2 layers71 × 73 mm
Alarm
bbokser/persuasive_waker
An open source hardware alarm clock that can't be snoozed or turned off.
71 parts3MIT
Overview
The SHT40-BD1B-R2 is a temperature And Humidity Sensor made by Sensirion in a DFN-4(1.5x1.5) package with 4 pins. -40℃~+125℃ 0%RH~100%RH 1.08V~3.6V 16bit 400nA Factory calibration、Built-in heater I2C ±0.2℃ ±1.8%RH DFN-4(1.5x1.5) Temperature and Humidity Sensor ROHS.
PCBKit's library has its KiCad symbol (Sensor_Humidity:SHT4x, from KiCad's library) and its footprint (Sensor_Humidity:Sensirion_DFN-4_1.5x1.5mm_P0.8mm_SHT4x_NoCentralPad, from KiCad's library), ready for a KiCad board. 2,400 are in stock at JLCPCB (part C7461849). 4 open-source boards in 4 repositories on GitHub use it.
Symbol
Footprint
Parameters
9- Current - Supply
- 400nA
- Features
- Factory calibration
- Humidity
- 0%RH~100%RH
- Humidity Tolerance
- ±1.8%RH
- Interface
- I2C
- Resolution
- 16bit
- Temperature Range
- -40℃~+125℃
- Temperature Tolerance
- ±0.2℃
- Voltage - Supply
- 1.08V~3.6V
Order codes
1- SHT40-BD1B-R2LCSC C7461849
Pinout
4| Pin | Name | Type |
|---|---|---|
| 1 | SDA | Input/output |
| 2 | SCL | Input |
| 3 | VDD | Power in |
| 4 | VSS | Power in |
Open-source boards using it
All 4- 2 layers121 × 73 mm
- 4 layers96 × 70 mm
Tradewind
binaryBeachLLC/tradewind
Tradewind TW-1: solar LoRaWAN field sensor. KiCad 9 board, CadQuery enclosure, RUI3 firmware, simulations, test data, report and datasheet.
85 parts - 4 layers88.9 × 96.5 mm
Ers s32-board
schrodlm/nxp_hal
In this assignment the target platform changes from the STM32F407 to the NXP S32K118, an Arm Cortex‑M0+ microcontroller from the S32K1xx automotive family.
138 parts
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<iframe src="https://pcbkit.io/embed/parts/sensirion/SHT40-BD1B-R2" title="SHT40-BD1B-R2 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/SHT40-BD1B-R2.jpg" alt="SHT40-BD1B-R2" width="1200" height="900">[](https://pcbkit.io/parts/sensirion/SHT40-BD1B-R2)Questions
Is there a KiCad symbol and footprint for the SHT40-BD1B-R2?
Yes. The symbol is Sensor_Humidity:SHT4x and the footprint Sensor_Humidity:Sensirion_DFN-4_1.5x1.5mm_P0.8mm_SHT4x_NoCentralPad, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the SHT40-BD1B-R2?
DFN-4(1.5x1.5), with 4 pins. Its footprint is drawn on this page.
Where is the SHT40-BD1B-R2 datasheet?
Sensirion publishes it: the Datasheet link on this page opens it.
Where can I order the SHT40-BD1B-R2?
JLCPCB lists it as part C7461849, with 2,400 in stock; the sellers' links on this page open their listings.
What can replace the SHT40-BD1B-R2?
Parts like it in the library: the SHT40-AD1B-R2 by Sensirion, the SHT40I-AD1B-R3 by Sensirion, the SHT41-AD1B-R3 by Sensirion and the SHT40I-BD1B-R3 by Sensirion. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the SHT40-BD1B-R2?
4 boards in 4 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
4
SHT40-AD1B-R2
DFN-4-EP(1.5x1.5)Temperature And Humidity SensorSensirionSHT40I-AD1B-R3
DFN-4(1.5x1.5)Factory calibration、Built-in heater DFN-4(1.5x1.5) Temperature and Humidity Sensor ROHSSensirionTemperature And Humidity SensorSHT41-AD1B-R3
DFN-4(1.5x1.5)-40℃~+125℃ 0%RH~100%RH 1.08V~3.6V 16bit 400nA I2C ±0.2℃ ±1.8%RH DFN-4(1.5x1.5) Temperature and Humidity Sensor ROHSSensirionTemperature And Humidity SensorSHT40I-BD1B-R3
-Factory calibration、Built-in heater I2C ±1.8%RH、±0.2℃ - Temperature and Humidity Sensor ROHSSensirionTemperature And Humidity Sensor