# JER2512F3R120

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

JER2512F3R120 from jieerrui, 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 | Terminal 1 of an unpolarised resistor; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised resistor; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | jieerrui |
| 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 (code F = 1%) |  | -1 |  | 1 | % | Part-number tolerance code F | 1 |
| Temperature coefficient of resistance (2512, 3W row, 2mΩ~500mΩ) | TCR | -50 |  | 50 | ppm/℃ | Resistance range 2mΩ~500mΩ; test per IEC60115-1 4.8 | 2 |
| Insulation resistance (2512) |  | 100 |  |  | MΩ | Resistance range 0.5mΩ~500mΩ, as printed in 2512 row | 2 |
| Rated power (2512, part code 3 = 3W) | P |  |  | 3 | W | Part-number power code 3; load power to be derated above 70℃ per curve | 2 |
| Resistance range (2512) | R | 0.5 |  | 500 | mΩ | 2512 row of resistance range table | 2 |
| Nominal resistance (code R120) | R |  | 120 |  | mΩ | Part-number resistance code R120 = 120mΩ per marking table | 2 |
| Operating temperature range |  | -55 |  | 170 | ℃ | Operating temperature range as printed | 3 |

## CAD (KiCad official)

- Symbol: `JER2512F3R120`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `jer2512f3r120-etched.step` / `jer2512f3r120-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `jer2512f3r120.step` / `jer2512f3r120.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [jieerrui datasheet](docs/jer2512f3r120-datasheet.pdf) (7 pp, sha256 `6c0d359d39546b43`, retrieved 2026-10-17, 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`, 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/jer2512f3r120-datasheet.pdf)