# S1206-FC-2.5A

**SART Nanjing Sart Tech** · Disposable Fuses · 1206

S1206-FC-2.5A from SART Nanjing Sart Tech, 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 | Fuse terminal 1 (silver termination), non-polarized; S1206-FC-2.5A is rated 2.5 A, 100 V, with 50 A at 100 V DC interrupting rating. |
| 2 | 2 | passive | Fuse terminal 2 (silver termination), non-polarized; interchangeable with terminal 1, typical cold DCR 64.5 mΩ. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | SART Nanjing Sart Tech |
| 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 |
|---|---|---|---|---|---|---|---|
| Voltage Rating |  |  |  | 100 | V |  | 1 |
| Interrupting Rating |  |  |  | 50 | A | 100V DC | 1 |
| Opening time at 100% of current rating |  | 4 |  |  | hours | 100% of current rating, no fusing | 3 |
| Opening time at 350% of current rating |  |  |  | 5 | sec | 350% of current rating | 3 |
| Opening time at 1000% of current rating |  | 0.1 |  |  | ms | 1000% of current rating | 3 |
| Voltage Drop |  |  |  | 300 | mV | 100% of current rating | 4 |
| Endurance resistance change /ΔR/ | ΔR |  |  | 10 | % | Endurance: 100 cycles of 1In, then 1.25In | 4 |
| Endurance temperature rise | ΔT |  |  | 75 | ℃ | Endurance: 100 cycles of 1In, then 1.25In | 4 |
| Operating temperature |  | -55 |  | 125 | ℃ | operating temperature | 1 |
| Recommended storage ambient temperature |  | 5 |  | 30 | ℃ | storage | 6 |
| Recommended storage relative humidity |  | 25 |  | 60 | %RH | storage | 6 |
| Infrared reflow peak temperature |  |  |  | 260 | ℃ | infrared reflow, 5 sec max | 5 |
| Wave soldering reservoir temperature |  |  |  | 260 | ℃ | wave soldering, 10 sec max in reservoir | 5 |
| Hand soldering temperature |  |  |  | 350 | ℃ | hand soldering, 5 sec max | 5 |
| Current Rating |  |  | 2.5 |  | A |  | 1 |
| Typical cold DCR |  |  | 64.5 |  | mΩ | measured at ≤10% rated current and 25℃; resistance on coating surface | 1 |
| Typical I2T | I2T |  | 0.125 |  | A2s | melting I2T at 10 times rated current | 1 |

## CAD (KiCad official)

- Symbol: `S1206-FC-2.5A`
- Footprint: `Fuse:Fuse_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `s1206-fc-2-5a-etched.step` / `s1206-fc-2-5a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `s1206-fc-2-5a.step` / `s1206-fc-2-5a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [SART Nanjing Sart Tech datasheet](docs/s1206-fc-2-5a-datasheet.pdf) (6 pp, sha256 `245a6bbea43c2eb1`, 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/s1206-fc-2-5a-datasheet.pdf)