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SMD1812-050C-30V
Public Made by Adomby adom
BNstar 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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README
markdownSMD1812-050C-30V
BNstar · Resettable Fuses · 1812
SMD1812-050C-30V from BNstar, 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 | One end terminal of the non-polarized resettable PTC fuse (30 V max, 0.50 A hold, 1.00 A trip at 25 °C, 40 A max fault current). |
| 2 | 2 | passive | Other end terminal of the non-polarized resettable PTC fuse, interchangeable with the first terminal (30 V max, 0.50 A hold, 1.00 A trip at 25 °C). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BNstar |
| 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 | IT | 1 | A | 25℃ still air, reflow 260℃ 20 s; minimum current at which device always trips | 2 | ||
| Maximum continuous voltage (rated voltage) | Vmax | 30 | V | Maximum continuous voltage at rated current | 1 | ||
| Maximum fault current | Imax | 40 | A | Maximum fault current at rated voltage | 1 | ||
| Maximum time to trip | Ttrip | 0.15 | s | At assigned current 8.00 A, 25℃ still air | 1 | ||
| Minimum resistance (initial, un-soldered) | Rmin | 0.15 | Ω | Initial (un-soldered) state | 1 | ||
| Maximum resistance at 25℃ one hour after reflow | R1max | 1.4 | Ω | 25℃, measured one hour after reflow soldering 260℃ for 20 s | 1 | ||
| Hold current | IH | 0.5 | A | 25℃ still air, reflow 260℃ 20 s; maximum current at which device will not trip | 1 | ||
| Typical power dissipation | Pdtyp | 0.8 | W | Typical power dissipated by device in tripped state, still air | 1 | ||
| Hold current at ambient temperature -40℃ | 0.69 | A | Thermal derating, maximum ambient operating temperature -40℃ | 2 | |||
| Hold current at ambient temperature -20℃ | 0.59 | A | Thermal derating, maximum ambient operating temperature -20℃ | 2 | |||
| Hold current at ambient temperature 0℃ | 0.55 | A | Thermal derating, maximum ambient operating temperature 0℃ | 2 | |||
| Hold current at ambient temperature 25℃ | 0.5 | A | Thermal derating, maximum ambient operating temperature 25℃ | 2 | |||
| Hold current at ambient temperature 40℃ | 0.45 | A | Thermal derating, maximum ambient operating temperature 40℃ | 2 | |||
| Hold current at ambient temperature 50℃ | 0.43 | A | Thermal derating, maximum ambient operating temperature 50℃ | 2 | |||
| Hold current at ambient temperature 60℃ | 0.35 | A | Thermal derating, maximum ambient operating temperature 60℃ | 2 | |||
| Hold current at ambient temperature 70℃ | 0.3 | A | Thermal derating, maximum ambient operating temperature 70℃ | 2 | |||
| Hold current at ambient temperature 85℃ | 0.23 | A | Thermal derating, maximum ambient operating temperature 85℃ | 2 |
CAD (KiCad official)
- Symbol:
SMD1812-050C-30V - 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:
smd1812-050c-30v-etched.step/smd1812-050c-30v-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smd1812-050c-30v.step/smd1812-050c-30v.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BNstar datasheet (3 pp, sha256
a93a0226bb3861ee, retrieved 2026-10-18, 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).