# MSR12A1R010F2

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

MSR12A1R010F2 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 | First terminal of the 2-terminal MSR12A 1206 metal alloy current-sense resistor (1.5~20 mΩ, 1 W at 70°C), non-polarized and interchangeable with terminal 2. |
| 2 | 2 | passive | Second terminal of the 2-terminal MSR12A 1206 metal alloy current-sense resistor (1.5~20 mΩ, 1 W at 70°C), non-polarized and interchangeable with terminal 1. |

## 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-number table | 1 |
| Temperature coefficient of resistance (TCR) | TCR | -50 |  | 50 | ppm/℃ | 10 mΩ in 5~20 mΩ range (MSR12A, 1.0 W row) | 1 |
| Operating temperature range |  | -55 |  | 150 | ℃ | MSR12A | 1 |
| Peak reflow temperature (Pb-free) | TP |  |  | 260 | ℃ | Pb-free reflow; time within 5°C of peak 20-40 s | 4 |
| Short time overload resistance change | ΔR | -1 |  | 1 | % | Overload 5 s at 4× rated power, 1206, 1.5≤R≤10 mΩ | 5 |
| Solder coverage |  | 95 |  |  | % | Solderability: solder temp 245±5℃, dipping 3±0.5 s | 5 |
| Bias humidity resistance change | ΔR | -1 |  | 1 | % | +85℃, 85% RH, 10% bias, 1000 h; 1.5~10 mΩ | 5 |
| Temperature cycling resistance change | ΔR | -1 |  | 1 | % | -55℃ (15 min)/+150℃ (15 min), 300 cycles | 5 |
| Resistance to soldering heat resistance change | ΔR | -0.5 |  | 0.5 | % | 260℃±5℃, 12 s ±0.5 s | 5 |
| Low temperature storage resistance change | ΔR | -1 |  | 1 | % | -55℃, 1000 h, no power | 5 |
| High temperature storage resistance change | ΔR | -1 |  | 1 | % | 150℃, 1000 h, no power | 5 |
| Vibration resistance change | ΔR | -0.5 |  | 0.5 | % | 5g for 20 min, 12 cycles each of 3 orientations, 10 Hz-2000 Hz | 5 |
| Moisture resistance resistance change | ΔR | -0.5 |  | 0.5 | % | MIL-STD-202 method 106, no power | 5 |
| Operational life resistance change | ΔR | -3 |  | 3 | % | 70℃±2℃, 1000 h, rated power 1.5 h ON / 0.5 h OFF; 1206, 10~14 mΩ | 5 |
| Nominal resistance | R |  | 10 |  | mΩ | Resistance code R010 (decoded per marking/part-number table) | 3 |
| Rated power | P |  | 1 |  | W | Power rating at 70℃ | 1 |

## CAD (KiCad official)

- Symbol: `MSR12A1R010F2`
- Footprint: `Resistor_SMD:R_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `msr12a1r010f2-etched.step` / `msr12a1r010f2-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `msr12a1r010f2.step` / `msr12a1r010f2.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/8590918849670311936) (7 pp, sha256 `216066e52aa868f6`, retrieved 2026-11-08, tier: lcsc)
- **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/msr12a1r010f2-datasheet.pdf)