# HoYLR2512-3W-25mR-1%

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

HoYLR2512-3W-25mR-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 | One end terminal of the 25 mΩ ±1% current-sense alloy resistor (3 W rated, max rated current 10.95 A, operating range -55 °C to +170 °C), non-polarized and interchangeable with the other terminal. |
| 2 | 2 | passive | Other end terminal of the 25 mΩ ±1% current-sense alloy resistor (3 W rated at 70 °C, derating to 0 at 170 °C), non-polarized and interchangeable with the other terminal. |

## 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 |
|---|---|---|---|---|---|---|---|
| Nominal resistance | R |  | 25 |  | mR |  | 3 |
| Resistance tolerance |  | -1 |  | 1 | % |  | 3 |
| Temperature coefficient of resistance | TCR | -50 |  | 50 | ppm/℃ |  | 3 |
| Rated power | P |  | 3 |  | W | Rated power; derate when resistor temperature reaches 70 ℃ (power curve) | 4 |
| Maximum rated current | I |  |  | 10.95 | A |  | 3 |
| Operating temperature range |  | -55 |  | 170 | ℃ |  | 3 |
| Pre-heat zone temperature |  | 150 |  | 180 | ℃ | Pre-heat zone, 90±30 s | 4 |
| Soldering zone temperature |  | 230 |  |  | ℃ | Soldering zone, 30±10 s | 4 |
| Insulation resistance |  | 100 |  |  | MΩ | 100 V ±15 V DC applied 60 s between electrode and substrate | 5 |
| Resistance change, temperature coefficient test | ΔR | -1 |  | 1 | % | +25 ℃ to +125 ℃; ΔR ≤ ±(1%+0.05mΩ) | 5 |
| Resistance change, heat resistance | ΔR | -0.5 |  | 0.5 | % | 270 ℃ solder bath 10 s; ΔR ≤ ±(0.5%+0.05mΩ) | 5 |
| Resistance change, bending test | ΔR | -0.5 |  | 0.5 | % | Bending distance 2 mm, held 60 s; ΔR ≤ ±(0.5%+0.05mΩ) | 5 |
| Resistance change, long-term high temperature | ΔR | -1 |  | 1 | % | 170 ℃ for 1000 h; ΔR ≤ ±(1.0%+0.05mΩ) | 5 |
| Resistance change, long-term low temperature | ΔR | -0.5 |  | 0.5 | % | -55 ℃ for 1000 h; ΔR ≤ ±(0.5%+0.05mΩ) | 5 |
| Resistance change, temperature cycling | ΔR | -0.5 |  | 0.5 | % | -55 ℃ 30 min to 155 ℃ 30 min, 1000 cycles; ΔR ≤ ±(0.5%+0.05mΩ) | 5 |
| Resistance change, long-term endurance | ΔR | -1 |  | 1 | % | 70 ℃ ±2 ℃, 1000 h, rated power, 1.5 h on / 0.5 h off; ΔR ≤ ±(1.0%+0.05mΩ) | 5 |
| Resistance change, long-term humidity | ΔR | -1 |  | 1 | % | 85 ℃ ±2 ℃, 85 ±3 %RH, 1000 h, rated power, 1.5 h on / 0.5 h off; ΔR ≤ ±(1.0%+0.05mΩ) | 5 |

## CAD (KiCad official)

- Symbol: `HoYLR2512-3W-25mR-1%`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `hoylr2512-3w-25mr-1-etched.step` / `hoylr2512-3w-25mr-1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hoylr2512-3w-25mr-1.step` / `hoylr2512-3w-25mr-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/8775167745602269184) (7 pp, sha256 `c5cb965b02f443b7`, retrieved 2026-11-01, 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/hoylr2512-3w-25mr-1-datasheet.pdf)