# HoLLR2512-3W-27mR-1%

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

HoLLR2512-3W-27mR-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 | Terminal 1 of an unpolarised resistor; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised resistor; either orientation. |

## 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 | % |  | 2 |
| Temperature coefficient of resistance (TCR) | TCR | -40 |  | 40 | ppm/°C | 1mΩ<R≤500mΩ | 3 |
| Operating temperature range |  | -55 |  | 170 | °C |  | 3 |
| Rated power | P |  |  | 3 | W | Derate above 70°C per power curve | 3 |
| Short time overload resistance change | ΔR/R | -0.5 |  | 0.5 | % | 5 s overload at 2× rated power (3W), measured after 24 h rest | 6 |
| Biased humidity resistance change | ΔR/R | -0.5 |  | 0.5 | % | 85°C±5°C, 85±5%RH, rated current, 90 min ON/30 min OFF, 1000 h | 6 |
| Temperature cycling resistance change | ΔR/R | -0.5 |  | 0.5 | % | -55°C to +125°C, 1000 cycles | 6 |
| Low temperature exposure (storage) resistance change | ΔR/R | -0.5 |  | 0.5 | % | -55±2°C, 1000 h | 6 |
| High temperature exposure (storage) resistance change | ΔR/R | -1 |  | 1 | % | 170°C, 1000 h | 7 |
| Load life resistance change | ΔR/R | -1 |  | 1 | % | 70±2°C, rated current, 90 min ON/30 min OFF, 1000 h | 7 |
| Resistance to solder heat resistance change | ΔR/R | -0.5 |  | 0.5 | % | 260±5°C solder bath, 10±1 s | 7 |
| Resistance to solvent resistance change | ΔR/R | -0.5 |  | 0.5 | % | Isopropyl alcohol 20-25°C, 60±5 s, 24 h rest | 7 |
| Insulation resistance | R_ins | 100 |  |  | MΩ | 100 VDC applied for 1 min, electrode to protective coating and to substrate | 7 |
| Joint strength of solder resistance change | ΔR/R | -0.5 |  | 0.5 | % | Board bend test, load applied at centre of test board | 7 |
| Nominal resistance | R |  | 27 |  | mΩ | MPN HoLLR2512-3W-27mR-1% | 1 |

## CAD (KiCad official)

- Symbol: `HoLLR2512-3W-27mR-1%`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `hollr2512-3w-27mr-1-etched.step` / `hollr2512-3w-27mr-1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hollr2512-3w-27mr-1.step` / `hollr2512-3w-27mr-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/8603386050383527936) (9 pp, sha256 `675c43dd8835a46f`, 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`, 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/hollr2512-3w-27mr-1-datasheet.pdf)