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103JG1K

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Littelfuse NTC Thermistors, DO-35. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

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103JG1K

Littelfuse · NTC Thermistors · DO-35

103JG1K from Littelfuse, in a DO-35. 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 1 passive Terminal 1 of an unpolarised resistor; either orientation.
2 2 passive Terminal 2 of an unpolarised resistor; either orientation.

Key specifications

Parameter Value
Manufacturer Littelfuse
Package DO-35
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
Resistance Tolerance @25°C -10 10 % @ 25°C, tolerance code K 3
Operating Temperature Range -55 300 °C Temperature Range 3
Resistance @25°C R25 10000 Ohms @ 25°C 3
Temperature Coefficient @25°C -4.4 %/°C @ 25°C, R-T curve J 3
Beta 0-50°C Beta (K) 3892 K 0-50°C 3
Dissipation Constant, Nominal 2 mW/°C Nominal 3
Thermal Time Constant, Still Air 5 seconds Max. - Still Air 3
Thermal Time Constant, Well Stirred Oil 0.5 seconds Max. - Well Stirred Oil 3

CAD (KiCad official)

  • Symbol: 103JG1K
  • Footprint: Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal
  • 3D model: DO-35 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Littelfuse datasheet (5 pp, sha256 28a657af1b28affe, retrieved 2026-10-26, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary two-terminal convention (convention), consensus off (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