# TLC-MSMD125

**TLC Electronic** · Resettable Fuses · 1812

TLC-MSMD125 from TLC Electronic, in a 1812. 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 | TLC Electronic |
| Package | 1812 |
| 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 trip current | IT | 2.5 |  |  | A | 25℃ still air | 1 |
| Maximum voltage device can withstand without damage | Vmax |  |  | 16 | V | at rated current | 1 |
| Maximum fault current device can withstand without damage | Imax |  |  | 100 | A | at rated voltage | 1 |
| Maximum time to trip | Ttrip |  |  | 0.4 | S | at 8.0 A | 1 |
| Minimum resistance prior to trip | R min | 0.035 |  |  | Ω | prior to trip at 25℃ | 1 |
| Maximum resistance one hour post reflow | R1max |  |  | 0.14 | Ω | measured one hour post reflow at 25℃ | 1 |
| Maximum hold current (25℃ still air) | IH |  |  | 1.25 | A | 25℃ still air; will not trip | 1 |
| Rated working power | Pd |  | 0.8 |  | W | rated working power | 1 |
| Hold current vs ambient temperature |  |  | 1.8 |  | A | maximum ambient operating temperature -40℃ | 1 |
| Hold current vs ambient temperature |  |  | 1.63 |  | A | maximum ambient operating temperature -20℃ | 1 |
| Hold current vs ambient temperature |  |  | 1.43 |  | A | maximum ambient operating temperature 0℃ | 1 |
| Hold current vs ambient temperature |  |  | 1.25 |  | A | maximum ambient operating temperature 25℃ | 1 |
| Hold current vs ambient temperature |  |  | 1.08 |  | A | maximum ambient operating temperature 40℃ | 1 |
| Hold current vs ambient temperature |  |  | 0.99 |  | A | maximum ambient operating temperature 50℃ | 1 |
| Hold current vs ambient temperature |  |  | 0.91 |  | A | maximum ambient operating temperature 60℃ | 1 |
| Hold current vs ambient temperature |  |  | 0.81 |  | A | maximum ambient operating temperature 70℃ | 1 |
| Hold current vs ambient temperature |  |  | 0.68 |  | A | maximum ambient operating temperature 85℃ | 1 |
| Trip current vs ambient temperature |  |  | 3.6 |  | A | maximum ambient operating temperature -40℃ | 1 |
| Trip current vs ambient temperature |  |  | 3.26 |  | A | maximum ambient operating temperature -20℃ | 1 |
| Trip current vs ambient temperature |  |  | 2.86 |  | A | maximum ambient operating temperature 0℃ | 1 |
| Trip current vs ambient temperature |  |  | 2.5 |  | A | maximum ambient operating temperature 25℃ | 1 |
| Trip current vs ambient temperature |  |  | 2.16 |  | A | maximum ambient operating temperature 40℃ | 1 |
| Trip current vs ambient temperature |  |  | 1.98 |  | A | maximum ambient operating temperature 50℃ | 1 |
| Trip current vs ambient temperature |  |  | 1.82 |  | A | maximum ambient operating temperature 60℃ | 1 |
| Trip current vs ambient temperature |  |  | 1.62 |  | A | maximum ambient operating temperature 70℃ | 1 |
| Trip current vs ambient temperature |  |  | 1.36 |  | A | maximum ambient operating temperature 85℃ | 1 |

## CAD (KiCad official)

- Symbol: `TLC-MSMD125`
- Footprint: `Fuse:Fuse_1812_4532Metric`
- 3D model: 1812, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.9 mm nominal _1806_ height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `tlc-msmd125-etched.step` / `tlc-msmd125-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tlc-msmd125.step` / `tlc-msmd125.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/8589834938888450048) (1 pp, sha256 `c6af695ef3f1d51e`, retrieved 2026-10-16, 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/tlc-msmd125-datasheet.pdf)