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TMP6431QDYARQ1

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Texas Instruments PTC Thermistors, SOD-523. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TMP6431QDYARQ1

Texas Instruments · PTC Thermistors · SOD-523

TMP6431QDYARQ1 from Texas Instruments, in a SOD-523. 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 - passive Negative thermistor terminal; it must sit at the lower potential so that pin 2 (+) is more positive than pin 1 for correct biasing, with VSNS limited to 0 to 5.5 V recommended (6 V absolute maximum) and ISNS limited to 100 µA recommended (450 µA absolute maximum).
2 + passive Positive thermistor terminal; it must be at a higher potential than pin 1 (-) to ensure correct operation, and should be connected to the highest voltage potential, with VSNS limited to 0 to 5.5 V recommended (6 V absolute maximum) and ISNS limited to 100 µA recommended (450 µA absolute maximum).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOD-523
Category Sensors
Pins 2

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Nominal resistance at 25°C (R25) R25 46.53 47 47.47 kΩ TA=25°C 6
Resistance tolerance (RTOL) RTOL -1 1 % TA=25°C 6
Resistance tolerance (RTOL) RTOL -1.5 1.5 % TA = -40°C - 125°C 6
Temperature coefficient of resistance tolerance (TCR-35 %) TCR-35 -0.4 0.4 % T1 = -40°C, T2 = -30°C 6
Temperature coefficient of resistance tolerance (TCR25 %) TCR25 -0.2 0.2 % T1 = 20°C, T2 = 30°C 6
Temperature coefficient of resistance tolerance (TCR85 %) TCR85 -0.3 0.3 % T1 = 80°C, T2 = 90°C 6
Sensor long-term drift (ΔR), 96 h, DYA package ΔR -1 0.14 1 % RH = 85%, 96 h continuous operation, TA = 130°C, VBias = 5.5V, DYA package 6
Sensor long-term drift (ΔR), 600 h, DYA package ΔR -1.5 0.2 1.5 % 600 h continuous operation, TA = 150°C, VBias = 5.5V, DYA package 6
Sensor long-term drift (ΔR), 1000 h, DYA package ΔR -1.8 0.3 1.8 % 1000 h continuous operation, TA = 150°C, VBias = 5.5V, DYA package 6
Voltage across pins 2 (+) and 1 (-) 6 V 5
Current through device 450 µA 5
Junction temperature TJ -65 155 °C 5
Storage temperature Tstg -65 155 °C 5
Voltage across pins 2 (+) and 1 (-) VSns 0 5.5 V 5
Current through device ISns 0 100 µA 5
Natural-ventilation operating temperature range, SOT-5X3/DYA package TA -40 150 °C Natural ventilation, DYA package 5
Temperature coefficient of resistance (TCR-35) TCR-35 6220 ppm/°C T1 = -40°C, T2 = -30°C 6
Temperature coefficient of resistance (TCR25) TCR25 6400 ppm/°C T1 = 20°C, T2 = 30°C 6
Temperature coefficient of resistance (TCR85) TCR85 5910 ppm/°C T1 = 80°C, T2 = 90°C 6
Thermal response time, stirred liquid (63%) tRES 0.6 s 63% response, still air T1 = 25°C to stirred liquid T2 = 125°C 6
Thermal response time, still air (63%) tRES 3.2 s 63% response, still air T1 = 25°C to T2 = 70°C 6
Junction-to-ambient thermal resistance (DYA) RθJA 749.2 °C/W 5
Junction-to-case (top) thermal resistance (DYA) RθJC(top) 315.8 °C/W 5
Junction-to-board thermal resistance (DYA) RθJB 506.2 °C/W 5
Junction-to-top characterization parameter (DYA) ΨJT 109.3 °C/W 5
Junction-to-board characterization parameter (DYA) ΨJB 500.4 °C/W 5

CAD (KiCad official)

  • Symbol: TMP6431QDYARQ1
  • Footprint: Diode_SMD:D_SOD-523
  • 3D model: SOD-523 (KiCad packages3D, STEP)
  • 3D model files: tmp6431qdyarq1-etched.step / tmp6431qdyarq1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tmp6431qdyarq1.step / tmp6431qdyarq1.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (28 pp, sha256 bac326980ac9ba01, retrieved 2026-10-14, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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