AHT21 Humidity and Temperature Sensor

ASAIR AHT21 calibrated digital humidity and temperature sensor, I2C (address 0x38), SMD LGA-6 package 3x3x0.8mm. Land pattern per manufacturer datasheet (identical to AHT20; 0.2mm lower body).

Loading 3D…

Specifications

Manufacturer	Aosong (ASAIR)
Family	AHT2x
MPN pattern	AHT21
Pins	6
Mounting	SMD

Downloads · no sign-up

kicad_mod KiCad footprint kicad_sym KiCad symbol step 3D STEP glb 3D preview

Datasheet

Manufacturer datasheet

Buy

Find this part at distributors →

Affiliate link · Part license: CC-BY-4.0

Field reports

Used this part on a real board? One click, no sign-up beyond GitHub: ✅ It worked ⚠️ Report a problem Reports feed this part's public trust score (AI agents: use report_feedback via MCP).

For AI agents

Machine-readable data for this part: /api/v1/parts/aht21.json (absolute download URLs). MCP: https://mcp.partreel.com/mcp → get_part("aht21"). See /llms.txt · agent guide