# NCP18XW682E03RB

**Murata Electronics** · NTC Thermistors · 0603

NCP18XW682E03RB from Murata Electronics, 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 | Murata Electronics |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum Operating Current (25°C) |  |  |  | 0.121 | mA | 25°C; current that raises thermistor temperature by max 0.1°C | 12 |
| Maximum Voltage |  |  |  | 5 | V |  | 12 |
| Resistance tolerance | R25 | -3 |  | 3 | % | Resistance at 25°C; tolerance code E = ±3% | 12 |
| B-Constant (25-50°C) tolerance | B25/50 | -3 |  | 3 | % | B-Constant 25-50°C; printed ±3% | 12 |
| Operating Temperature Range |  | -40 |  | 125 | °C |  | 12 |
| Storage temperature |  | -10 |  | 40 | °C | Storage; humidity less than 75%RH (not dewing condition) | 19 |
| Typical Dissipation Constant (25°C) |  |  | 1 |  | mW/°C | 25°C; still air, per datasheet definition | 12 |
| Resistance (25°C) | R25 |  | 6.8 |  | kΩ | Zero-power resistance at 25°C; nominal for this MPN | 12 |
| B-Constant (25-50°C) | B25/50 |  | 3950 |  | K | Calculated between 25°C and 50°C; nominal, tolerance ±3% | 12 |
| B-Constant (25-80°C) reference value | B25/80 |  | 3982 |  | K | Reference value, 25-80°C | 12 |
| B-Constant (25-85°C) reference value | B25/85 |  | 3987 |  | K | Reference value, 25-85°C | 12 |
| B-Constant (25-100°C) reference value | B25/100 |  | 3998 |  | K | Reference value, 25-100°C | 12 |

## 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 |
|---|---|---|---|---|
| contacts | Copper |  | ø0.3mm Copper Lead Wire with Polyurethane Coat | 5 |

## CAD (KiCad official)

- Symbol: `NCP18XW682E03RB`
- Footprint: `Resistor_SMD:R_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `ncp18xw682e03rb-etched.step` / `ncp18xw682e03rb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ncp18xw682e03rb.step` / `ncp18xw682e03rb.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Murata Electronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588935763690340352) (37 pp, sha256 `65ce16b3b8439eb4`, retrieved 2026-10-18, 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/ncp18xw682e03rb-datasheet.pdf)