component
BSMD1812-350-6V
Public Made by Adomby adom
BHFUSE 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
markdownBSMD1812-350-6V
BHFUSE · Resettable Fuses · 1812
BSMD1812-350-6V from BHFUSE, 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 the non-polarized resettable PTC fuse (Ihold 3.5 A, Itrip 7.0 A, Vmax 6 Vdc, Imax 100 A); pad 1.78±0.1 mm x 3.15±0.1 mm on a 3.45±0.1 mm gap. |
| 2 | 2 | passive | Terminal 2 of the non-polarized resettable PTC fuse (Ihold 3.5 A, Itrip 7.0 A, Vmax 6 Vdc, Imax 100 A); pad 1.78±0.1 mm x 3.15±0.1 mm on a 3.45±0.1 mm gap. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BHFUSE |
| 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 |
|---|---|---|---|---|---|---|---|
| Minimum resistance (initial, un-soldered state) | Rmin | 0.008 | Ω | Initial (un-soldered) state | 3 | ||
| Maximum resistance after trip or reflow | R1max | 0.035 | Ω | 25℃, one hour after tripping or reflow soldering of 260℃ for 20 sec | 3 | ||
| Maximum voltage | Vmax | 6 | Vdc | At rated current (Imax) | 3 | ||
| Maximum fault current | Imax | 100 | A | At rated voltage (Vmax) | 3 | ||
| Trip current | Itrip | 7 | A | 25℃ still air | 3 | ||
| Hold current | Ihold | 3.5 | A | 25℃ still air | 3 | ||
| Ambient operating temperature | -40 | 85 | °C | 5 | |||
| Maximum surface temperature in tripped state | 125 | °C | Device in tripped state | 5 | |||
| Resistance change, passive aging | -5 | 5 | % | +85°C, 1000 hours | 5 | ||
| Resistance change, humidity aging | -5 | 5 | % | +85°C, 85% R.H., 168 hours | 5 | ||
| Resistance change, thermal shock | -33 | 33 | % | +85°C to -40°C, 20 times | 5 | ||
| Peak temperature, Pb-free reflow | Tp | 260 | ℃ | Pb-free reflow profile | 6 | ||
| Soldering iron temperature | 350 | ℃ | Contact time not exceeding 3 seconds | 10 | |||
| Power dissipated in tripped state | Pd typ. | 2 | W | Tripped state, 25℃ still air | 3 | ||
| Time to trip test current | 10 | A | 3 | ||||
| Time to trip | 4 | Sec | 3 | ||||
| Hold current vs ambient temperature | Ihold | 4.84 | A | Ambient operating temperature -40℃ | 5 | ||
| Hold current vs ambient temperature | Ihold | 4.39 | A | Ambient operating temperature -20℃ | 5 | ||
| Hold current vs ambient temperature | Ihold | 4.04 | A | Ambient operating temperature 0℃ | 5 | ||
| Hold current vs ambient temperature | Ihold | 3.5 | A | Ambient operating temperature 25℃ | 5 | ||
| Hold current vs ambient temperature | Ihold | 2.98 | A | Ambient operating temperature 40℃ | 5 | ||
| Hold current vs ambient temperature | Ihold | 2.66 | A | Ambient operating temperature 50℃ | 5 | ||
| Hold current vs ambient temperature | Ihold | 2.35 | A | Ambient operating temperature 60℃ | 5 | ||
| Hold current vs ambient temperature | Ihold | 1.88 | A | Ambient operating temperature 70℃ | 5 | ||
| Hold current vs ambient temperature | Ihold | 1.55 | A | Ambient operating temperature 85℃ | 5 |
CAD (KiCad official)
- Symbol:
BSMD1812-350-6V - 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:
bsmd1812-350-6v-etched.step/bsmd1812-350-6v-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bsmd1812-350-6v.step/bsmd1812-350-6v.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BHFUSE datasheet (10 pp, sha256
a7f7e8936d26d547, 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).