# JK-SMD1210-200L-12

**Jinrui Electronic Materials Co** · Resettable Fuses · 1210

JK-SMD1210-200L-12 from Jinrui Electronic Materials Co, in a 1210. 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 | One terminal of the non-polarized resettable PPTC fuse (tin-plated nickel-copper end termination); IH 2.0 A, IT 4.0 A, VMAX 12.0 V, IMAX 50.0 A for the -12 variant. |
| 2 | 2 | passive | Second terminal of the non-polarized PPTC fuse, interchangeable with the other terminal; device resistance is 0.006 Ω min to 0.035 Ω max (R1MAX) at 25°C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Jinrui Electronic Materials Co |
| Package | 1210 |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum voltage (VMAX), -12 variant | VMAX |  |  | 12 | V | Maximum continuous voltage at rated current | 2 |
| Maximum fault current (IMAX) | IMAX |  |  | 50 | A | Maximum fault current at rated voltage | 2 |
| Hold current (IH) | IH |  |  | 2 | A | 30 min at IH, 25℃ still air, no trip | 2 |
| Trip current (IT) | IT | 4 |  |  | A | 25℃ still air | 2 |
| Maximum time to trip |  |  |  | 3 | Sec | At specified current 8.0 A, VMAX, 25℃ | 2 |
| Minimum device resistance (RiMIN) | RiMIN | 0.006 |  |  | Ω | In still air at 25℃, prior to tripping | 2 |
| Maximum device resistance (R1MAX) | R1MAX |  |  | 0.035 | Ω | In still air at 25℃, measured one hour post reflow | 2 |
| Typical power dissipation (PD) | PD |  | 0.8 |  | W | 25℃ still air | 2 |
| Passive aging resistance change |  | -10 |  | 10 | % | 85℃, 1000 hours; typical | 5 |
| Humidity aging resistance change |  | -5 |  | 5 | % | 85℃/85%RH, 100 hours; typical | 5 |
| Thermal shock resistance change |  |  | -30 |  | % | MIL-STD-202 Method 107G, +85℃/-40℃, 20 times; typical | 5 |
| Operating temperature range |  | -40 |  | 85 | ℃ | Operating temperature | 1 |
| Maximum storage ambient temperature |  |  |  | 40 | ℃ | Storage; higher storage temperatures may deform packaging | 8 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | tin | Terminal Materials Tin-Plated Nickle-copper | 5 |

## CAD (KiCad official)

- Symbol: `JK-SMD1210-200L-12`
- Footprint: `Fuse:Fuse_1210_3225Metric`
- 3D model: 1210 (KiCad packages3D, STEP)
- 3D model files: `jk-smd1210-200l-12-etched.step` / `jk-smd1210-200l-12-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `jk-smd1210-200l-12.step` / `jk-smd1210-200l-12.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Jinrui Electronic Materials Co datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590454767597494272) (8 pp, sha256 `c9d3ae5bba577b21`, retrieved 2026-10-18, tier: lcsc)
- **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/jk-smd1210-200l-12-datasheet.pdf)