# HoLLR2512-2W-5mR-1%

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

HoLLR2512-2W-5mR-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 5 mΩ current-sense resistor (2512 body 6.4±0.2 x 3.2±0.2 mm); rated 3W max (2W per part number), 77.50 A max rated current, 173.2 A max overload current. |
| 2 | 2 | passive | Second terminal of the resistor, interchangeable with the first; recommended pad A 4.0±0.1, L 4.1±0.1, B 2.1±0.1 mm with a separate sensing trace taken from the pad inner edge. |

## 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 |
|---|---|---|---|---|---|---|---|
| Insulation resistance |  | 100 |  |  | MΩ | 100 VDC applied 1 min between electrodes and protective layer/substrate | 6 |
| Solderability (electrode solder coverage) |  | 95 |  |  | % | Immersed in 245±5°C solder bath 3±1 s; coverage of new solder on electrodes | 6 |
| Short time overload resistance change |  | -0.5 |  | 0.5 | % | 5 s overload at 2x rated power (3W), 24 h rest | 5 |
| Biased humidity resistance change |  | -0.5 |  | 0.5 | % | 85°C, 85%RH, rated current 90 min ON/30 min OFF, 1000 h | 5 |
| Temperature cycling resistance change |  | -0.5 |  | 0.5 | % | -55°C to +125°C, 1000 cycles | 5 |
| Low temperature exposure resistance change |  | -0.5 |  | 0.5 | % | -55±2°C, 1000 h | 5 |
| High temperature exposure resistance change |  | -1 |  | 1 | % | 170°C, 1000 h | 6 |
| Load life resistance change |  | -1 |  | 1 | % | 70±2°C, rated current 90 min ON/30 min OFF, 1000 h | 6 |
| Resistance to solder heat resistance change |  | -0.5 |  | 0.5 | % | 260±5°C solder bath, 10±1 s | 6 |
| Resistance to solvent resistance change |  | -0.5 |  | 0.5 | % | Isopropanol 20-25°C, 60±5 s | 6 |
| Joint strength of solder resistance change |  | -0.5 |  | 0.5 | % | Bend test board, load applied at board centre | 6 |
| Resistance tolerance (F grade) |  | -1 |  | 1 | % | Suffix 1% = F (±1%) | 1 |
| Temperature coefficient of resistance | TCR | -50 |  | 50 | ppm/°C | 1mΩ<R≤50mΩ (5mΩ part); R2 at 125°C vs R1 at room temperature | 2 |
| Operating temperature range |  | -55 |  | 170 | °C | 使用温度范围 (operating temperature range) for series | 2 |
| Resistance (nominal) |  |  | 5 |  | mΩ | Part number 5mR (R005 = 5mΩ resistance code) | 3 |

## CAD (KiCad official)

- Symbol: `HoLLR2512-2W-5mR-1%`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `hollr2512-2w-5mr-1-etched.step` / `hollr2512-2w-5mr-1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hollr2512-2w-5mr-1.step` / `hollr2512-2w-5mr-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/8590226662286651392) (7 pp, sha256 `6d7b599f634a8dff`, retrieved 2026-11-05, 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/hollr2512-2w-5mr-1-datasheet.pdf)