# MSR12A1R011F2

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

MSR12A1R011F2 from prosemi, 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 | prosemi |
| 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 (code F = ±1%) |  | -1 |  | 1 | % | Resistance tolerance code F per part-numbering table; P/R | 1 |
| Temperature coefficient of resistance | TCR | -50 |  | 50 | ppm/℃ | Resistance range 5~20 mΩ (MSR12A, 11 mΩ) | 1 |
| Short time overload resistance change |  | -1 |  | 1 | % | 5 s overload at 3 times rated power, 10<R≤20 mΩ, 1206 | 5 |
| Resistance to soldering heat resistance change |  | -0.5 |  | 0.5 | % | 260℃±5℃, 12 s±0.5 s | 5 |
| Temperature cycling resistance change |  | -1 |  | 1 | % | -55℃ (15 min)/+150℃ (15 min), 300 cycles | 5 |
| Low temperature storage resistance change |  | -1 |  | 1 | % | -55℃ for 1000 hours, no power | 5 |
| High temperature storage resistance change |  | -1 |  | 1 | % | 150℃ for 1000 hours, no power | 5 |
| Bias humidity resistance change |  | -2 |  | 2 | % | +85℃, 85% RH, 10% bias, 1000 hours; 11~20 mΩ | 5 |
| Vibration resistance change |  | -0.5 |  | 0.5 | % | 5g's for 20 minutes, 12 cycles each of 3 orientations, 10 Hz - 2000 Hz | 5 |
| Operational life resistance change |  | -3 |  | 3 | % | 1206, 10~14 mΩ; 70℃±2℃, 1000 hours, at rated power 1.5 h ON, 0.5 h OFF | 5 |
| Moisture resistance resistance change |  | -0.5 |  | 0.5 | % | MIL-STD-202 method 106, no power, 7b not required | 5 |
| Operation temperature range |  | -55 |  | 150 | ℃ | Operation temperature range | 1 |
| Power rating at 70℃ | P |  | 1 |  | W | Rated power at 70℃ for MSR12A; derate above 70℃ per curve on page 4 | 1 |

## CAD (KiCad official)

- Symbol: `MSR12A1R011F2`
- Footprint: `Resistor_SMD:R_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `msr12a1r011f2-etched.step` / `msr12a1r011f2-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `msr12a1r011f2.step` / `msr12a1r011f2.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [prosemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590918849653399552) (7 pp, sha256 `216066e52aa868f6`, 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/msr12a1r011f2-datasheet.pdf)