# TLC-FSMD020

**TLC Electronic** · Resettable Fuses · 0603

TLC-FSMD020 from TLC Electronic, in a 0603. 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 PPTC terminal; TLC-FSMD020 is rated IH 0.20 A hold, IT 0.50 A trip, Vmax 9 V, Imax 40 A. |
| 2 | 2 | passive | Non-polarized PPTC terminal; interchangeable with the other terminal, resistance 0.55 Ω min to 3.50 Ω max (R1 max after trip/reflow). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TLC Electronic |
| Package | 0603 |
| 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 (time-to-trip) time |  |  |  | 0.6 | Sec. |  | 1 |
| Max voltage (V max) | V max |  |  | 9 | V |  | 1 |
| Max current (I max) | I max |  |  | 40 | A |  | 1 |
| Minimum resistance (R min) | R min | 0.55 |  |  | Ω |  | 1 |
| Maximum resistance after trip (R1 max) | R1 max |  |  | 3.5 | Ω |  | 1 |
| Power dissipation (Pd) | Pd |  | 0.5 |  | W |  | 1 |
| Hold current (IH) | IH |  | 0.2 |  | A |  | 1 |
| Trip current (IT) | IT |  | 0.5 |  | A |  | 1 |
| Hold current vs ambient temperature |  |  | 0.27 |  | A | Ambient -40℃ | 1 |
| Hold current vs ambient temperature |  |  | 0.25 |  | A | Ambient -20℃ | 1 |
| Hold current vs ambient temperature |  |  | 0.23 |  | A | Ambient 0℃ | 1 |
| Hold current vs ambient temperature |  |  | 0.2 |  | A | Ambient 25℃ | 1 |
| Hold current vs ambient temperature |  |  | 0.17 |  | A | Ambient 40℃ | 1 |
| Hold current vs ambient temperature |  |  | 0.14 |  | A | Ambient 50℃ | 1 |
| Hold current vs ambient temperature |  |  | 0.12 |  | A | Ambient 60℃ | 1 |
| Hold current vs ambient temperature |  |  | 0.1 |  | A | Ambient 70℃ | 1 |
| Hold current vs ambient temperature |  |  | 0.07 |  | A | Ambient 85℃ | 1 |

## CAD (KiCad official)

- Symbol: `TLC-FSMD020`
- Footprint: `Fuse:Fuse_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `tlc-fsmd020-etched.step` / `tlc-fsmd020-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tlc-fsmd020.step` / `tlc-fsmd020.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TLC Electronic datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588883637928398848) (2 pp, sha256 `263d6f399e56f898`, 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/tlc-fsmd020-datasheet.pdf)