# HoJLR2512-2W-9mR-1%

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

HoJLR2512-2W-9mR-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 terminal of the 2512 alloy current-sense resistor (2W, 9mR, ±1%), rated current I=√(P/R) with operating range -50°C to +170°C. |
| 2 | 2 | passive | Second terminal of the 2512 alloy current-sense resistor (2W, 9mR, ±1%), non-polarized and interchangeable with the other terminal, with recommended pad width A=4.0mm and pad length L=4.1mm. |

## 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 (suffix 1%, code F) |  | -1 |  | 1 | % | MPN suffix 1%; tolerance code F=±1% | 1 |
| Temperature coefficient of resistance | TCR | -50 |  | 50 | ppm/℃ | Resistance 2mR~500mR | 2 |
| Insulation resistance |  | 100 |  |  | MΩ | 100V DC for 1 minute | 4 |
| Operating temperature range |  | -50 |  | 170 | ℃ | Power derated above 70℃ per power curve | 2 |
| Resistance change, load life | ΔR | -1 |  | 1 | % | 1000 hours at rated power, 70℃, 1.5 hours ON, 0.5 hour OFF | 4 |
| Resistance change, short time overload | ΔR | -1 |  | 1 | % | 5 X rated power for 5s | 4 |
| Resistance change, moisture no load | ΔR | -1 |  | 1 | % | 85℃, 85%RH, 1000hrs | 4 |
| Resistance change, temperature cycle | ΔR | -1 |  | 1 | % | -55℃ & +155℃, 100 cycles, 15min per extreme condition | 4 |
| Resistance change, resistance to soldering heat | ΔR | -0.5 |  | 0.5 | % | 260±5℃ for 10±1 sec | 4 |
| Resistance change, high temperature exposure | ΔR | -1 |  | 1 | % | 155℃, 1000hrs | 4 |
| Resistance change, low temperature storage | ΔR | -1 |  | 1 | % | -55℃, 1000hrs | 4 |
| Resistance change, substrate bending | ΔR | -0.5 |  | 0.5 | % | Bending width 2mm | 4 |
| Rated power | P |  | 2 |  | W | 2W variant; derated above 70℃ ambient per power curve | 2 |

## CAD (KiCad official)

- Symbol: `HoJLR2512-2W-9mR-1%`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `hojlr2512-2w-9mr-1-etched.step` / `hojlr2512-2w-9mr-1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hojlr2512-2w-9mr-1.step` / `hojlr2512-2w-9mr-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/8590197829684518912) (4 pp, sha256 `3224518dbc8bdc85`, retrieved 2026-11-06, 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/hojlr2512-2w-9mr-1-datasheet.pdf)