# HoCG25123R004F4

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

HoCG25123R004F4 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 |
|---|---|---|---|---|---|---|---|
| Operating temperature range |  | -55 |  | 170 | °C | Printed as -55℃~170℃ in the 2512 product parameter table | 1 |
| Resistance tolerance (F = ±1% decoded from part number) |  | -1 |  | 1 | % | Tolerance code F in HoCG25123R004F4; selection example HoCG25123R010F4 decodes F as 1% | 1 |
| Resistance temperature coefficient (TCR) | TCR | -25 |  | 25 | ppm/°C | 2mΩ~5mΩ range, ±25ppm row; test +25 to +125°C, reference +25°C | 1 |
| Max. rated current |  |  |  | 38.72 | A | 2mΩ~5mΩ range row (2W/3W); power rating not printed beside this value | 1 |
| Max. overload current |  |  |  | 86.6 | A | 2mΩ~5mΩ range row (2W/3W) | 1 |
| Parasitic inductance |  |  |  | 3 | nH | Printed as ＜3nH in the 2512 product parameter table | 1 |
| Nominal resistance (decoded from part number R004) | R |  | 4 |  | mΩ | HoCG25123R004F4 = 4 mΩ; within 2mΩ~5mΩ range | 2 |
| Rated power | P |  | 3 |  | W | Power code 3 in part number (selection example: 2512 3 W); rated at 70°C in load-life test | 2 |
| Resistance change after short-term overload | ΔR | -1 |  | 1 | % | 5 times rated power, 5 seconds | 3 |
| Resistance change after temperature cycle | ΔR | -0.5 |  | 0.5 | % | -55@30min~+155@30min, 1000 cycles | 3 |
| Resistance change after withstand welding heat | ΔR | -0.5 |  | 0.5 | % | 260±5, 10±1 sec | 3 |

## CAD (KiCad official)

- Symbol: `HoCG25123R004F4`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `hocg25123r004f4-etched.step` / `hocg25123r004f4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hocg25123r004f4.step` / `hocg25123r004f4.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Milliohm datasheet](docs/hocg25123r004f4-datasheet.pdf) (6 pp, sha256 `4f5223f606bff753`, retrieved 2026-10-17, tier: lcsc)
- **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/hocg25123r004f4-datasheet.pdf)