# RL12FTNR270

**TA I Tech** · Current Sense Resistors / Shunt Resistors · 1206

RL12FTNR270 from TA I Tech, 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 | TA I Tech |
| 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 | % | Tolerance code F (±1%) per part-numbering table; E96 series | 2 |
| Temperature coefficient of resistance, 100~500mΩ range | TCR | -300 |  | 300 | ppm/℃ | Resistance 100~500mΩ; JIS C 5201-1-4.8 | 2 |
| Operation temperature range |  | -55 |  | 155 | ℃ | Operation temperature range | 2 |
| Resistance value range | R | 100 |  | 910 | mΩ | Resistance value range; JIS C 5201-1-4.5 | 2 |
| Insulation resistance |  | 100 |  |  | MΩ | Over 100; JIS C 5201-1-4.6 | 2 |
| Short time overload resistance change (1%, plus 0.005Ω term) | ΔR | -1 |  | 1 | % | 2.5 X rated voltage, 5s; limit ±(1%+0.005Ω) for 1% series | 3 |
| Load life resistance change (1%, plus 0.001Ω term) | ΔR | -1 |  | 1 | % | 1000 hours at rated power, 70℃, 1.5 hours ON, 0.5 hour OFF; limit ±(1%+0.001Ω) | 3 |
| Load life with humidity resistance change (1%, plus 0.001Ω term) | ΔR | -1 |  | 1 | % | 1000 hours at rated power, 40±2℃, 90~95% RH, 1.5 hours ON, 0.5 hour OFF; limit ±(1%+0.001Ω) | 3 |
| Rapid change of temperature resistance change (1%, plus 0.005Ω term) | ΔR | -1 |  | 1 | % | -55℃ (30 min) / +155℃ (30 min), 5 cycles; limit 1%+0.005Ω | 3 |
| Resistance to soldering heat resistance change (1%, plus 0.005Ω term) | ΔR | -1 |  | 1 | % | 270±5℃ solder, 10±1 sec dwell; limit 1%+0.005Ω | 3 |
| Robustness of termination resistance change (1%, plus 0.005Ω term) | ΔR | -1 |  | 1 | % | 3mm deflection; limit 1%+0.005Ω | 3 |
| Resistance to dry heat resistance change (1%, plus 0.005Ω term) | ΔR | -1 |  | 1 | % | 155±5℃ for 96±4 hrs; limit (1%+0.005Ω) for 1% series | 3 |
| Storage temperature |  | 5 |  | 35 | ℃ | Storage conditions | 9 |
| Storage humidity |  | 40 |  | 75 | % | Storage conditions | 9 |
| Power rating (RL12, 1206) | P |  | 0.5 |  | W | Printed as 1/2W for RL12 | 2 |

## CAD (KiCad official)

- Symbol: `RL12FTNR270`
- Footprint: `Resistor_SMD:R_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `rl12ftnr270-etched.step` / `rl12ftnr270-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rl12ftnr270.step` / `rl12ftnr270.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TA I Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590449487899353088) (10 pp, sha256 `069cfb2527f1dc62`, 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/rl12ftnr270-datasheet.pdf)