# RBJ-12RR120FT

**FH Guangdong Fenghua Advanced Tech** · Current Sense Resistors / Shunt Resistors · 2512

RBJ-12RR120FT from FH Guangdong Fenghua Advanced Tech, 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 of the 2512 chip current-sense resistor, an external electrode (6.30±0.20 mm long body) with the recommended land pattern in the datasheet's pad-dimension table. |
| 2 | 2 | passive | Second terminal of the 2512 chip current-sense resistor, an external electrode at the opposite end of the body, interchangeable with the first because the resistor is non-polarised. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | FH Guangdong Fenghua Advanced Tech |
| 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 |
| Temperature coefficient of resistance (code R) |  | -700 |  | 700 | ppm/°C | T.C.R code R; applies to resistance range 100~199 mΩ (page 3 table) | 1 |
| Max. overload voltage (2512) |  |  |  | 400 | V | AC RMS, ~100 V/s ramp between substrate and terminations, 60 s ±5 s | 4 |
| Insulation resistance |  | 1000 |  |  | MΩ | DC 100 V ±15 V between substrate and terminations, 1 min | 4 |
| ΔR endurance at 70°C | ΔR | -2 |  | 2 | %R | 1000 h at 70 ±2°C, rated voltage 1.5 h ON / 0.5 h OFF; plus 0.5 mΩ absolute term (not in min/max) | 4 |
| ΔR endurance at upper category temperature | ΔR | -1 |  | 1 | %R | 1000 h at 155 ±2°C; plus 0.5 mΩ absolute term (not in min/max) | 4 |
| ΔR component solvent resistance | ΔR | -1 |  | 1 | %R | Iso-propyl alcohol 23 ±5°C, 10 h; plus 0.5 mΩ absolute term (not in min/max) | 4 |
| ΔR operation at low temperature | ΔR | -1 |  | 1 | %R | -55 ±5°C, 1 h without load, rated voltage 45 min, 15 min without load; plus 0.5 mΩ absolute term (not in min/max) | 4 |
| ΔR damp heat, steady state | ΔR | -3 |  | 3 | %R | 40 ±2°C, 93 ±3% RH, 1000 h, rated voltage 1.5 h ON / 0.5 h OFF; plus 0.5 mΩ absolute term (mapping to be verified) | 4 |
| ΔR short time overload | ΔR | -1 |  | 1 | %R | 2.5 times rated voltage for 5 s; plus 0.5 mΩ absolute term (mapping to be verified) | 4 |
| ΔR rapid change of temperature | ΔR | -1 |  | 1 | %R | -55 (30 min) / normal (5 min) / 155 (30 min), 300 cycles; plus 0.5 mΩ absolute term (not in min/max) | 4 |
| ΔR substrate bending test | ΔR | -1 |  | 1 | %R | Bending distance 2 mm (2010/2512), duration 60 s ±5 s; plus 0.5 mΩ absolute term (not in min/max) | 3 |
| ΔR resistance to soldering heat | ΔR | -1 |  | 1 | %R | Lead-free solder bath 270 ±5°C, 10 s ±1 s; plus 0.5 mΩ absolute term (not in min/max) | 3 |
| Operating temperature range |  | -55 |  | 155 | °C |  | 2 |
| Rated power | P |  |  | 1 | W | Rating power at 70°C ambient (code J = 1 W); derate above 70°C per page-2 curve | 3 |
| Storage temperature |  | 5 |  | 30 | °C | Storage; suggested use within six months of receipt | 15 |
| Storage relative humidity | RH | 30 |  | 70 | % | Storage; suggested use within six months of receipt | 15 |

## CAD (KiCad official)

- Symbol: `RBJ-12RR120FT`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `rbj-12rr120ft-etched.step` / `rbj-12rr120ft-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rbj-12rr120ft.step` / `rbj-12rr120ft.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FH Guangdong Fenghua Advanced Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602958593184714752) (17 pp, sha256 `b0c89e8b81ab939d`, 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/rbj-12rr120ft-datasheet.pdf)