# FRM252WJR300TK

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

FRM252WJR300TK 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 end electrode of the 2512 alloy current-sense resistor (300mΩ part, Sn-plated terminal); rated 2 W at 70°C, 63 A rated current for the 2512 type. |
| 2 | 2 | passive | Second end electrode of the 2512 alloy current-sense resistor; Kelvin four-terminal sensing points (V and A) are on the bottom of each electrode, 5.6±0.25 mm apart (dimension A). |

## 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 |  |  | 300 |  | mΩ | nominal, catalog attribute (LCSC C7420025) | catalog |
| Tolerance |  | -5 |  | 5 | % | catalog attribute (LCSC C7420025) | catalog |
| Rated power |  |  |  | 2 | W | catalog attribute (LCSC C7420025) | catalog |
| Temperature coefficient | TCR | -50 |  | 50 | ppm/°C | catalog description (LCSC C7420025) | catalog |

## CAD (KiCad official)

- Symbol: `FRM252WJR300TK`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `frm252wjr300tk-etched.step` / `frm252wjr300tk-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `frm252wjr300tk.step` / `frm252wjr300tk.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/8763504992097984512) (12 pp, sha256 `13a1c74e6b23cc10`, 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/frm252wjr300tk-datasheet.pdf)