component

SHT40-BD1B-R2

Public Made by Adom

by adom

Sensirion Temperature And Humidity Sensor, DFN-4(1.5x1.5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentsensorssht40-bd1b-r2factory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 15h ago
viewers sht40-bd1b-r2: viewers · Ray 15h ago
package.json Publish 0.1.0 · Ray 15h ago
page.json Set visibility: public · Ray 15h ago
README.md Publish 0.1.0 · Ray 15h ago
sht40-bd1b-r2-etched.glb Publish 0.1.0 · Ray 15h ago
sht40-bd1b-r2-etched.step sht40-bd1b-r2: factory component page (tier=lcsc) · Ray 15h ago
sht40-bd1b-r2-hero.glb sht40-bd1b-r2: hero GLB from the etched model (keeps the MPN mark) · Ray 15h ago
sht40-bd1b-r2-hero.overlay.json Publish 0.1.0 · Ray 15h ago
sht40-bd1b-r2.glb Publish 0.1.0 · Ray 15h ago
sht40-bd1b-r2.kicad_mod Publish 0.1.0 · Ray 15h ago
sht40-bd1b-r2.kicad_sym Publish 0.1.0 · Ray 15h ago
sht40-bd1b-r2.lbr Publish 0.1.0 · Ray 15h ago
sht40-bd1b-r2.step Publish 0.1.0 · Ray 15h ago

SHT40-BD1B-R2

Sensirion · Temperature And Humidity Sensor · DFN-4(1.5x1.5)

SHT40-BD1B-R2 from Sensirion, in a DFN-4(1.5x1.5). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 SDA bidirectional Serial data line for I2C communication, bidirectional.
2 SCL input Serial clock line for I2C communication, unidirectional input.
3 VDD power_in Supply voltage pin; the datasheet specifies VDD = 1.08 V … 3.6 V.
4 VSS power_in Ground pin.

Key specifications

Parameter Value
Manufacturer Sensirion
Package DFN-4(1.5x1.5)
Category Sensors
Pins 4

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage VDD 1.08 3.3 3.6 V 9
Power-up/down voltage VPOR 0.6 1.08 V Static power supply 9
Slew rate of the supply voltage VDD, slew 20 V/ms Voltage changes on the supply between VDD, min and VDD, max. Faster slew rates may lead to a reset 9
Supply current (heater off), idle state IDD 0.08 1 µA Idle state, At 25 °C 9
Supply current (heater off), idle state IDD 3.4 µA Idle state, At 125 °C 9
Supply current (heater off), measurement IDD 320 500 µA Current while sensor is measuring 9
Supply current (heater on), nominal heater 200 mW IDD 60 100 mA Nomin. heater 200 mW 9
Supply current (heater on), nominal heater 110 mW IDD 33 55 mA Nomin. heater 110 mW 9
Supply current (heater on), nominal heater 20 mW IDD 6 10 mA Nomin. heater 20 mW 9
Low level input voltage VIL 0 V 9
Pull up resistor Rp 820 Ω VDD < 1.62 V 9
Pull up resistor Rp 390 Ω VDD ≥ 1.62 V 9
Low level output voltage VOL 0.4 V VDD > 2.0 V, Rpullup > 390 Ω 9
Capacitive bus load, fast mode Cb 400 pF RP ≤ 820 Ω: fast mode 9
Capacitive bus load, fast mode plus Cb 340 pF Rp = 390 Ω, VDD > 1.62 V: fast mode plus 9
Power-up time tPU 0.3 1 ms After hard reset, VDD ≥ VPOR 10
Soft reset time tSR 1 ms After soft reset 10
Measurement duration, low repeatability tMEAS,l 1.3 1.6 ms Low repeatability 10
Measurement duration, medium repeatability tMEAS,m 3.7 4.5 ms Med. repeatability 10
Measurement duration, high repeatability tMEAS,h 6.9 8.3 ms High repeatability 10
Heater-on duration, long pulse tHeater 0.9 1 1.1 s Long pulse 10
Heater-on duration, short pulse tHeater 0.09 0.1 0.11 s Short pulse 10
Max voltage on any pin -0.3 V 10
Operating temperature range -40 125 °C 10
Storage temperature range -40 150 °C 10
ESD HBM 2 kV 10
ESD CDM 500 V 10
Latch up 100 mA JESD78 Class II, 125 °C 10
Normal operating temperature range 5 60 °C Recommended normal temperature range 7
Normal operating relative humidity range 20 80 %RH Recommended normal humidity range 7
Specified temperature range -40 125 °C Specified range 6
Specified relative humidity range 0 100 %RH Specified range, extended 4
Junction-to-ambient thermal resistance RθJA 246 K/W Heater off, die pad soldered 16
Junction-to-ambient thermal resistance RθJA 308 K/W Heater on, die pad soldered 16
Junction-to-ambient thermal resistance RθJA 297 K/W Heater off, die pad not soldered 16
Junction-to-ambient thermal resistance RθJA 357 K/W Heater on, die pad not soldered 16
Junction-to-case thermal resistance RθJC 189 K/W Heater off, die pad soldered 16
Junction-to-case thermal resistance RθJC 255 K/W Heater on, die pad soldered 16
Junction-to-case thermal resistance RθJC 191 K/W Heater off, die pad not soldered 16
Junction-to-case thermal resistance RθJC 257 K/W Heater on, die pad not soldered 16
Junction-to-board thermal resistance RθJB 159 K/W Heater off, die pad soldered 16
Junction-to-board thermal resistance RθJB 225 K/W Heater on, die pad soldered 16
Junction-to-board thermal resistance RθJB 193 K/W Heater off, die pad not soldered 16
Junction-to-board thermal resistance RθJB 258 K/W Heater on, die pad not soldered 16

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts copper SHT4x is provided in an open-cavity dual flat no lead (DFN) package. The humidity sensor opening is centered on the top side of the package. The sensor chip is made of silicon, hosted on a copper lead 14

CAD (KiCad official)

  • Symbol: SHT40-BD1B-R2
  • Footprint: Sensor_Humidity:Sensirion_DFN-4_1.5x1.5mm_P0.8mm_SHT4x_NoCentralPad
  • 3D model: DFN-4(1.5x1.5), generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.55 mm nominal QFN height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
  • 3D model files: sht40-bd1b-r2-etched.step / sht40-bd1b-r2-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sht40-bd1b-r2.step / sht40-bd1b-r2.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Sensirion datasheet (23 pp, sha256 dee272ffc0a3ec57, retrieved 2026-10-20, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF