# QN0805X103F3450FB

**QAMcn** · NTC Thermistors · 0805

QN0805X103F3450FB from QAMcn, in a 0805. 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 | One end electrode of the chip NTC thermistor, 10 kΩ ±1% at 25℃, B(25/50℃) 3450 K ±1%, operating temperature -40 to +125℃; non-polarized and interchangeable with the other terminal. |
| 2 | 2 | passive | Other end electrode of the chip NTC thermistor, 10 kΩ ±1% at 25℃, rated power 100 mW at 25℃, permissible operating current 0.44 mA; non-polarized and interchangeable with the other terminal. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | QAMcn |
| Package | 0805 |
| 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 (code F, ±1%) at 25℃ | R25 | -1 |  | 1 | % | Tolerance code F (±1%) per part-numbering table | 2 |
| B constant tolerance (code F, ±1%) | B | -1 |  | 1 | % | B-value tolerance code F (±1%) per part-numbering table | 2 |
| Thermal time constant |  |  |  | 5 | s | Printed as ＜5 s, zero-power condition | 2 |
| Operating ambient temperature |  | -40 |  | 125 | ℃ | Operating ambient temperature | 2 |
| Resistance at -40℃ (R-T table) | R | 195.784 | 203.814 | 212.153 | kΩ | R-T table, temperature -40℃ (R_Min / R_Cent / R_Max) | 10 |
| Resistance at 25℃ (R-T table) | R | 9.9 | 10 | 10.1 | kΩ | R-T table, temperature 25℃ (R_Min / R_Cent / R_Max) | 11 |
| Resistance at 85℃ (R-T table) | R | 1.358 | 1.399 | 1.441 | kΩ | R-T table, temperature 85℃ (R_Min / R_Cent / R_Max) | 12 |
| Resistance at 125℃ (R-T table) | R | 0.488 | 0.508 | 0.528 | kΩ | R-T table, temperature 125℃ (R_Min / R_Cent / R_Max) | 13 |
| Nominal zero-power resistance | R25 |  | 10 |  | kΩ | Zero-power resistance at 25℃ | 2 |
| B constant (25/50℃) | B |  | 3450 |  | K | B constant (25/50℃), calculation method B | 2 |
| B constant (25/85℃) | B |  | 3500 |  | K | B constant (25/85℃) as printed in electrical characteristics table | 2 |
| Permissible operating current |  |  | 0.44 |  | mA | 25℃ ambient | 2 |
| Dissipation factor |  |  | 2 |  | mW/℃ | Dissipation factor as printed | 2 |
| Rated electric power |  |  | 100 |  | mW | 25℃ ambient; power to raise surface temperature 100℃ by self-heating | 2 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | PC |  | The current that keep body temperature of chip NTC on the PC board in still air | 4 |

## CAD (KiCad official)

- Symbol: `QN0805X103F3450FB`
- Footprint: `Resistor_SMD:R_0805_2012Metric`
- 3D model: 0805 (KiCad packages3D, STEP)
- 3D model files: `qn0805x103f3450fb-etched.step` / `qn0805x103f3450fb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `qn0805x103f3450fb.step` / `qn0805x103f3450fb.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [QAMcn datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588934749071020032) (13 pp, sha256 `52d3e91845d88833`, retrieved 2026-10-18, 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-sonnet-5-5` (text+vision), consensus `claude-opus-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](docs/qn0805x103f3450fb-datasheet.pdf)