component
SMD1812-125
Public Made by Adomby adom
Shenzhen Jinkaisheng Elec 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.
Made with kicad-footprint-generator 10.0 · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 21d ago |
| viewers | 21d ago |
| package.json | 21d ago |
| page.json | 21d ago |
| README.md | 21d ago |
| smd1812-125-etched.glb | 21d ago |
| smd1812-125-etched.step | 21d ago |
| smd1812-125-hero.glb | 21d ago |
| smd1812-125-hero.overlay.json | 21d ago |
| smd1812-125.glb | 21d ago |
| smd1812-125.kicad_mod | 21d ago |
| smd1812-125.kicad_sym | 11d ago |
| smd1812-125.lbr | 11d ago |
| smd1812-125.step | 21d ago |
SMD1812-125
Shenzhen Jinkaisheng Elec · Resettable Fuses · 1812
SMD1812-125 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 1 of an unpolarised fuse; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised fuse; either orientation. |
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 (Vmax) | Vmax | 8 | V dc | Maximum operating voltage the device can withstand without damage at rated current (Imax) | 1 | ||
| Maximum fault current (Imax) | Imax | 100 | A | Maximum fault current the device can withstand without damage at rated voltage (Vmax) | 1 | ||
| Hold current (Ihold) | Ihold | 1.25 | A | Maximum current device will not trip in 25°C still air | 1 | ||
| Trip current (Itrip) | Itrip | 2.5 | A | Minimum current at which the device will always trip in 25°C still air | 1 | ||
| Resistance prior to tripping (Ri) | Ri | 0.05 | 0.14 | Ω | 25°C, prior to tripping; R1max measured one hour post reflow | 1 | |
| Power dissipation in tripped state (Pd) | Pd | 0.8 | W | Tripped state in 25°C still air at rated voltage | 1 | ||
| Time to trip | 8 | Sec | Column 'Time To Trip (Sec)'; test current not printed | 1 | |||
| Passive aging resistance change | -5 | 5 | % | +85°C, 1000 hrs | 2 | ||
| Humidity aging resistance change | -5 | 5 | % | +85°C, 85% R.H., 168 hours | 2 | ||
| Thermal shock resistance change | -33 | 33 | % | +85°C to -40°C, 20 times | 2 | ||
| Ambient operating temperature | -40 | 85 | °C | Ambient operating conditions | 2 | ||
| Maximum surface temperature in tripped state | 125 | °C | Device in the tripped state | 2 | |||
| Recommended hold current at -40°C ambient | Ihold | 2 | A | Recommended hold current at ambient -40°C (derating table) | 3 | ||
| Recommended hold current at -20°C ambient | Ihold | 1.75 | A | Recommended hold current at ambient -20°C (derating table) | 3 | ||
| Recommended hold current at 0°C ambient | Ihold | 1.52 | A | Recommended hold current at ambient 0°C (derating table) | 3 | ||
| Recommended hold current at 25°C ambient | Ihold | 1.25 | A | Recommended hold current at ambient 25°C (derating table) | 3 | ||
| Recommended hold current at 40°C ambient | Ihold | 1 | A | Recommended hold current at ambient 40°C (derating table) | 3 | ||
| Recommended hold current at 50°C ambient | Ihold | 0.95 | A | Recommended hold current at ambient 50°C (derating table) | 3 | ||
| Recommended hold current at 60°C ambient | Ihold | 0.9 | A | Recommended hold current at ambient 60°C (derating table) | 3 | ||
| Recommended hold current at 70°C ambient | Ihold | 0.75 | A | Recommended hold current at ambient 70°C (derating table) | 3 | ||
| Recommended hold current at 85°C ambient | Ihold | 0.53 | A | Recommended hold current at ambient 85°C (derating table) | 3 | ||
| Storage temperature | 0 | 35 | °C | Storage condition; devices may not meet performance if exceeded | 4 | ||
| Storage humidity | 70 | %RH | Storage condition, ≤70% RH | 4 | |||
| Peak reflow temperature (Tp) | Tp | 260 | °C | Pb-free reflow profile, peak temperature | 4 | ||
| Average ramp-up rate | 3 | °C/second | Average ramp-up rate, Ts max to Tp | 4 | |||
| Ramp-down rate | 6 | °C/second | Ramp-down rate | 4 | |||
| Time 25°C to peak temperature | 8 | minutes | Time from 25°C to peak temperature | 4 | |||
| Maximum recommended paste thickness | 0.25 | mm | Recommended maximum paste thickness | 4 |
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 | 5 |
CAD (KiCad official)
- Symbol:
SMD1812-125 - 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:
smd1812-125-etched.step/smd1812-125-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smd1812-125.step/smd1812-125.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Shenzhen Jinkaisheng Elec datasheet (8 pp, sha256
721274444699c551, 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).