# nSMD200

**TECHFUSE** · Resettable Fuses · 1206

nSMD200 from TECHFUSE, 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 | One end termination of the non-polarized PPTC (tin-plated nickel-copper); nSMD200 is rated Ihold 2.00 A, Itrip 3.50 A, Vmax 6.0 Vdc, Imax 100 A. |
| 2 | 2 | passive | Opposite end termination of the non-polarized PPTC, soldered to a 1.0 mm by 1.9 mm pad per the recommended layout, with 2.0 mm pad spacing as dimensioned. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECHFUSE |
| Package | 1206 |
| 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 (Vmax) | Vmax |  |  | 6 | Vdc | at rated current (Imax) | 1 |
| Maximum fault current (Imax) | Imax |  |  | 100 | A | at rated voltage (Vmax) | 1 |
| Maximum hold current (Ihold) | Ihold |  |  | 2 | A | 25°C still air | 1 |
| Minimum trip current (Itrip) | Itrip | 3.5 |  |  | A | 25°C still air | 1 |
| Minimum resistance prior to tripping (Rimin) | Rimin | 0.018 |  |  | Ω | 25°C | 1 |
| Maximum resistance one hour post reflow (R1max) | R1max |  |  | 0.08 | Ω | measured one hour post reflow | 1 |
| Maximum time to trip |  |  |  | 1.5 | s |  | 1 |
| Power dissipation in tripped state (Pd) | Pd |  | 0.8 |  | W | tripped state, 25°C still air, at rated voltage | 1 |
| Maximum surface temperature in tripped state |  |  |  | 125 | °C | device in tripped state | 1 |
| Ambient operating temperature |  | -40 |  | 85 | °C | ambient operating conditions | 1 |
| Storage temperature |  |  |  | 40 | °C | storage, max 70% R.H. | 3 |

## 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 | 2 |

## CAD (KiCad official)

- Symbol: `nSMD200`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `nsmd200-etched.step` / `nsmd200-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `nsmd200.step` / `nsmd200.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECHFUSE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586176185146986496) (3 pp, sha256 `986063e150e61039`, retrieved 2026-10-17, 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/nsmd200-datasheet.pdf)