component
SMD1812B300TFT
Public Made by Adomby adom
Brightking 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
markdownSMD1812B300TFT
Brightking · Resettable Fuses · 1812
SMD1812B300TFT from Brightking, 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 | Brightking |
| 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 |
|---|---|---|---|---|---|---|---|
| Trip current (minimum) | Itrip | 5 | A | 23℃ still air | 2 | ||
| Minimum resistance (un-soldered initial state) | Rmin | 0.012 | Ω | Initial un-soldered state | 2 | ||
| Hold current (maximum) | Ihold | 3 | A | 23℃ still air | 2 | ||
| Maximum voltage | Vmax | 6 | Vdc | At rated current (Imax) | 2 | ||
| Maximum fault current | Imax | 100 | A | At rated voltage (Vmax) | 2 | ||
| Maximum time to trip | 4 | s | At 8.00 A | 2 | |||
| Maximum resistance after trip or reflow | R1max | 0.04 | Ω | 23℃, measured one hour after tripping or reflow soldering at 260℃ for 20 sec | 2 | ||
| Passive aging resistance change (typical) | -50 | 50 | % | +85℃, 1000 hours; typical resistance change | 9 | ||
| Humidity aging resistance change (typical) | -50 | 50 | % | +85℃, 85%R.H., 1000 hours; typical resistance change | 9 | ||
| Thermal shock resistance change (typical) | -50 | % | MIL-STD-202 Method 107G, -40℃ to +85℃, 20 times; typical resistance change | 9 | |||
| Operating / storage temperature | -40 | 85 | ℃ | Operating / storage temperature | 9 | ||
| Maximum device surface temperature in tripped state | 125 | ℃ | Tripped state | 9 | |||
| Power dissipated in tripped state (typical) | Pd typ. | 0.8 | W | Tripped state at 23℃ still air | 2 | ||
| Recommended hold current at ambient -40℃ | 4.13 | A | Ambient -40℃ | 5 | |||
| Recommended hold current at ambient -20℃ | 3.75 | A | Ambient -20℃ | 5 | |||
| Recommended hold current at ambient 0℃ | 3.3 | A | Ambient 0℃ | 5 | |||
| Recommended hold current at ambient 23℃ | 3 | A | Ambient 23℃ | 5 | |||
| Recommended hold current at ambient 40℃ | 2.62 | A | Ambient 40℃ | 5 | |||
| Recommended hold current at ambient 50℃ | 2.43 | A | Ambient 50℃ | 5 | |||
| Recommended hold current at ambient 60℃ | 2.25 | A | Ambient 60℃ | 5 | |||
| Recommended hold current at ambient 70℃ | 2 | A | Ambient 70℃ | 5 | |||
| Recommended hold current at ambient 85℃ | 1.78 | A | Ambient 85℃ | 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 Material Solder-Plated Copper (Solder Material: Matte Tin (Sn)) | 10 |
CAD (KiCad official)
- Symbol:
SMD1812B300TFT - 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:
smd1812b300tft-etched.step/smd1812b300tft-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smd1812b300tft.step/smd1812b300tft.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Brightking datasheet (11 pp, sha256
341444dcfc3f77f4, 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).