# NT04104F3950B1F

**EATON** · NTC Thermistors · 0402

NT04104F3950B1F from EATON, in a 0402. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1 | passive | Thermistor terminal 1. Non-polarized end electrode of the monolithic NTC element; interchangeable with pin 2. 10 kΩ ±1% at 25 °C, resistance varies with temperature per B25/50 = 3950 K over -40 °C to +125 °C. |
| 2 | 2 | passive | Thermistor terminal 2. Non-polarized end electrode of the monolithic NTC element; interchangeable with pin 1. 10 kΩ ±1% at 25 °C, resistance varies with temperature per B25/50 = 3950 K over -40 °C to +125 °C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | EATON |
| Package | 0402 |
| Category | Sensors |
| Pins | 2 |

## Ordering variants

Same part, different packaging or reel option.

- `NT04104F3950B1F`
- `NT04104?3950B1*`
- `NT04104F3950B1FNT06104?3950B1*`
- `NT04104F3950B1FNT08104?3950B1*`

## CAD (KiCad official)

- Symbol: `NT04104F3950B1F`
- Footprint: `Resistor_SMD:R_0402_1005Metric`
- 3D model: 0402 (KiCad packages3D, STEP)
- 3D model files: `nt04104f3950b1f-etched.step` / `nt04104f3950b1f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `nt04104f3950b1f.step` / `nt04104f3950b1f.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [EATON datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8597522893219905536) (None pp, sha256 `688178e2f2dd29f8`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/nt04104f3950b1f-datasheet.pdf)