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JK-mSMD030SF
Public Made by Adomby adom
Shenzhen Jinkaisheng Elec Resettable Fuses, 1812. Pinout cross-checked by two models against the datasheet, 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-mSMD030SF
Shenzhen Jinkaisheng Elec · Resettable Fuses · 1812
JK-mSMD030SF from Shenzhen Jinkaisheng Elec, 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 pad of the non-polarized PTC device (tin-plated nickel-copper); rated Vmax 30 V dc, Imax 100 A, Ihold 0.30 A and Itrip 0.60 A at 25°C. |
| 2 | 2 | passive | Second terminal pad of the non-polarized PTC device (tin-plated nickel-copper); current flows through the device between the two pads, Ihold 0.30 A and Itrip 0.60 A at 25°C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen Jinkaisheng Elec |
| 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 | V max | 30 | V dc | at rated current (Imax) | 1 | ||
| Maximum fault current | I max | 100 | A | at rated voltage (Vmax) | 1 | ||
| Hold current | I hold | 0.3 | A | 25°C still air | 1 | ||
| Trip current | I trip | 0.6 | A | 25°C still air | 1 | ||
| Power dissipation in tripped state | Pd | 0.8 | W | tripped state, 25°C still air, at rated voltage | 1 | ||
| Minimum device resistance prior to tripping | Ri min | 0.25 | Ω | at 25°C | 1 | ||
| Maximum device resistance one hour post reflow | R1max | 3 | Ω | measured one hour post reflow | 1 | ||
| Time to trip | 0.1 | 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 | -40 | 85 | °C | ambient operating | 1 | ||
| Maximum surface temperature in tripped state | 125 | °C | device in tripped state, 25°C still air | 1 |
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 pad materials：Tin-plated Nickel-Copper | 4 |
CAD (KiCad official)
- Symbol:
JK-mSMD030SF - 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-msmd030sf-etched.step/jk-msmd030sf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);jk-msmd030sf.step/jk-msmd030sf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shenzhen Jinkaisheng Elec datasheet (6 pp, sha256
d09fdad3f5a7b662, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-5-5(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).