# FRM252WJR010TN

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

FRM252WJR010TN 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 electrode of the 10 mΩ (R010) alloy current-sense resistor, rated 2 W at 70 °C and 63 A rated current (141 A max overload) for the 2512 type. |
| 2 | 2 | passive | Second terminal electrode of the 2512 resistor (interchangeable with the first); resistance is measured by Kelvin four-terminal sensing at the V/A points on the bottom of the electrodes. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | FOJAN |
| Package | 2512 |
| 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 (J code, ±5%) |  | -5 |  | 5 | % | Part-number tolerance code J = ±5% | 2 |
| Temperature coefficient of resistance (2512 type) | TCR | -50 |  | 50 | ppm/°C | Measuring points 25°C and +125°C, reference point +25°C | 5 |
| Operating temperature range |  | -55 |  | 170 | °C |  | 5 |
| Max overload current (2512) |  |  |  | 141 | A |  | 5 |
| Resistance change after high temperature exposure (storage) | ΔR | -1 |  | 1 | % | T=170℃, 1000 hrs, measured 24 hrs after test | 6 |
| Resistance change after low temperature exposure (storage) | ΔR | -0.5 |  | 0.5 | % | T=-55℃, 1000 hours, measured 24 hrs after test | 6 |
| Resistance change after temperature cycling | ΔR | -0.5 |  | 0.5 | % | 1000 cycles (-55℃ to 125℃), measured 24 hrs after test | 6 |
| Resistance change after short time overload | ΔR | -0.5 |  | 0.5 | % | 5 X rated power for 5 s | 6 |
| Resistance change after moisture resistance | ΔR | -1 |  | 1 | % | 24 hours/cycle, 10 cycles, zero power | 6 |
| Resistance change after biased humidity | ΔR | -0.5 |  | 0.5 | % | 10% rated power at 85℃, RH 85%, 1000 hrs | 6 |
| Resistance change after load life | ΔR | -1 |  | 1 | % | 1000 h at +70 °C, 1.5 h ON, 0.5 h OFF | 7 |
| Resistance change after resistance to soldering heat | ΔR | -0.5 |  | 0.5 | % | 260±5℃ solder, 10±1 sec dwell | 7 |
| Resistance change after mechanical shock | ΔR | -0.5 |  | 0.5 | % | 100 g's, 6 ms half sine, 3 times each of 6 directions | 7 |
| Resistance change after vibration | ΔR | -0.5 |  | 0.5 | % | 5 g's for 20 min, 12 cycles, 10-2000 Hz | 7 |
| Resistance change after board flex | ΔR | -0.5 |  | 0.5 | % | Min 2 mm deflection, 60 s | 7 |
| Resistance change after thermal shock | ΔR | -1 |  | 1 | % | -55°C/+155°C, 1000 cycles | 7 |
| Resistance change after ESD test | ΔR | -1 |  | 1 | % | Direct contact ±6kV; air discharge +12kV, +16kV, +25kV | 7 |
| Rated power at P70 (2512) | P70 |  | 2 |  | W | at P70 | 5 |
| Rated current (2512) |  |  | 63 |  | A |  | 5 |
| Dielectric withstanding voltage |  |  | 500 |  | V DC | Listed in Features | 2 |

## CAD (KiCad official)

- Symbol: `FRM252WJR010TN`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `frm252wjr010tn-etched.step` / `frm252wjr010tn-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `frm252wjr010tn.step` / `frm252wjr010tn.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/8763505022632382464) (12 pp, sha256 `13a1c74e6b23cc10`, retrieved 2026-11-07, 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/frm252wjr010tn-datasheet.pdf)