# QN0603X103F3450FB

**QAMcn** · NTC Thermistors · 0603

QN0603X103F3450FB from QAMcn, in a 0603. 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 | QAMcn |
| Package | 0603 |
| 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 at 25℃ (part-number code F) |  | -1 |  | 1 | % | Tolerance of resistance, code F = ±1% (part-number position ⑤) | 2 |
| B constant tolerance B(25/50) (part-number code F) |  | -1 |  | 1 | % | Tolerance of B constant, code F = ±1% (part-number position ⑦) | 2 |
| Operating ambient temperature |  | -40 |  | 125 | ℃ | Operating ambient temperature range | 2 |
| Thermal time constant |  |  |  | 5 | s |  | 2 |
| Rated electric power |  |  |  | 100 | mW | 25℃ | 2 |
| Resistance at -40℃ (R_Min / R_Cent / R_Max) | R_Cent | 195.784 | 203.814 | 212.153 | Kohm | R-T table, temperature -40℃ | 10 |
| Resistance at -20℃ (R_Min / R_Cent / R_Max) | R_Cent | 69.321 | 71.411 | 73.557 | Kohm | R-T table, temperature -20℃ | 10 |
| Resistance at 0℃ (R_Min / R_Cent / R_Max) | R_Cent | 27.443 | 28.007 | 28.58 | Kohm | R-T table, temperature 0℃ | 10 |
| Resistance at 25℃ (R_Min / R_Cent / R_Max) | R_Cent | 9.9 | 10 | 10.1 | Kohm | R-T table, temperature 25℃ | 11 |
| Resistance at 50℃ (R_Min / R_Cent / R_Max) | R_Cent | 4.004 | 4.081 | 4.159 | Kohm | R-T table, temperature 50℃ | 12 |
| Resistance at 85℃ (R_Min / R_Cent / R_Max) | R_Cent | 1.358 | 1.399 | 1.441 | Kohm | R-T table, temperature 85℃ | 12 |
| Resistance at 100℃ (R_Min / R_Cent / R_Max) | R_Cent | 0.904 | 0.935 | 0.967 | Kohm | R-T table, temperature 100℃ | 13 |
| Resistance at 125℃ (R_Min / R_Cent / R_Max) | R_Cent | 0.488 | 0.508 | 0.528 | Kohm | R-T table, temperature 125℃ | 13 |
| Nominal zero-power resistance | R25 |  | 10 |  | kΩ | Ambient temperature 25±0.05℃, measuring power ≤0.1mW | 2 |
| B constant (25/50) | B(25-50) |  | 3450 |  | K | Measured at 25±0.05℃ and 50±0.05℃ | 2 |
| B constant (25/85) | B(25-85) |  | 3500 |  | K | Measured at 25±0.05℃ and 85±0.05℃ | 2 |
| Permissible operating current |  |  | 0.31 |  | mA | 25℃ | 2 |
| Dissipation factor |  |  | 1 |  | mW/℃ |  | 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: `QN0603X103F3450FB`
- Footprint: `Resistor_SMD:R_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `qn0603x103f3450fb-etched.step` / `qn0603x103f3450fb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `qn0603x103f3450fb.step` / `qn0603x103f3450fb.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/8588934376558374912) (13 pp, sha256 `ae26ffa3522e296d`, retrieved 2026-10-21, 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`, 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/qn0603x103f3450fb-datasheet.pdf)