# SMD0805P100TFT

**PTTC Polytronics Tech** · Resettable Fuses · 0805

SMD0805P100TFT from PTTC Polytronics Tech, in a 0805. 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 fuse; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised fuse; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | PTTC Polytronics Tech |
| Package | 0805 |
| 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 |
|---|---|---|---|---|---|---|---|
| Minimum resistance (initial, un-soldered state) | Rmin | 0.06 |  |  | Ω | initial un-soldered state | 2 |
| Maximum resistance after trip or reflow | R1max |  |  | 0.21 | Ω | 23 ºC, one hour after tripping or reflow soldering 260 ºC for 20 sec; PWB 0.020in x 1.5oz copper traces | 2 |
| Hold current (maximum current passed without tripping) | Ihold |  |  | 1 | A | 23 ºC still air | 3 |
| Maximum fault current device can withstand without damage | Imax |  |  | 40 | A | at rated voltage (Vmax) | 3 |
| Maximum time to trip |  |  |  | 0.3 | s | at fault current 8.00 A | 2 |
| Operating temperature |  | -40 |  | 85 | ºC |  | 7 |
| Maximum device surface temperature in tripped state |  |  |  | 125 | ºC | tripped state | 7 |
| Passive aging resistance change |  | -5 |  | 5 | % | +85ºC, 1000 hours; printed as ±5% typical resistance change | 7 |
| Humidity aging resistance change |  | -5 |  | 5 | % | +85ºC, 85%R.H., 1000 hours; printed as ±5% typical resistance change | 7 |
| Thermal shock resistance change |  | -30 |  |  | % | MIL-STD-202 Method 107G, +85ºC/-40ºC, 20 times; typical resistance change | 7 |
| Power dissipated in tripped state (typical) | Pd |  | 0.6 |  | W | tripped state, 23 ºC still air | 2 |
| Recommended hold current at ambient -40 ºC |  |  | 1.35 |  | A | ambient -40 ºC | 4 |
| Recommended hold current at ambient -20 ºC |  |  | 1.25 |  | A | ambient -20 ºC | 4 |
| Recommended hold current at ambient 0 ºC |  |  | 1.1 |  | A | ambient 0 ºC | 4 |
| Recommended hold current at ambient 23 ºC |  |  | 1 |  | A | ambient 23 ºC | 4 |
| Recommended hold current at ambient 40 ºC |  |  | 0.82 |  | A | ambient 40 ºC | 4 |
| Recommended hold current at ambient 50 ºC |  |  | 0.74 |  | A | ambient 50 ºC | 4 |
| Recommended hold current at ambient 60 ºC |  |  | 0.65 |  | A | ambient 60 ºC | 4 |
| Recommended hold current at ambient 70 ºC |  |  | 0.55 |  | A | ambient 70 ºC | 4 |
| Recommended hold current at ambient 85 ºC |  |  | 0.42 |  | A | ambient 85 ºC | 4 |

## 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 Material Solder-Plated Copper (Solder Material: Matte Tin (Sn)) | 8 |

## CAD (KiCad official)

- Symbol: `SMD0805P100TFT`
- Footprint: `Fuse:Fuse_0805_2012Metric`
- 3D model: 0805 (KiCad packages3D, STEP)
- 3D model files: `smd0805p100tft-etched.step` / `smd0805p100tft-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smd0805p100tft.step` / `smd0805p100tft.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [PTTC Polytronics Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589836834214871040) (10 pp, sha256 `9b0c360a32bdbfd1`, retrieved 2026-10-18, tier: lcsc)
- **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/smd0805p100tft-datasheet.pdf)