# LR2512D-2W-1mR-1%

**Milliohm** · Current Sense Resistors / Shunt Resistors · 2512

LR2512D-2W-1mR-1% from Milliohm, 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 | First Ni/Sn-plated end terminal of the 2512D alloy current-sense resistor (1 mΩ, 2 W, ±1%), with recommended pad b = 3.15 mm for 0.25~1 mΩ values. |
| 2 | 2 | passive | Second Ni/Sn-plated end terminal of the 2512D alloy current-sense resistor, non-polarized and interchangeable with the first, with a 1.15 mm pad gap L for 0.25~1 mΩ values. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Milliohm |
| 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 |
|---|---|---|---|---|---|---|---|
| Resistance tolerance (1% option) |  | -1 |  | 1 | % | Accuracy class 1% printed for this MPN | 2 |
| Load life (1000 h at rated power) |  | -1 |  | 1 | % | 1000 hours at rated power, 70℃, 1.5 hours ON, 0.5 hour OFF | 4 |
| Short time overload |  | -0.5 |  | 0.5 | % | 5 X rated power for 5s | 4 |
| Moisture, no load |  | -1 |  | 1 | % | 85℃, 85%RH, 1000hrs | 4 |
| Temperature cycle |  | -0.5 |  | 0.5 | % | -55℃ & +155℃, 300 cycles, 15 min per extreme condition | 4 |
| Resistance to soldering heat |  | -0.5 |  | 0.5 | % | 260±5℃ for 20±1 sec | 4 |
| High temperature exposure |  | -1 |  | 1 | % | 170℃, 1000hrs | 4 |
| Low temperature storage |  | -0.5 |  | 0.5 | % | -55℃, 1000hrs | 4 |
| Substrate bending |  | -1 |  | 1 | % | Bending width 2mm | 4 |
| Insulation resistance |  | 100 |  |  | MΩ | 100V DC for 1 minute | 4 |
| Temperature coefficient of resistance (TCR) | TCR |  |  | 50 | ppm/℃ | Printed as ≤25-50 ppm/℃ for the whole series; test +25℃ ~ +125℃ (reference 4.0) | 1 |
| Operating temperature range |  | -55 |  | 170 | ℃ | Operating Temperature Range | 2 |
| Nominal resistance | R |  | 1 |  | mR | Value from MPN LR2512D-2W-1mR-1% | 2 |
| Rated power | P |  | 2 |  | W | 2W option for this MPN; power derating curve referenced at 70℃ ambient | 2 |

## CAD (KiCad official)

- Symbol: `LR2512D-2W-1mR-1%`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `lr2512d-2w-1mr-1-etched.step` / `lr2512d-2w-1mr-1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lr2512d-2w-1mr-1.step` / `lr2512d-2w-1mr-1.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Milliohm datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588937480397590528) (6 pp, sha256 `adcf1fdda6b012e8`, retrieved 2026-11-07, 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/lr2512d-2w-1mr-1-datasheet.pdf)