# LRBK25EFER110

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

LRBK25EFER110 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 | Terminal 1 of an unpolarised resistor; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised resistor; either orientation. |

## 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 | R | 101 |  | 500 | mΩ |  | 6 |
| Maximum rated power | P |  |  | 2 | W |  | 6 |
| Maximum rated current | I |  |  | 4.45 | A |  | 6 |
| Maximum overload current |  |  |  | 3.16 | A |  | 6 |
| Temperature coefficient of resistance | TCR | -100 |  | 100 | ppm/°C | R≥101mΩ | 6 |
| Operating temperature range | T | -55 |  | 170 | °C |  | 6 |
| Resistance change after short time overload | ΔR/R | -0.5 |  | 0.5 | % | 5 s overload at X5 rated power (2W for LRBK25), 24 h rest, JIS-C5201 | 10 |
| Resistance change after biased humidity | ΔR/R | -0.5 |  | 0.5 | % | 85±5°C, 85±5%RH, rated current, 90 min ON/30 min OFF, 1000 h | 11 |
| Resistance change after temperature cycling | ΔR/R | -0.5 |  | 0.5 | % | -55°C to +125°C, 1000 cycles | 11 |
| Resistance change after low temperature exposure | ΔR/R | -0.5 |  | 0.5 | % | -55±2°C, 1000 h | 11 |
| Resistance change after high temperature exposure | ΔR/R | -1 |  | 1 | % | 170°C, 1000 h | 11 |
| Resistance change after load life | ΔR/R | -1 |  | 1 | % | 70±2°C, rated current, 90 min ON/30 min OFF, 1000 h | 11 |
| Resistance change after resistance to solder heat | ΔR/R | -0.5 |  | 0.5 | % | Immersed in 260±5°C solder bath, 10±1 s | 11 |
| Electrode new-solder coverage |  | 95 |  |  | % | Immersed 245±5°C, 3±1 s; must be greater than 95% | 11 |
| Resistance change after resistance to solvent | ΔR/R | -0.5 |  | 0.5 | % | Isopropyl alcohol 20~25°C, 60±5 s | 11 |
| Insulation resistance |  | 100 |  |  | MΩ | 100 VDC applied for 1 min between electrodes and protective layer / substrate | 12 |
| Resistance change after joint strength of solder | ΔR/R | -0.5 |  | 0.5 | % | Load applied at centre of bend test board | 12 |

## CAD (KiCad official)

- Symbol: `LRBK25EFER110`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `lrbk25efer110-etched.step` / `lrbk25efer110-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lrbk25efer110.step` / `lrbk25efer110.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/8589837483531014144) (15 pp, sha256 `1c7bbc6a4c0f07fe`, 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/lrbk25efer110-datasheet.pdf)