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STS31A-DIS

±0.3°C Digital automotive-grade temperature sensor

The STS3x is Sensirion’s high-accuracy digital temperature sensor series. The STS3x temperature sensor utilizes the industry-proven CMOSens® Technology and wins over users with its increased intelligence, reliability, NIST traceability and improved accuracy specifications. There are also automotive grade versions available. Every single STS3x is calibrated and 100% end tested. The calibration is performed with a reference sensor which is NIST traceable through an ISO/IEC 17025 accredited laboratory. The functionality of Sensirion’s STS3x temperature sensor includes enhanced signal processing, two distinctive and user-selectable I²C addresses, and communication speeds of up to 1 MHz. The dual-flat no-leads (DFN) package has a footprint of 2.5 × 2.5 mm² while retaining a height of 0.9 mm. This allows for easy integration of the STS3x series into various applications. Additionally, the wide supply voltage range of 2.15 to 5.5 V and low current consumption (1.7µA typical average current at 1 measurement per second) guarantees compatibility with a wide range of applications. The STS3x temperature sensor gives a fully calibrated, linearized, and supply-voltage-compensated digital output and has an outstanding accuracy of up to +/–0.1°C. There are three versions available: the standard version, STS31, guarantees an accuracy of ±0.2°C over a temperature range of 0°C to 90°C, while the low-cost version, STS30, has an temperature range of 0°C to 65°C. The high-end version STS35 is the most accurate temperature sensor available with an accuracy of ±0.1°C over a temperature range of 20 to 60°C. Thanks to Sensirion’s CMOSens® Technology, the STS3x temperature sensor is designed for mass production, comes with a high signal-to-noise ratio and high process capability, and is proven to be highly reliable and stable over the long term.
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Specification

Temperature
Typ. temperature accuracy0.3°C0.3°C
Operating temperature range [°C]-40 - 125°C-40 - 125°C
Response time (τ63%)2s2s
Generic
Supply voltage2.4 - 5.5V2.4 - 5.5V
Average supply current1.7uA1.7uA
Max. supply current1500uA1500uA
InterfacesI²CI²C
Size (LxWxH)2.5 x 2.5 x 0.9mm2.5 x 2.5 x 0.9mm

Downloads

Datasheet STS3xA
  • 02/2024•
  • PDF•
  • 847.4 KB
DatasheetDownload Datasheet STS3xA02/2024Download Datasheet STS3xAPDFDownload Datasheet STS3xA847.4 KBDownload Datasheet STS3xA
Handling instructions STS
  • 06/2025•
  • PDF•
  • 158.0 KB
Application noteDownload Handling instructions STS06/2025Download Handling instructions STSPDFDownload Handling instructions STS158.0 KBDownload Handling instructions STS
Datasheet STS3x
  • 02/2024•
  • PDF•
  • 893.2 KB
DatasheetDownload Datasheet STS3x02/2024Download Datasheet STS3xPDFDownload Datasheet STS3x893.2 KBDownload Datasheet STS3x
Design-in guide SHT/STS
  • 04/2024•
  • PDF•
  • 822.1 KB
GuideDownload Design-in guide SHT/STS04/2024Download Design-in guide SHT/STSPDFDownload Design-in guide SHT/STS822.1 KBDownload Design-in guide SHT/STS
Design-in guide SHT/STS Chinese
  • 06/2024•
  • PDF•
  • 1.2 MB
GuideDownload Design-in guide SHT/STS Chinese06/2024Download Design-in guide SHT/STS ChinesePDFDownload Design-in guide SHT/STS Chinese1.2 MBDownload Design-in guide SHT/STS Chinese
Embedded drivers temperature
  • Link•
SoftwareDownload Embedded drivers temperatureDownload Embedded drivers temperatureLinkDownload Embedded drivers temperatureDownload Embedded drivers temperature
SEK-ControlCenter (all devices)
  • Link•
SoftwareDownload SEK-ControlCenter (all devices)Download SEK-ControlCenter (all devices)LinkDownload SEK-ControlCenter (all devices)Download SEK-ControlCenter (all devices)
Calibration certification SHT/STS
  • 08/2021•
  • PDF•
  • 110.4 KB
CertificateDownload Calibration certification SHT/STS08/2021Download Calibration certification SHT/STSPDFDownload Calibration certification SHT/STS110.4 KBDownload Calibration certification SHT/STS
REACH and RoHS declaration SHT/STS
  • 04/2026•
  • PDF•
  • 107.3 KB
CertificateDownload REACH and RoHS declaration SHT/STS04/2026Download REACH and RoHS declaration SHT/STSPDFDownload REACH and RoHS declaration SHT/STS107.3 KBDownload REACH and RoHS declaration SHT/STS
Temperature brochure Japanese
  • 05/2025•
  • PDF•
  • 1.4 MB
FlyerDownload Temperature brochure Japanese05/2025Download Temperature brochure JapanesePDFDownload Temperature brochure Japanese1.4 MBDownload Temperature brochure Japanese
Temperature product flyer
  • 10/2024•
  • PDF•
  • 1.1 MB
FlyerDownload Temperature product flyer10/2024Download Temperature product flyerPDFDownload Temperature product flyer1.1 MBDownload Temperature product flyer
Temperature product flyer Chinese
  • 03/2025•
  • PDF•
  • 1.2 MB
FlyerDownload Temperature product flyer Chinese03/2025Download Temperature product flyer ChinesePDFDownload Temperature product flyer Chinese1.2 MBDownload Temperature product flyer Chinese
  • All products
  • •Temperature sensors
  • •STS3x

Sensor evaluation

Buy the following products to evaluate this sensor

NameDescriptionSeriesCategory
SEK-SensorBridgeConnecting bridge with two sensor portsSEK-SensorBridge
SEK-SHT31Humidity and temperature evaluation kit SHT31SEK-SHTxxHumidity sensors

SEK-SensorBridge

Connecting bridge with two sensor ports

SEK-SensorBridge

SEK-SHT31

Humidity and temperature evaluation kit SHT31

SEK-SHTxx

Humidity sensors

Download the respective viewer software to start measuring

Go to download center

Start testing our sensors fast and easy with the evaluation kits

How to get started

Applications for this product

Thermostats

Why thermostats depend on accurate sensors

Learn more

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