# JER1206FAR120

**jieerrui** · Current Sense Resistors / Shunt Resistors · 1206

JER1206FAR120 from jieerrui, in a 1206. 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 | 1206 |
| 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 (1206, 0.5W) | R | 110 |  | 200 | mΩ | 1206, 0.5W rated power; code R120 = 120mΩ | 2 |
| Resistance tolerance |  | -1 |  | 1 | % | Tolerance code F = 1% | 1 |
| Temperature coefficient of resistance | TCR | -50 |  | 50 | ppm/°C | 1206, 0.5W, 110mΩ~200mΩ | 2 |
| Rated power | P |  |  | 0.5 | W | Part code A = 1/2W; derate above 70°C ambient | 1 |
| Operating temperature range |  | -55 |  | 170 | °C | Operating Temperature Range | 3 |
| Short time overload resistance change | ΔR | -1 |  | 1 | % | 5.0x rated power, 5 s (IEC60115-1 4.13) | 6 |
| Temperature cycling resistance change | ΔR | -1 |  | 1 | % | -55/+125°C, 1000 cycles (JESD22 JA-104) | 6 |
| High temperature exposure resistance change | ΔR | -1 |  | 1 | % | 125°C, 1000 h (MIL-STD-202 108) | 6 |
| Low temperature storage resistance change | ΔR | -1 |  | 1 | % | -55°C, 45 min (IEC60115-1 4.23.4) | 6 |
| Biased humidity resistance change | ΔR | -1 |  | 1 | % | 10% operating power, 85°C/85%RH, 1000 h | 6 |
| Operational life resistance change | ΔR | -1 |  | 1 | % | 70±2°C, rated current, 1000 +48/-0 h | 7 |
| Vibration resistance change | ΔR | -1 |  | 1 | % | 5g, 10-2000 Hz, 12 cycles (MIL-STD-202 204) | 7 |
| Resistance to solder heat resistance change | ΔR | -1 |  | 1 | % | 260±5°C, 10±1 s (IEC60115-1 4.18) | 7 |
| Terminal bending resistance change | ΔR | -1 |  | 1 | % | 2 mm deflection, 60 s (AEC-Q200-005) | 7 |
| Mechanical shock resistance change | ΔR | -1 |  | 1 | % | 100g, 6 ms half sine (MIL-STD-202 213) | 7 |
| Terminal strength resistance change | ΔR | -1 |  | 1 | % | 17.7N, 60±1 s (AEC-Q200-006) | 7 |
| Thermal shock resistance change | ΔR | -1 |  | 1 | % | -55/+125°C, 300 cycles (MIL-STD-202 107) | 7 |
| ESD resistance change | ΔR | -1 |  | 1 | % | 2 kV, 2 times, 1 s interval (AEC-Q200-002) | 7 |
| Resistance (nominal) | R |  | 120 |  | mΩ | Part code R120 | 1 |

## CAD (KiCad official)

- Symbol: `JER1206FAR120`
- Footprint: `Resistor_SMD:R_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `jer1206far120-etched.step` / `jer1206far120-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `jer1206far120.step` / `jer1206far120.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [jieerrui datasheet](docs/jer1206far120-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/jer1206far120-datasheet.pdf)