# JK-SMD1210-075-24

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

JK-SMD1210-075-24 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 | Non-polarized terminal pad (tin-plated nickel-copper) of the PPTC; rated 24 Vdc max, 0.75 A hold and 1.50 A trip at 25℃, with 0.070 to 0.45 Ω initial resistance. |
| 2 | 2 | passive | Second non-polarized terminal pad of the PPTC, interchangeable with the other pad; rated 24 Vdc max, 100 A max interrupt current, operating temperature -40℃ to 85℃. |

## 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 (rated voltage) | Vmax |  |  | 24 | Vdc |  | 1 |
| Maximum current (Imax) | Imax |  |  | 100 | A |  | 1 |
| Maximum time to trip |  |  |  | 0.1 | Sec | 25℃, 8.0 A | 1 |
| Minimum initial resistance | Rimin | 0.07 |  |  | Ω | 25℃ | 1 |
| Maximum initial resistance (R1max) | R1max |  |  | 0.45 | Ω | 25℃ | 1 |
| Operating temperature |  | -40 |  | 85 | ℃ |  | 1 |
| Hold current (Ihold) | Ihold |  | 0.75 |  | A | 25℃, 60 min, no trip | 1 |
| Trip current (Itrip) | Itrip |  | 1.5 |  | A | 25℃ | 1 |
| Typical initial resistance (Rityp) | Rityp |  | 0.23 |  | Ω | 25℃ | 1 |
| Power dissipation (Pd) | Pd |  | 0.6 |  | W |  | 1 |

## 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 pad materials :Tin-Plated Nickle-copper | 1 |

## CAD (KiCad official)

- Symbol: `JK-SMD1210-075-24`
- Footprint: `Fuse:Fuse_1210_3225Metric`
- 3D model: 1210 (KiCad packages3D, STEP)
- 3D model files: `jk-smd1210-075-24-etched.step` / `jk-smd1210-075-24-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `jk-smd1210-075-24.step` / `jk-smd1210-075-24.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/8588907135992541184) (3 pp, sha256 `aaa5e53f94ec0664`, 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-smd1210-075-24-datasheet.pdf)