 |
| Supply current during conditioning mode10 | 25 °C; continuously operated at VDD, VDDH = 1.8 V; average current | typ 6.5 · max 7.2 mA | 5 |
| Supply current during conditioning mode10 | 25 °C; continuously operated at VDD, VDDH = 3.3 V; average current | typ 4.2 · max 4.6 mA | 5 |
| Supply current during VOC+NOx measurement mode10 | 25 °C; continuously operated at VDD, VDDH = 1.8 V; average current | typ 4.3 · max 4.8 mA | 5 |
| Supply current during VOC+NOx measurement mode10 | 25 °C; continuously operated at VDD, VDDH = 3.3 V; average current | typ 3 · max 3.4 mA | 5 |
| Power-up time tPU | After hard reset, VDD ≥ VPOR | typ 0.4 · max 0.6 ms | 5 |
| Soft reset time tSR | After soft reset | typ 0.4 · max 0.6 ms | 5 |
| SCL clock frequency fSCL | max 400 kHz | 5 | |
| Relative humidity | Operating conditions | min 0 · max 90 % RH | 6 |
| Temperature | Operating conditions | min -10 · max 50 °C | 6 |
| Humidity | Operating conditions of humidity compensation; dew points −13 °C and +31 °C at the respective limits; maximum is the smaller of 30 g m−3 and 90 % RH | min 1.5 · max 30 g m−3 (°C dew point) | 6 |
| Humidity | Operating conditions of humidity compensation; maximum is the smaller of 30 g m−3 and 90 % RH | max 90 % RH | 6 |
| Temperature | Operating conditions of humidity compensation | min -10 · max 50 °C | 6 |
| Relative humidity | Storage conditions | min 0 · max 80 % RH | 6 |
| Temperature | Storage conditions | min 5 · max 30 °C | 6 |
| Supply voltage VDD VDD | min -0.3 · max 3.6 V | 7 | |
| Supply voltage VDDH VDDH | min -0.3 · max 3.6 V | 7 | |
| Short-term storage temperature range11 | Temporary conditions during, e.g., transport | min -40 · max 70 °C | 7 |
| Operating temperature range | min -20 · max 55 °C | 7 | |
| Short-term storage humidity range12 | Non-condensing | min 0 · max 80 % | 7 |
| Operating humidity range | Non-condensing | min 0 · max 90 % | 7 |
| ESD HBM | max 2 kV | 7 | |
| ESD CDM | max 500 V | 7 | |
| Latch up, JESD78 Class II, 125 °C | JESD78 Class II, 125 °C | max 100 mA | 7 |
| Pin | Name | Type |
|---|---|---|
| 1 | VDD | Unspecified |
| 2 | VSS | Unspecified |
| 3 | SDA | Unspecified |
| 4 | n/a | Unspecified |
| 5 | VDDH | Unspecified |
| 6 | SCL | Unspecified |
| 7 | EP | Unspecified |

emertcakir/OpenAirScope
Open-source air quality and environmental monitoring node with STM32H743 + ESP32-C3, LoRaWAN, RS485, USB-C, Li-ion charging, and multi-sensor support.

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PCB design for a custom air quality measuring device

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Yes. The symbol is corpus:SGP41-D-R4_5b7e95f3, both drawn on this page. PCBKit places them on a board for you when you design with it.
DFN-6(2.4x2.4), with 7 pins.
Sensirion publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C3659325, with 2,284 in stock; the sellers' links on this page open their listings.
38 boards in 33 repositories on GitHub; the most starred are listed on this page, with their KiCad files.