# JER2512F3R300

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

JER2512F3R300 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 | First terminal (electrode) of the 2512 alloy current-sense resistor, 3R300 = 300mΩ, 3W rated power, 1% tolerance; non-polarized. |
| 2 | 2 | passive | Second terminal (electrode) of the 2512 alloy current-sense resistor, 300mΩ, 3W rated power, 1% tolerance; non-polarized and interchangeable with the first terminal. |

## 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 (nominal value, code R300) | R |  | 300 |  | mΩ | Part-number code R300 = 300mΩ | 1 |
| Resistance tolerance (code F) |  | -1 |  | 1 | % | Tolerance code F = 1% | 1 |
| Temperature coefficient of resistance (TCR), 2mΩ~500mΩ range | TCR | -50 |  | 50 | ppm/℃ | IEC60115-1 4.8, room temp to +125℃ or +155℃; 2512 2mΩ~500mΩ row | 2 |
| Rated power | P |  |  | 3 | W | 2512 size, 3W code; derate above 70℃ ambient per curve | 1 |
| Insulation resistance |  | 100 |  |  | MΩ | Printed as >100MΩ for 2512 range | 2 |
| Operating temperature range |  | -55 |  | 170 | ℃ | Operating Temperature Range | 3 |
| Short time overload ΔR | ΔR | -1 |  | 1 | % | IEC60115-1 4.13; 5.0x rated power, 5 s | 6 |
| Temperature cycling ΔR | ΔR | -1 |  | 1 | % | JESD22 JA-104; -55℃/+125℃, 1000 cycles | 6 |
| High temperature exposure ΔR | ΔR | -1 |  | 1 | % | MIL-STD-202 108; 125℃, 1000 h | 6 |
| Low temperature operation ΔR | ΔR | -1 |  | 1 | % | IEC60115-1 4.23.4; -55℃, 45 min | 6 |
| Biased humidity ΔR | ΔR | -1 |  | 1 | % | MIL-STD-202 103; 10% operating power, 85℃/85%RH, 1000 h | 6 |
| Resistance to solder heat ΔR | ΔR | -1 |  | 1 | % | IEC60115-1 4.18; 260±5℃, 10±1 s | 7 |
| Operational life ΔR | ΔR | -1 |  | 1 | % | MIL-STD-202 108; 70±2℃, rated current 1.5 h on / 0.5 h off, 1000 h | 7 |
| Resistance to vibration ΔR | ΔR | -1 |  | 1 | % | MIL-STD-202 204; 5g, 10-2000 Hz, 12 cycles | 7 |
| Mechanical shock ΔR | ΔR | -1 |  | 1 | % | MIL-STD-202 213; 100g, half sine, 6 ms | 7 |
| Terminal bending ΔR | ΔR | -1 |  | 1 | % | AEC-Q200-005; 2 mm deflection, 60 s | 7 |
| Terminal strength ΔR | ΔR | -1 |  | 1 | % | AEC-Q200-006; 17.7 N, 60±1 s | 7 |
| Thermal shock ΔR | ΔR | -1 |  | 1 | % | MIL-STD-202 107; -55/+125℃, 300 cycles | 7 |
| ESD ΔR | ΔR | -1 |  | 1 | % | AEC-Q200-002; 2 kV, 2 times | 7 |

## CAD (KiCad official)

- Symbol: `JER2512F3R300`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `jer2512f3r300-etched.step` / `jer2512f3r300-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `jer2512f3r300.step` / `jer2512f3r300.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [jieerrui datasheet](docs/jer2512f3r300-datasheet.pdf) (7 pp, sha256 `6c0d359d39546b43`, 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/jer2512f3r300-datasheet.pdf)