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SMD1812-750-12V
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
markdownSMD1812-750-12V
BNstar · Resettable Fuses · 1812
SMD1812-750-12V 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 resettable PTC fuse, non-polarized and interchangeable with the other terminal; rated 7.5 A hold, 15.0 A trip, 12.0 V max, 50 A max fault current. |
| 2 | 2 | passive | Other end terminal of the resettable PTC fuse, non-polarized and interchangeable with the other terminal; rated 7.5 A hold, 15.0 A trip, 12.0 V max, 50 A max fault current. |
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 |
|---|---|---|---|---|---|---|---|
| Maximum continuous voltage (rated voltage) | Vmax | 12 | V | Maximum continuous voltage device can withstand without damage at rated current | 1 | ||
| Hold current | IH | 7.5 | A | 25℃ still air; maximum current at which device will not trip | 1 | ||
| Trip current | IT | 15 | A | 25℃ still air; minimum current at which device will always trip | 1 | ||
| Maximum fault current at rated voltage | Imax | 50 | A | At rated voltage; maximum fault current device can withstand without damage | 1 | ||
| Minimum resistance (initial, un-soldered state) | Rmin | 0.0005 | Ω | Initial (un-soldered) state | 1 | ||
| Maximum resistance at 25℃ after reflow | R1max | 0.007 | Ω | 25℃, measured one hour after reflow soldering of 260℃ for 20 sec | 1 | ||
| Typical power dissipation | Pdtyp | 2 | W | Typical power dissipation when in tripped state, air environment | 1 | ||
| Hold current at ambient temperature -40 ℃ (derating) | 12 | A | Ambient temperature -40 ℃ (thermal derating table) | 2 | |||
| Hold current at ambient temperature -20 ℃ (derating) | 10.4 | A | Ambient temperature -20 ℃ (thermal derating table) | 2 | |||
| Hold current at ambient temperature 0 ℃ (derating) | 8.8 | A | Ambient temperature 0 ℃ (thermal derating table) | 2 | |||
| Hold current at ambient temperature 25 ℃ (derating) | 7.5 | A | Ambient temperature 25 ℃ (thermal derating table) | 2 | |||
| Hold current at ambient temperature 40 ℃ (derating) | 6.6 | A | Ambient temperature 40 ℃ (thermal derating table) | 2 | |||
| Hold current at ambient temperature 50 ℃ (derating) | 6.1 | A | Ambient temperature 50 ℃ (thermal derating table) | 2 | |||
| Hold current at ambient temperature 60 ℃ (derating) | 5.6 | A | Ambient temperature 60 ℃ (thermal derating table) | 2 | |||
| Hold current at ambient temperature 70 ℃ (derating) | 5.1 | A | Ambient temperature 70 ℃ (thermal derating table) | 2 | |||
| Recommended storage temperature | 40 | ℃ | Recommended storage conditions, maximum | 2 | |||
| Recommended storage relative humidity | 70 | % R.H. | Recommended storage conditions, maximum | 2 |
CAD (KiCad official)
- Symbol:
SMD1812-750-12V - 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:
smd1812-750-12v-etched.step/smd1812-750-12v-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smd1812-750-12v.step/smd1812-750-12v.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BNstar datasheet (3 pp, sha256
820eb525b6f5898e, 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).