# HoSRX1206-1W-1mR-1%

**Milliohm** · Current Sense Resistors / Shunt Resistors · 1206

HoSRX1206-1W-1mR-1% from Milliohm, in a 1206. 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 | 1206 |
| 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 |  | -1 |  | 1 | % |  | 3 |
| Temperature coefficient of resistance | TCR | -50 |  | 50 | ppm/°C | R1 at room temp, R2 at 85°C; TCR=(R2-R1)/(R1×(T2-T1))×10 as printed | 3 |
| Operating temperature range |  | -55 |  | 170 | °C |  | 3 |
| Short-time overload resistance change | ΔR | -0.5 |  | 0.5 | % | 5 times rated power for 5 s, JIS-C-5201 | 5 |
| Bending strength resistance change | ΔR | -0.5 |  | 0.5 | % | 2 mm bending, at least 60 s support, AEC Q200-005 | 5 |
| Solderability solder coverage |  | 95 |  |  | % | Soldering 245±5°C, immersion 3±0.5 s, J-STD-002 | 5 |
| Solvent resistance resistance change | ΔR | -0.5 |  | 0.5 | % | Isopropyl alcohol 20-25°C, 60±5 s, rest over 24 h, MIL-STD-202 Method 215 | 5 |
| Solder heat resistance change | ΔR | -0.5 |  | 0.5 | % | 260±5°C tin bath, 10±1 s, rest at least 60 min | 5 |
| Temperature cycling resistance change | ΔR | -0.5 |  | 0.5 | % | 1000 cycles (-55~155°C), 30 min dwell, 15°C/min, electrical test within 24±4 h | 5 |
| High-temperature storage resistance change | ΔR | -0.5 |  | 0.5 | % | 1000 h at 155°C, no power applied | 5 |
| Biased humidity resistance change | ΔR | -0.5 |  | 0.5 | % | 1000 h at 85°C, 85% RH, loaded with 10% rated power | 5 |
| Load life resistance change | ΔR | -0.5 |  | 0.5 | % | Rated current, Ta=125°C, 100% power, 0.5 h off/1.5 h on, 1000 h | 5 |
| Low-temperature storage resistance change | ΔR | -0.5 |  | 0.5 | % | -55°C, storage 1000 h | 5 |
| Mechanical shock resistance change | ΔR | -0.5 |  | 0.5 | % | Half-sine pulse X, Y, Z, 0.5 ms, peak 100 g | 5 |
| Vibration resistance change | ΔR | -0.5 |  | 0.5 | % | 10 to 2000 Hz, 20 min sweep, 12 cycles per axis (36 total) | 5 |
| Rated power |  |  | 1 |  | W | Rated power as printed (1W) | 3 |
| Rated current |  |  | 31.62 |  | A | Printed next to the 1mR selection example, no conditions given | 3 |
| Nominal resistance | R |  | 1 |  | mR | Value from MPN 1mR | 3 |

## CAD (KiCad official)

- Symbol: `HoSRX1206-1W-1mR-1%`
- Footprint: `Resistor_SMD:R_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `hosrx1206-1w-1mr-1-etched.step` / `hosrx1206-1w-1mr-1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hosrx1206-1w-1mr-1.step` / `hosrx1206-1w-1mr-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/8758016761780686848) (7 pp, sha256 `00a3c2ec3663f922`, 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/hosrx1206-1w-1mr-1-datasheet.pdf)