# LRAM12SFTR050

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

LRAM12SFTR050 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 | Terminal 1 of an unpolarised resistor; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised resistor; either orientation. |

## 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 |
|---|---|---|---|---|---|---|---|
| Resistance tolerance (code F = ±1%) |  | -1 |  | 1 | % | Part-number code F = 1% (D=0.5%, G=2%, J=5%) | 2 |
| Temperature coefficient of resistance | TCR | -50 |  | 50 | ppm/°C | ±50 ppm/°C row for LRA*12** at 1 W, 2~100 mΩ range; TCR = (R2-R1)/(R1·(T2-T1)) with T1 room, T2 125 °C | 3 |
| Operating temperature range |  | -55 |  | 170 | °C | 使用温度范围 for LRA*12** series | 3 |
| Rated power | P |  |  | 0.5 | W | Part-number code S = 1/2W (printed as 1/2W); power derated above 70 °C per derating curve | 2 |
| Short-time overload resistance change | ΔR/R | -0.5 |  | 0.5 | % | 5 s overload at 5 times rated power (1206), rest 24 h | 5 |
| Biased humidity resistance change | ΔR/R | -0.5 |  | 0.5 | % | 85 °C / 85% RH, 10% rated power, 1000 h, rest 24±4 h | 5 |
| Temperature cycling resistance change | ΔR/R | -0.5 |  | 0.5 | % | -55 °C to +150 °C, 1000 cycles, 15 min dwell, rest 24±4 h | 5 |
| Low temperature exposure resistance change | ΔR/R | -0.5 |  | 0.5 | % | -55±2 °C, 96 h, rest over 1 h | 5 |
| High temperature exposure resistance change | ΔR/R | -1 |  | 1 | % | 170 °C, 1000 h, rest 24±4 h | 5 |
| Load life resistance change | ΔR/R | -1 |  | 1 | % | 70±2 °C, rated power 90 min ON / 30 min OFF, 1000 h, rest over 1 h | 5 |
| Resistance to solder heat resistance change | ΔR/R | -0.5 |  | 0.5 | % | 260±5 °C solder bath, 10±1 s, rest over 1 h | 5 |
| Terminal bending resistance change | ΔR/R | -0.5 |  | 0.5 | % | 2.5 kg force, 2 mm deflection, held 60 s | 5 |

## CAD (KiCad official)

- Symbol: `LRAM12SFTR050`
- Footprint: `Resistor_SMD:R_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `lram12sftr050-etched.step` / `lram12sftr050-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lram12sftr050.step` / `lram12sftr050.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/8608758273512255488) (6 pp, sha256 `13512fac2aa9df8a`, retrieved 2026-11-06, 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`, 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/lram12sftr050-datasheet.pdf)