# LRAN12CFTR033

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

LRAN12CFTR033 from NCT, 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 | One end electrode of the alloy current-sense resistor (1% F tolerance, 33 mΩ per the R033 code), rated 1 W for 1 mΩ to 39 mΩ parts, with resistance measured 4-wire on the back electrodes. |
| 2 | 2 | passive | Opposite end electrode of the alloy current-sense resistor, non-polarized and interchangeable with the other terminal, with TCR ±50 ppm/°C and an operating range of -55 to +170 °C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | NCT |
| 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 |
|---|---|---|---|---|---|---|---|
| Tolerance (code F = ±1%) |  | -1 |  | 1 | % |  | 3 |
| Temperature coefficient of resistance (TCR) | TCR | -50 |  | 50 | ppm/°C | 1W family, 1mΩ~39mΩ range | 4 |
| Rated power |  |  | 1 | 1 | W | Code C = 1W (1mΩ~39mΩ); derate above 70°C | 4 |
| Maximum rated current |  |  |  | 31.62 | A | 1W row, family table value | 4 |
| Maximum overload current |  |  |  | 70.71 | A | 1W row, family table value | 4 |
| Operating temperature range |  | -55 |  | 170 | °C |  | 4 |
| Short time overload, resistance change |  | -0.5 |  | 0.5 | % | 5 s applied at X5 rated power, rest 24 h | 8 |
| Biased humidity, resistance change |  | -0.5 |  | 0.5 | % | 85°C/85%RH, rated current 90 min ON / 30 min OFF, 1,000 h | 8 |
| Temperature cycling, resistance change |  | -0.5 |  | 0.5 | % | -55°C to +125°C, 1000 cycles | 8 |
| Low temperature exposure (storage), resistance change |  | -0.5 |  | 0.5 | % | -55±2°C, 1000 h | 8 |
| High temperature exposure (storage), resistance change |  | -1 |  | 1 | % | 170°C, 1000 h | 9 |
| Load life, resistance change |  | -1 |  | 1 | % | 70±2°C, rated current 90 min ON / 30 min OFF, 1,000 h | 9 |
| Resistance to solder heat, resistance change |  | -0.5 |  | 0.5 | % | 260±5°C solder bath, 10±1 s | 9 |
| Resistance to solvent, resistance change |  | -0.5 |  | 0.5 | % | Isopropyl alcohol 20~25°C, 60±5 s | 9 |
| Joint strength of solder, resistance change |  | -0.5 |  | 0.5 | % | Bend test board, under load | 9 |
| Solderability, electrode solder coverage |  | 95 |  |  | % | 245±5°C solder bath, 3±1 s | 9 |
| Insulation resistance |  | 100 |  |  | MΩ | 100 VDC applied 1 min, electrode to protective layer and electrode to substrate | 9 |
| Storage temperature |  | 5 |  | 35 | °C | Sealed storage, shelf life 2 years, away from corrosive gases and direct sunlight | 11 |
| Storage relative humidity |  | 40 |  | 75 | %RH | Sealed storage, shelf life 2 years | 11 |

## CAD (KiCad official)

- Symbol: `LRAN12CFTR033`
- Footprint: `Resistor_SMD:R_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `lran12cftr033-etched.step` / `lran12cftr033-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lran12cftr033.step` / `lran12cftr033.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [NCT datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590297886187040768) (12 pp, sha256 `9468aafd42725899`, retrieved 2026-11-02, 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/lran12cftr033-datasheet.pdf)