# PWR03FTFV49R9

**Viking Tech** · Current Sense Resistors / Shunt Resistors · 0603

PWR03FTFV49R9 from Viking Tech, in a 0603. 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 of the two interchangeable end terminals (external electrode) of the 0603 PWR03 chip resistor, 1.60 mm x 0.80 mm body, max operating voltage 50V (75V for the 1/4W version) and max overload voltage 100V (150V for the 1/4W version). |
| 2 | 2 | passive | The other interchangeable end terminal (external electrode) of the 0603 PWR03 chip resistor, non-polar, operating temperature range -55 to +155C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Viking Tech |
| Package | 0603 |
| Category | Resistors |
| Pins | 2 |

## Electrical characteristics

Limits from the LCSC catalog entry for this part (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Resistance |  |  | 49.9 |  | Ω | nominal, catalog attribute (LCSC C5120079) | catalog |
| Tolerance |  | -1 |  | 1 | % | catalog attribute (LCSC C5120079) | catalog |
| Temperature coefficient | TCR | -200 |  | 200 | ppm/°C | catalog description (LCSC C5120079) | catalog |

## CAD (KiCad official)

- Symbol: `PWR03FTFV49R9`
- Footprint: `Resistor_SMD:R_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `pwr03ftfv49r9-etched.step` / `pwr03ftfv49r9-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pwr03ftfv49r9.step` / `pwr03ftfv49r9.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Viking Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590340216008708096) (12 pp, sha256 `4e1813ff49d67d6d`, retrieved 2026-11-01, 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/pwr03ftfv49r9-datasheet.pdf)