component
mSMD300
Public Made by Adomby adom
TECHFUSE Resettable Fuses, 1812. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
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mSMD300
TECHFUSE · Resettable Fuses · 1812
mSMD300 from TECHFUSE, 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 | TECHFUSE |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum operating voltage (Vmax) | Vmax | 8 | V | at rated current (Imax) | 1 | ||
| Maximum fault current (Imax) | Imax | 100 | A | at rated voltage (Vmax) | 1 | ||
| Trip current (Itrip) | Itrip | 5 | A | 25°C still air | 1 | ||
| Minimum device resistance prior to tripping (Rimin) | Rimin | 0.012 | Ω | 25°C, prior to tripping | 1 | ||
| Maximum device resistance one hour post reflow (R1max) | R1max | 0.04 | Ω | measured one hour post reflow | 1 | ||
| Ambient operating temperature | -40 | 85 | °C | ambient operating conditions | 1 | ||
| Maximum surface temperature in tripped state | 125 | °C | device in the tripped state | 1 | |||
| Storage temperature | 40 | °C | storage conditions | 3 | |||
| Storage relative humidity | 70 | % R.H. | storage conditions | 3 | |||
| Hold current (Ihold) | Ihold | 3 | A | 25°C still air | 1 | ||
| Power dissipation in tripped state (Pd) | Pd | 0.8 | W | 25°C still air, tripped state, at rated voltage | 1 | ||
| Time to trip | 4 | s | 1 |
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:
mSMD300 - 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:
msmd300-etched.step/msmd300-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);msmd300.step/msmd300.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TECHFUSE datasheet (3 pp, sha256
67b891cab3436150, retrieved 2026-10-16, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins, primarytwo-terminal convention(convention), consensusoff(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).
# mSMD300
**TECHFUSE** · Resettable Fuses · 1812
mSMD300 from TECHFUSE, 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 | TECHFUSE |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum operating voltage (Vmax) | Vmax | | | 8 | V | at rated current (Imax) | 1 |
| Maximum fault current (Imax) | Imax | | | 100 | A | at rated voltage (Vmax) | 1 |
| Trip current (Itrip) | Itrip | 5 | | | A | 25°C still air | 1 |
| Minimum device resistance prior to tripping (Rimin) | Rimin | 0.012 | | | Ω | 25°C, prior to tripping | 1 |
| Maximum device resistance one hour post reflow (R1max) | R1max | | | 0.04 | Ω | measured one hour post reflow | 1 |
| Ambient operating temperature | | -40 | | 85 | °C | ambient operating conditions | 1 |
| Maximum surface temperature in tripped state | | | | 125 | °C | device in the tripped state | 1 |
| Storage temperature | | | | 40 | °C | storage conditions | 3 |
| Storage relative humidity | | | | 70 | % R.H. | storage conditions | 3 |
| Hold current (Ihold) | Ihold | | 3 | | A | 25°C still air | 1 |
| Power dissipation in tripped state (Pd) | Pd | | 0.8 | | W | 25°C still air, tripped state, at rated voltage | 1 |
| Time to trip | | | 4 | | s | | 1 |
## 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: `mSMD300`
- 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: `msmd300-etched.step` / `msmd300-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `msmd300.step` / `msmd300.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/8586176078734245888) (3 pp, sha256 `67b891cab3436150`, 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/msmd300-datasheet.pdf)