# STS40-CD1B-R3 (Component)
## Description
Temperature Sensor Digital, Local -40°C ~ 125°C 16 b 4-DFN (1.5x1.5)
STS40-CD1B-R3 is a high-accuracy digital temperature sensor from Sensirion, designed for precise temperature monitoring in space-constrained and low-power applications. Part of the STS4x series, it features a fully calibrated temperature sensing element with an I²C digital interface, providing reliable measurements over a wide operating temperature range. Its ultra-compact 4-DFN package makes it ideal for IoT devices, wearables, consumer electronics, industrial controls, and battery-powered systems.
Key Features
High-accuracy temperature measurement (±0.2°C typical at 25°C)
Wide operating temperature range: -40°C to +125°C
Digital I²C interface for easy MCU integration
16-bit temperature resolution
Low operating voltage: 1.08 V to 3.6 V
Factory calibrated and linearized output
Ultra-small 1.5 mm × 1.5 mm DFN package
Low power consumption suitable for battery-powered devices
Surface-mount package for automated assembly
Robust performance for industrial and consumer applications
#STS40 #STS40CD1BR3 #Sensirion #TemperatureSensor #DigitalSensor #I2C #EmbeddedSystems #IoT #IndustrialAutomation #WearableElectronics #EnvironmentalMonitoring #ElectronicsDesign
## Component Details
- **Owner:** adrian95
- **Created:** 6/16/2026
- **Last Updated:** 6/16/2026
- **Visibility:** Public
- **Symbol Style:** parametric-v1
- **Package or Case Code:** 4-DFN
- **Manufacturer Name:** Sensirion
- **License:** https://creativecommons.org/licenses/by/4.0/
- **Manufacturer Part Number:** STS40-CD1B-R3
- **Part Type:** Sensors
- **Datasheet URL:** https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/a287b473f55e82a8aac34d0f6aecc14e063b2cd506b347bf52f7a0a204c38851.pdf
- **Used in:** 3 projects
## Distributor Pricing (qty 1)
*Pricing shown for quantity 1. For price breaks and other quantities, open in Flux.*
| Distributor | Unit Price (qty 1) | Stock |
|------------|--------------------|-------|
| [Arrow](https://www.arrow.com/en/products/sts40-cd1b-r3/sensirion-ag.html?utm_currency=USD®ion=nac) | N/A | N/A |
| [Mouser](https://www.mouser.com/ProductDetail/Sensirion/STS40-CD1B-R3?qs=MyNHzdoqoQImDTeCzq4hBA%3D%3D) | $0.67 | 15K |
- **Part Type:** Sensors
- **MPN:** STS40-CD1B-R3
- **Mount Type:** Surface Mount
- **Package / Case Code:** 16-DFN
- **Pin Count:** 4
## Pins
| Pin | Name | Type |
|-----|------|------|
| 1 | SDA | |
| 2 | SCL | |
| 3 | VDD | |
| 4 | VSS | |
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*Generated from [https://www.flux.ai/adrian95/sts40-cd1b-r3](https://www.flux.ai/adrian95/sts40-cd1b-r3)*