# FPM253WJR050TM

**FOJAN** · Current Sense Resistors / Shunt Resistors · 2512

FPM253WJR050TM from FOJAN, in a 2512. 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 50 mΩ (R050) alloy current-sense resistor, rated 3 W at 70 °C, 38 A rated current, 86 A max overload, with Sn-plated electrode on a 6.4 x 3.2 mm body. |
| 2 | 2 | passive | Second terminal of the 50 mΩ (R050) alloy current-sense resistor, interchangeable with terminal 1 (non-polarized), operating range -55 °C to 170 °C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | FOJAN |
| Package | 2512 |
| 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 |  |  | 50 |  | mΩ | nominal, catalog attribute (LCSC C7420015) | catalog |
| Tolerance |  | -5 |  | 5 | % | catalog attribute (LCSC C7420015) | catalog |
| Rated power |  |  |  | 3 | W | catalog attribute (LCSC C7420015) | catalog |

## CAD (KiCad official)

- Symbol: `FPM253WJR050TM`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `fpm253wjr050tm-etched.step` / `fpm253wjr050tm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fpm253wjr050tm.step` / `fpm253wjr050tm.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FOJAN datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8763504957620400128) (11 pp, sha256 `20558dfb235c52df`, retrieved 2026-10-19, 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/fpm253wjr050tm-datasheet.pdf)