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SMD1812-260-8
Public Made by Adomby adom
hongjiacheng 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
markdownSMD1812-260-8
hongjiacheng · Resettable Fuses · 1812
SMD1812-260-8 from hongjiacheng, 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 | PTC terminal 1 (non-polarized, interchangeable with terminal 2); device is rated Ihold 2.60A, Itrip 5.20A, Vmax 8V, Imax 40A. |
| 2 | 2 | passive | PTC terminal 2 (non-polarized, interchangeable with terminal 1); device is rated Ihold 2.60A, Itrip 5.20A, Vmax 8V, Imax 40A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | hongjiacheng |
| 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 |
|---|---|---|---|---|---|---|---|
| Operating / storage temperature | -40 | 85 | ℃ | Operating / storage temperature | 5 | ||
| Maximum device surface temperature in tripped state | 125 | ℃ | Tripped state | 5 | |||
| Peak reflow temperature (TP) | 260 | ℃ | Printed +260(+0/-5)℃; do not exceed +260℃ | 1 | |||
| Hold current | Ihold | 2.6 | A | 25℃ still air; max current passed without tripping | 3 | ||
| Trip current | Itrip | 5.2 | A | 25℃ still air; min current at which device trips | 3 | ||
| Maximum voltage | Vmax | 8 | V | At rated current (Imax) | 3 | ||
| Maximum fault current | Imax | 40 | A | At rated voltage (Vmax) | 3 | ||
| Max. time-to-trip | 2.5 | s | At 8.0 A; Ta=25℃ | 3 | |||
| Minimum resistance in initial state | Ri | 0.01 | Ω | Initial un-soldered state | 3 | ||
| Maximum resistance after trip or reflow | R1 | 0.07 | Ω | 25℃, measured 1 h after tripping or reflow at 260℃ for 20 s | 3 | ||
| Typical power dissipated in tripped state | Pd | 1 | W | Tripped state, 25℃ still air | 3 | ||
| Hold current derating at ambient -40℃ (SMD1812-260 family) | Ihold | 3.9 | A | Ambient -40℃ | 4 | ||
| Hold current derating at ambient -20℃ (SMD1812-260 family) | Ihold | 3.42 | A | Ambient -20℃ | 4 | ||
| Hold current derating at ambient 0℃ (SMD1812-260 family) | Ihold | 2.96 | A | Ambient 0℃ | 4 | ||
| Hold current derating at ambient 25℃ (SMD1812-260 family) | Ihold | 2.6 | A | Ambient 25℃ | 4 | ||
| Hold current derating at ambient 40℃ (SMD1812-260 family) | Ihold | 2.22 | A | Ambient 40℃ | 4 | ||
| Hold current derating at ambient 50℃ (SMD1812-260 family) | Ihold | 2.07 | A | Ambient 50℃ | 4 | ||
| Hold current derating at ambient 60℃ (SMD1812-260 family) | Ihold | 1.94 | A | Ambient 60℃ | 4 | ||
| Hold current derating at ambient 70℃ (SMD1812-260 family) | Ihold | 1.35 | A | Ambient 70℃ | 4 | ||
| Hold current derating at ambient 85℃ (SMD1812-260 family) | Ihold | 1 | A | Ambient 85℃ | 4 |
CAD (KiCad official)
- Symbol:
SMD1812-260-8 - 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:
smd1812-260-8-etched.step/smd1812-260-8-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smd1812-260-8.step/smd1812-260-8.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: hongjiacheng datasheet (6 pp, sha256
8ab1f213bc6d6cd2, retrieved 2026-10-17, 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).