component
JK-mSMD300L-6
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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownJK-mSMD300L-6
Jinrui Electronic Materials Co · Resettable Fuses · 1812
JK-mSMD300L-6 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 |
|---|---|---|---|---|---|---|---|
| Initial resistance minimum (RiMIN) | RiMIN | 0.003 | Ω | In still air at 25℃ | 2 | ||
| Maximum device resistance (measured one hour post reflow) | R1MAX | 0.022 | Ω | 2 | |||
| Maximum continuous voltage device can withstand without damage (rated voltage) | VMAX | 6 | V | 2 | |||
| Maximum fault current device can withstand without damage (at rated voltage) | IMAX | 50 | A | 2 | |||
| Hold current (maximum current at which device will not interrupt, 25℃ still air) | IH | 3 | A | 30min, at IH, 25℃ (holding current test: no trip) | 4 | ||
| Trip current (minimum current at which device switches to high resistance, 25℃ still air) | IT | 6 | A | 2 | |||
| Maximum time to trip at assigned current (15.0 A column) | 2 | sec | Specified current 15.0 A, VMAX, 25℃ | 2 | |||
| Typical power dissipation in 25℃ still air | PD | 1.5 | W | 2 | |||
| Passive aging resistance change (typical) | -10 | 10 | % | 85℃, 1000 hours | 5 | ||
| Humidity aging resistance change (typical) | -5 | 5 | % | 85℃/85%RH, 100 hours | 5 | ||
| Thermal shock resistance change (typical) | -30 | % | MIL-STD-202 Method 107G, +85℃/-40℃, 20 times | 5 | |||
| Operating temperature range | -40 | 85 | ℃ | 1 | |||
| Average ramp up rate (TsMAX to Tp), Pb-free reflow | 3 | ℃/second | Pb-free assembly reflow profile | 6 | |||
| Peak/classification temperature (TP), Pb-free reflow | TP | 260 | ℃ | Pb-free assembly reflow profile | 6 | ||
| Time within 5℃ of actual peak temperature (TP), Pb-free reflow | 30 | seconds | Pb-free assembly reflow profile | 6 | |||
| Time 25℃ to peak temperature, Pb-free reflow | 8 | minutes | Pb-free assembly reflow profile | 6 | |||
| Ramp down rate, Pb-free reflow | 3 | ℃/second | Pb-free assembly reflow profile | 6 |
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-mSMD300L-6 - 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-msmd300l-6-etched.step/jk-msmd300l-6-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);jk-msmd300l-6.step/jk-msmd300l-6.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 2026-10-19, 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).