component
JK-mSMD300
Public Made by Adomby adom
Jinrui Electronic Materials Co 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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JK-mSMD300
Jinrui Electronic Materials Co · Resettable Fuses · 1812
JK-mSMD300 from Jinrui Electronic Materials Co, 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 | Jinrui Electronic Materials Co |
| 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 voltage rating | Vmax | 8 | Vdc | 4 | |||
| Maximum fault current | Imax | 100 | A | 4 | |||
| Hold current | Ihold | 3 | A | @25°C | 4 | ||
| Trip current | Itrip | 5 | A | @25°C | 4 | ||
| Time to trip | 4 | s | at 8.0 A | 4 | |||
| Minimum resistance prior to tripping | Rimin | 0.012 | Ω | R25, 25°C | 4 | ||
| Maximum resistance one hour post reflow | R1max | 0.04 | Ω | 1 hour post reflow | 4 | ||
| Operating temperature | -40 | 85 | °C | 1 | |||
| Passive aging resistance change | -10 | 10 | % | 85°C, 1000 hours | 5 | ||
| Humidity aging resistance change | -5 | 5 | % | 85°C/85%RH, 1000 hours | 5 | ||
| Thermal shock resistance change | -30 | % | MIL-STD-202 Method 107G, +85°C/-40°C, 20 times | 5 |
CAD (KiCad official)
- Symbol:
JK-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:
jk-msmd300-etched.step/jk-msmd300-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);jk-msmd300.step/jk-msmd300.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Jinrui Electronic Materials Co datasheet (8 pp, sha256
f738482242d5dcb4, 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).
# JK-mSMD300
**Jinrui Electronic Materials Co** · Resettable Fuses · 1812
JK-mSMD300 from Jinrui Electronic Materials Co, 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 | Jinrui Electronic Materials Co |
| 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 voltage rating | Vmax | | | 8 | Vdc | | 4 |
| Maximum fault current | Imax | | | 100 | A | | 4 |
| Hold current | Ihold | | | 3 | A | @25°C | 4 |
| Trip current | Itrip | 5 | | | A | @25°C | 4 |
| Time to trip | | | | 4 | s | at 8.0 A | 4 |
| Minimum resistance prior to tripping | Rimin | 0.012 | | | Ω | R25, 25°C | 4 |
| Maximum resistance one hour post reflow | R1max | | | 0.04 | Ω | 1 hour post reflow | 4 |
| Operating temperature | | -40 | | 85 | °C | | 1 |
| Passive aging resistance change | | -10 | | 10 | % | 85°C, 1000 hours | 5 |
| Humidity aging resistance change | | -5 | | 5 | % | 85°C/85%RH, 1000 hours | 5 |
| Thermal shock resistance change | | | -30 | | % | MIL-STD-202 Method 107G, +85°C/-40°C, 20 times | 5 |
## CAD (KiCad official)
- Symbol: `JK-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: `jk-msmd300-etched.step` / `jk-msmd300-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `jk-msmd300.step` / `jk-msmd300.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Jinrui Electronic Materials Co datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588919268368912384) (8 pp, sha256 `f738482242d5dcb4`, 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/jk-msmd300-datasheet.pdf)