component
mSMD350
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.
main
mSMD350
TECHFUSE · Resettable Fuses · 1812
mSMD350 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 |
|---|---|---|---|---|---|---|---|
| Hold current (Ihold), typical | Ihold | 3.5 | A | 25°C still air, maximum current device will not trip | 1 | ||
| Trip current (Itrip), minimum | Itrip | 6 | A | 25°C still air, minimum current at which device will always trip | 1 | ||
| Minimum resistance prior to tripping (Rimin) | Rimin | 0.008 | Ω | 25°C, prior to tripping | 1 | ||
| Maximum resistance one hour post reflow (R1max) | R1max | 0.03 | Ω | measured one hour post reflow | 1 | ||
| Maximum operating voltage (Vmax) | Vmax | 6 | Vdc | @25°C, without damage at rated current (Imax) | 1 | ||
| Maximum fault current (Imax) | Imax | 100 | A | @25°C, without damage at rated voltage (Vmax) | 1 | ||
| Power dissipation in tripped state (Pd) | Pd | 2 | W | tripped state, 25°C still air, at rated voltage | 1 | ||
| Time to trip (Time column) | 4 | s | 1 | ||||
| Resistance change, passive aging | -5 | 5 | % | +85°C, 1000 hrs; typical | 1 | ||
| Resistance change, humidity aging | -5 | 5 | % | +85°C, 85% R.H., 168 hours; typical | 1 | ||
| Resistance change, thermal shock | -33 | 33 | % | +85°C to -40°C, 20 times; typical | 1 | ||
| Ambient operating temperature range | -40 | 85 | °C | ambient operating conditions | 1 | ||
| Maximum surface temperature in tripped state | 125 | °C | device in tripped state | 1 | |||
| Hold current vs ambient temperature | Ihold | 4.84 | A | Tmao = -40°C | 1 | ||
| Hold current vs ambient temperature | Ihold | 4.39 | A | Tmao = -20°C | 1 | ||
| Hold current vs ambient temperature | Ihold | 4.04 | A | Tmao = 0°C | 1 | ||
| Hold current vs ambient temperature | Ihold | 3.5 | A | Tmao = 25°C | 1 | ||
| Hold current vs ambient temperature | Ihold | 2.98 | A | Tmao = 40°C | 1 | ||
| Hold current vs ambient temperature | Ihold | 2.66 | A | Tmao = 50°C | 1 | ||
| Hold current vs ambient temperature | Ihold | 2.35 | A | Tmao = 60°C | 1 | ||
| Hold current vs ambient temperature | Ihold | 1.88 | A | Tmao = 70°C | 1 | ||
| Hold current vs ambient temperature | Ihold | 1.55 | A | Tmao = 85°C | 1 | ||
| Storage temperature maximum | 40 | °C | storage, 70% R.H. max | 3 |
CAD (KiCad official)
- Symbol:
mSMD350 - 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:
msmd350-etched.step/msmd350-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);msmd350.step/msmd350.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TECHFUSE datasheet (3 pp, sha256
67b891cab3436150, retrieved 2026-10-15, 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).
# mSMD350
**TECHFUSE** · Resettable Fuses · 1812
mSMD350 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 |
|---|---|---|---|---|---|---|---|
| Hold current (Ihold), typical | Ihold | | 3.5 | | A | 25°C still air, maximum current device will not trip | 1 |
| Trip current (Itrip), minimum | Itrip | 6 | | | A | 25°C still air, minimum current at which device will always trip | 1 |
| Minimum resistance prior to tripping (Rimin) | Rimin | 0.008 | | | Ω | 25°C, prior to tripping | 1 |
| Maximum resistance one hour post reflow (R1max) | R1max | | | 0.03 | Ω | measured one hour post reflow | 1 |
| Maximum operating voltage (Vmax) | Vmax | | | 6 | Vdc | @25°C, without damage at rated current (Imax) | 1 |
| Maximum fault current (Imax) | Imax | | | 100 | A | @25°C, without damage at rated voltage (Vmax) | 1 |
| Power dissipation in tripped state (Pd) | Pd | | 2 | | W | tripped state, 25°C still air, at rated voltage | 1 |
| Time to trip (Time column) | | | 4 | | s | | 1 |
| Resistance change, passive aging | | -5 | | 5 | % | +85°C, 1000 hrs; typical | 1 |
| Resistance change, humidity aging | | -5 | | 5 | % | +85°C, 85% R.H., 168 hours; typical | 1 |
| Resistance change, thermal shock | | -33 | | 33 | % | +85°C to -40°C, 20 times; typical | 1 |
| Ambient operating temperature range | | -40 | | 85 | °C | ambient operating conditions | 1 |
| Maximum surface temperature in tripped state | | | | 125 | °C | device in tripped state | 1 |
| Hold current vs ambient temperature | Ihold | | 4.84 | | A | Tmao = -40°C | 1 |
| Hold current vs ambient temperature | Ihold | | 4.39 | | A | Tmao = -20°C | 1 |
| Hold current vs ambient temperature | Ihold | | 4.04 | | A | Tmao = 0°C | 1 |
| Hold current vs ambient temperature | Ihold | | 3.5 | | A | Tmao = 25°C | 1 |
| Hold current vs ambient temperature | Ihold | | 2.98 | | A | Tmao = 40°C | 1 |
| Hold current vs ambient temperature | Ihold | | 2.66 | | A | Tmao = 50°C | 1 |
| Hold current vs ambient temperature | Ihold | | 2.35 | | A | Tmao = 60°C | 1 |
| Hold current vs ambient temperature | Ihold | | 1.88 | | A | Tmao = 70°C | 1 |
| Hold current vs ambient temperature | Ihold | | 1.55 | | A | Tmao = 85°C | 1 |
| Storage temperature maximum | | | | 40 | °C | storage, 70% R.H. max | 3 |
## CAD (KiCad official)
- Symbol: `mSMD350`
- 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: `msmd350-etched.step` / `msmd350-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `msmd350.step` / `msmd350.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/8586175311499710464) (3 pp, sha256 `67b891cab3436150`, retrieved 2026-10-15, 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/msmd350-datasheet.pdf)