component
103JG1K
Public Made by Adomby adom
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, primarytwo-terminal convention(convention), consensusoff(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).
# 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](docs/103jg1k-datasheet.pdf) (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](docs/103jg1k-datasheet.pdf)