# LRBM25GJER0038S

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

LRBM25GJER0038S from NCT, 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 large-electrode (S type) terminal of the 2512 current-sense resistor, 3W rated, 1~4 mΩ range with maximum rated current 54.77 A and overload current 122.47 A. |
| 2 | 2 | passive | Second large-electrode (S type) terminal of the 2512 current-sense resistor, interchangeable with the first; 4-wire resistance measuring points are on the rear electrodes (A 5.60±0.25 mm, B 2.00±0.25 mm). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | NCT |
| 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 range (LRB*25**S 3 W row) | R | 1 |  | 4 | mΩ | LRB*25**S, 3 W row | 3 |
| Resistance tolerance (code J) |  | -5 |  | 5 | % | Precision code J = ±5% | 2 |
| Temperature coefficient of resistance (TCR) | TCR | -50 |  | 50 | ppm/°C | LRB*25**S, 3 W row; measured room temperature to 125 °C | 3 |
| Operating temperature range |  | -55 |  | 170 | °C |  | 3 |
| Maximum rated power | P |  |  | 3 | W | LRB*25**S, 3 W row; derate above 70 °C per power derating curve | 3 |
| Maximum rated current | I |  |  | 54.77 | A | LRB*25**S, 3 W row | 3 |
| Maximum overload current | I |  |  | 122.47 | A | LRB*25**S, 3 W row | 3 |
| Short time overload resistance change | ΔR/R | -0.5 |  | 0.5 | % | 5 s overload at 5 times rated power (2512 3 W), 24 h rest | 5 |
| Biased humidity resistance change | ΔR/R | -0.5 |  | 0.5 | % | 85 °C/85 %RH, 10% rated power, 1000 h | 5 |
| Temperature cycling resistance change | ΔR/R | -0.5 |  | 0.5 | % | -55 °C to +150 °C, 1000 cycles | 5 |
| Low temperature exposure resistance change | ΔR/R | -0.5 |  | 0.5 | % | -55 °C, 96 h | 5 |
| High temperature exposure resistance change | ΔR/R | -1 |  | 1 | % | 170 °C, 1000 h | 5 |
| Load life resistance change | ΔR/R | -1 |  | 1 | % | 70 °C, rated power 90 min ON / 30 min OFF, 1000 h | 5 |
| Resistance to solder heat resistance change | ΔR/R | -0.5 |  | 0.5 | % | 260 °C solder bath, 10 s | 5 |
| Terminal bending resistance change | ΔR/R | -0.5 |  | 0.5 | % | 2.5 kg, 2 mm deflection, 60 s under load | 5 |

## CAD (KiCad official)

- Symbol: `LRBM25GJER0038S`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `lrbm25gjer0038s-etched.step` / `lrbm25gjer0038s-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lrbm25gjer0038s.step` / `lrbm25gjer0038s.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [NCT datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756687552638537728) (6 pp, sha256 `13512fac2aa9df8a`, retrieved 2026-11-06, 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/lrbm25gjer0038s-datasheet.pdf)