# SMF12M1FR041T

**SART Nanjing Sart Tech** · Current Sense Resistors / Shunt Resistors · 1206

SMF12M1FR041T from SART Nanjing Sart Tech, in a 1206. 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 | Terminal 1 | passive | One end termination of the 1206 current-sense resistor (A = 0.50±0.20 mm for R≥5 mΩ), non-polarized and interchangeable with the other terminal; rated 1.0 W at 70℃ with 200 mm² total solder pad trace size. |
| 2 | Terminal 2 | passive | Opposite end termination of the 1206 current-sense resistor, non-polarized and interchangeable with the other terminal; operating temperature range -55℃ to +170℃. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | SART Nanjing Sart Tech |
| Package | 1206 |
| Category | Resistors |
| Pins | 2 |

## Electrical characteristics

Limits from the LCSC catalog entry for this part (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Resistance |  |  | 41 |  | mΩ | nominal, catalog attribute (LCSC C845289) | catalog |
| Tolerance |  | -1 |  | 1 | % | catalog attribute (LCSC C845289) | catalog |
| Rated power |  |  |  | 1 | W | catalog attribute (LCSC C845289) | catalog |
| Temperature coefficient | TCR | -50 |  | 50 | ppm/°C | catalog description (LCSC C845289) | catalog |

## CAD (KiCad official)

- Symbol: `SMF12M1FR041T`
- Footprint: `Resistor_SMD:R_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `smf12m1fr041t-etched.step` / `smf12m1fr041t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smf12m1fr041t.step` / `smf12m1fr041t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [SART Nanjing Sart Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590228600478588928) (7 pp, sha256 `8ece06e9735a9059`, retrieved 2026-11-07, tier: lcsc)
- **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/smf12m1fr041t-datasheet.pdf)