component
JK-MSMD125
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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README
markdownJK-MSMD125
Jinrui Electronic Materials Co · Resettable Fuses · 1812
JK-MSMD125 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 operating voltage (Umax) | Umax | 16 | Vdc | Maximum operating voltage at rated current (Imax) | 4 | ||
| Maximum fault current (Imax) | Imax | 100 | A | At rated voltage (Vmax) | 4 | ||
| Hold current (Ihold) | Ihold | 1.25 | A | 25°C, still air; maximum current device will not trip | 4 | ||
| Trip current (Itrip) | Itrip | 2.5 | A | 25°C, still air; minimum current at which device always trips | 4 | ||
| Maximum time to trip | 0.4 | Sec | At 8.0 A trip current, 25°C, still air | 4 | |||
| Minimum resistance prior to tripping (Rimin) | Rimin | 0.05 | Ω | In still air @ 25°C | 4 | ||
| Maximum resistance one hour post reflow (R1max) | R1max | 0.2 | Ω | Measured one hour post reflow | 4 | ||
| Resistance change, passive aging | -10 | 10 | % | 85℃, 1000 hours | 5 | ||
| Resistance change, humidity aging | -5 | 5 | % | 85℃/85%RH, 1000 hours | 5 | ||
| Operating temperature range | -40 | 85 | °C | Product feature statement for the JK-mSMD series | 1 | ||
| Resistance change, thermal shock | -30 | % | MIL-STD-202 Method 107G, +85℃/-40℃, 20 times; typical change | 5 | |||
| Thermal derating hold current IH at maximum ambient -40°C | IH | 2 | A | Maximum ambient operating temperature -40°C | 3 | ||
| Thermal derating hold current IH at maximum ambient -20°C | IH | 1.75 | A | Maximum ambient operating temperature -20°C | 3 | ||
| Thermal derating hold current IH at maximum ambient 0°C | IH | 1.52 | A | Maximum ambient operating temperature 0°C | 3 | ||
| Thermal derating hold current IH at maximum ambient 25°C | IH | 1.25 | A | Maximum ambient operating temperature 25°C | 3 | ||
| Thermal derating hold current IH at maximum ambient 40°C | IH | 1 | A | Maximum ambient operating temperature 40°C | 3 | ||
| Thermal derating hold current IH at maximum ambient 50°C | IH | 0.95 | A | Maximum ambient operating temperature 50°C | 3 | ||
| Thermal derating hold current IH at maximum ambient 60°C | IH | 0.9 | A | Maximum ambient operating temperature 60°C | 3 | ||
| Thermal derating hold current IH at maximum ambient 70°C | IH | 0.75 | A | Maximum ambient operating temperature 70°C | 3 | ||
| Thermal derating hold current IH at maximum ambient 85°C | IH | 0.53 | A | Maximum ambient operating temperature 85°C | 3 |
CAD (KiCad official)
- Symbol:
JK-MSMD125 - 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-msmd125-etched.step/jk-msmd125-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);jk-msmd125.step/jk-msmd125.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
8d950f09d4bc30e4, 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).