# LR122WF800NT4E

**UNI ROYAL Uniroyal Elec** · Current Sense Resistors / Shunt Resistors · 2512

LR122WF800NT4E from UNI ROYAL Uniroyal Elec, in a 2512. 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 | UNI ROYAL Uniroyal Elec |
| Package | 2512 |
| Category | Resistors |
| 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 |
|---|---|---|---|---|---|---|---|
| Short-time overload resistance change |  | -0.5 |  | 0.5 | % | Run at 5 times rated power for 5 s at room temperature; printed as ±(0.5%+0.0005Ω), the 0.0005 Ω absolute term is added to this limit | 2 |
| Soldering heat resistance change |  | -0.5 |  | 0.5 | % | Printed as ±(0.5%+0.0005Ω), the 0.0005 Ω absolute term is added to this limit; test conditions not printed | 2 |
| Thermal shock resistance change |  | -0.5 |  | 0.5 | % | Printed as ±(0.5%+0.0005Ω), the 0.0005 Ω absolute term is added to this limit; test conditions not printed | 2 |
| Load life resistance change |  | -1 |  | 1 | % | Printed as ±(1%+0.0005Ω), the 0.0005 Ω absolute term is added to this limit; test conditions not printed | 2 |
| Standard operating temperature |  | -55 |  | 170 | °C | Standard operating temperature range | 1 |
| Resistance tolerance (F code = ±1%) |  | -1 |  | 1 | % | Tolerance code F in part number | 2 |
| Nominal resistance (decoded from part number) | R |  | 5 |  | mΩ | Decoded from 500N in part number (500 × 10^-5 Ω); matches the 5mΩ example in the ordering procedure | 2 |
| Rated power (wattage code 2W) |  |  | 2 |  | W | Decoded from wattage code 2W in part number | 2 |

## CAD (KiCad official)

- Symbol: `LR122WF800NT4E`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `lr122wf800nt4e-etched.step` / `lr122wf800nt4e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lr122wf800nt4e.step` / `lr122wf800nt4e.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UNI ROYAL Uniroyal Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603149295214882816) (2 pp, sha256 `25d6b19b196c3aac`, retrieved 2026-10-20, 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/lr122wf800nt4e-datasheet.pdf)