# ASMD1210-075

**Shenzhen JDT Fuse** · Resettable Fuses · 1210

ASMD1210-075 from Shenzhen JDT Fuse, 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 | Terminal pad 1 (tin-plated nickel-copper) of the non-polarized PTC; the 0.75 A hold, 1.50 A trip device is rated 6 V dc maximum and 100 A maximum fault current, and either pad may be used. |
| 2 | 2 | passive | Terminal pad 2 (tin-plated nickel-copper) of the non-polarized PTC, in series with pad 1 in the protected circuit; the device is rated 6 V dc maximum and 100 A maximum fault current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen JDT Fuse |
| 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 operating voltage (V max) | V max |  |  | 6 | V dc | Performance Specification table, ASMD1210-075 row | 3 |
| Maximum fault current (I max) | I max |  |  | 100 | A | At rated voltage (V max) | 3 |
| Hold current @25°C (I hold) | I hold |  |  | 0.75 | A | 25°C still air | 3 |
| Trip current @25°C (I trip) | I trip | 1.5 |  |  | A | 25°C still air | 3 |
| Maximum device resistance one hour post reflow (R1max) | R1max |  |  | 0.4 | Ω | Measured one hour post reflow | 3 |
| Power dissipation in tripped state (Pd) | Pd |  | 0.6 |  | W | Tripped state, 25°C still air, at rated voltage | 3 |
| Ambient operating temperature |  | -40 |  | 85 | °C | Ambient operating conditions | 4 |
| Maximum surface temperature in tripped state |  |  |  | 125 | °C | Surface temperature of the device in the tripped state | 4 |
| Storage temperature |  | 0 |  | 35 | °C | Storage condition | 5 |
| Storage relative humidity |  |  |  | 70 | %RH | Storage condition | 5 |

## 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 Nickel-Copper | 6 |

## CAD (KiCad official)

- Symbol: `ASMD1210-075`
- Footprint: `Fuse:Fuse_1210_3225Metric`
- 3D model: 1210 (KiCad packages3D, STEP)
- 3D model files: `asmd1210-075-etched.step` / `asmd1210-075-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `asmd1210-075.step` / `asmd1210-075.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shenzhen JDT Fuse datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588899519735451648) (9 pp, sha256 `c42b669570fcef47`, 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/asmd1210-075-datasheet.pdf)