# RE1206F1R040

**jieerrui** · Current Sense Resistors / Shunt Resistors · 1206

RE1206F1R040 from jieerrui, 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 | 1 | passive | One terminal of the 40 mΩ (R040) 1% alloy current-sense resistor, rated 1 W for the 1206 size, operating from -55°C to +170°C. |
| 2 | 2 | passive | Second terminal of the non-polarized 40 mΩ (R040) alloy current-sense resistor, interchangeable with the other terminal, with 1206 solder pad guidance of a=1.8 mm, b=1.7 mm, L=1.6 mm. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | jieerrui |
| 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 |  |  | 40 |  | mΩ | nominal, catalog attribute (LCSC C46961740) | catalog |
| Tolerance |  | -1 |  | 1 | % | catalog attribute (LCSC C46961740) | catalog |
| Rated power |  |  |  | 1 | W | catalog attribute (LCSC C46961740) | catalog |

## CAD (KiCad official)

- Symbol: `RE1206F1R040`
- Footprint: `Resistor_SMD:R_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `re1206f1r040-etched.step` / `re1206f1r040-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `re1206f1r040.step` / `re1206f1r040.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [jieerrui datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604448694930722816) (7 pp, sha256 `206d1ece05f76881`, retrieved 2026-10-22, 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/re1206f1r040-datasheet.pdf)