component
JK-mSMD450L-12
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-mSMD450L-12
Jinrui Electronic Materials Co · Resettable Fuses · 1812
JK-mSMD450L-12 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 continuous voltage (VMAX) at rated current | VMAX | 12 | V | Maximum continuous voltage device can withstand without damage at rated current | 3 | ||
| Maximum fault current (IMAX) at rated voltage | IMAX | 50 | A | Maximum fault current device can withstand without damage at rated voltage | 3 | ||
| Hold current (IH) | IH | 4.5 | A | Holding current 30 min at IH, 25℃ no trip; maximum current at which device will not interrupt in 25℃ still air | 4 | ||
| Trip current (IT) | IT | 9 | A | Minimum current at which device switches from low to high resistance in 25℃ still air | 3 | ||
| Maximum time to trip at specified current | 2 | s | Specified current 22.5 A, VMAX, 25℃ | 3 | |||
| IH derating at ambient -40℃ | IH | 6.54 | A | Maximum ambient operating temperature -40℃ | 4 | ||
| IH derating at ambient -20℃ | IH | 5.85 | A | Maximum ambient operating temperature -20℃ | 4 | ||
| IH derating at ambient 0℃ | IH | 5.26 | A | Maximum ambient operating temperature 0℃ | 4 | ||
| IH derating at ambient 25℃ | IH | 4.5 | A | Maximum ambient operating temperature 25℃ | 4 | ||
| IH derating at ambient 40℃ | IH | 3.86 | A | Maximum ambient operating temperature 40℃ | 4 | ||
| IH derating at ambient 50℃ | IH | 3.46 | A | Maximum ambient operating temperature 50℃ | 4 | ||
| IH derating at ambient 60℃ | IH | 3.1 | A | Maximum ambient operating temperature 60℃ | 4 | ||
| IH derating at ambient 70℃ | IH | 2.79 | A | Maximum ambient operating temperature 70℃ | 4 | ||
| IH derating at ambient 85℃ | IH | 2.25 | A | Maximum ambient operating temperature 85℃ | 4 | ||
| Operating temperature range | -40 | 85 | ℃ | Operating temperature (product features) | 1 | ||
| Maximum storage ambient temperature | 40 | ℃ | Storage; higher storage temperatures could deform packaging | 8 | |||
| Maximum storage relative humidity | 70 | % | Storage; recommended maximum relative humidity | 8 | |||
| Passive aging resistance change | -10 | 10 | % | 85℃, 1000 hours; typical resistance change | 5 | ||
| Humidity aging resistance change | -5 | 5 | % | 85℃/85%RH, 100 hours; typical resistance change | 5 | ||
| Thermal shock resistance change | -30 | % | MIL-STD-202 Method 107G, +85℃/-40℃, 20 times; typical resistance change | 5 |
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 Materials Tin-Plated Nickle-copper | 4 |
CAD (KiCad official)
- Symbol:
JK-mSMD450L-12 - 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-msmd450l-12-etched.step/jk-msmd450l-12-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);jk-msmd450l-12.step/jk-msmd450l-12.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
e67a941ead1377dd, retrieved 2026-10-18, 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-mSMD450L-12
**Jinrui Electronic Materials Co** · Resettable Fuses · 1812
JK-mSMD450L-12 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 continuous voltage (VMAX) at rated current | VMAX | | | 12 | V | Maximum continuous voltage device can withstand without damage at rated current | 3 |
| Maximum fault current (IMAX) at rated voltage | IMAX | | | 50 | A | Maximum fault current device can withstand without damage at rated voltage | 3 |
| Hold current (IH) | IH | | | 4.5 | A | Holding current 30 min at IH, 25℃ no trip; maximum current at which device will not interrupt in 25℃ still air | 4 |
| Trip current (IT) | IT | 9 | | | A | Minimum current at which device switches from low to high resistance in 25℃ still air | 3 |
| Maximum time to trip at specified current | | | | 2 | s | Specified current 22.5 A, VMAX, 25℃ | 3 |
| IH derating at ambient -40℃ | IH | | 6.54 | | A | Maximum ambient operating temperature -40℃ | 4 |
| IH derating at ambient -20℃ | IH | | 5.85 | | A | Maximum ambient operating temperature -20℃ | 4 |
| IH derating at ambient 0℃ | IH | | 5.26 | | A | Maximum ambient operating temperature 0℃ | 4 |
| IH derating at ambient 25℃ | IH | | 4.5 | | A | Maximum ambient operating temperature 25℃ | 4 |
| IH derating at ambient 40℃ | IH | | 3.86 | | A | Maximum ambient operating temperature 40℃ | 4 |
| IH derating at ambient 50℃ | IH | | 3.46 | | A | Maximum ambient operating temperature 50℃ | 4 |
| IH derating at ambient 60℃ | IH | | 3.1 | | A | Maximum ambient operating temperature 60℃ | 4 |
| IH derating at ambient 70℃ | IH | | 2.79 | | A | Maximum ambient operating temperature 70℃ | 4 |
| IH derating at ambient 85℃ | IH | | 2.25 | | A | Maximum ambient operating temperature 85℃ | 4 |
| Operating temperature range | | -40 | | 85 | ℃ | Operating temperature (product features) | 1 |
| Maximum storage ambient temperature | | | | 40 | ℃ | Storage; higher storage temperatures could deform packaging | 8 |
| Maximum storage relative humidity | | | | 70 | % | Storage; recommended maximum relative humidity | 8 |
| Passive aging resistance change | | -10 | | 10 | % | 85℃, 1000 hours; typical resistance change | 5 |
| Humidity aging resistance change | | -5 | | 5 | % | 85℃/85%RH, 100 hours; typical resistance change | 5 |
| Thermal shock resistance change | | | -30 | | % | MIL-STD-202 Method 107G, +85℃/-40℃, 20 times; typical resistance change | 5 |
## 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 Materials Tin-Plated Nickle-copper | 4 |
## CAD (KiCad official)
- Symbol: `JK-mSMD450L-12`
- 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-msmd450l-12-etched.step` / `jk-msmd450l-12-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `jk-msmd450l-12.step` / `jk-msmd450l-12.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/8590456104988667904) (8 pp, sha256 `e67a941ead1377dd`, retrieved 2026-10-18, 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-msmd450l-12-datasheet.pdf)