component
SMD1812-200-12
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
markdownSMD1812-200-12
hongjiacheng · Resettable Fuses · 1812
SMD1812-200-12 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 | First terminal pad of the non-polarized PPTC device (1.7±0.1 mm pad, 3.5±0.1 mm tall), rated Ihold 2.0 A, Itrip 4.0 A, Vmax 12 V, Imax 40 A. |
| 2 | 2 | passive | Second terminal pad of the non-polarized PPTC device, 3.0±0.1 mm pad gap, with resistance of 0.02 Ω min initial and 0.10 Ω max after trip or reflow. |
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 |
|---|---|---|---|---|---|---|---|
| Hold current | Ihold | 2 | A | 25℃ still air; maximum current device passes without tripping | 3 | ||
| Trip current | Itrip | 4 | A | 25℃ still air; minimum current at which device trips | 3 | ||
| Maximum voltage | Vmax | 12 | V | Maximum voltage device can withstand without damage at rated current (Imax) | 3 | ||
| Maximum fault current | Imax | 40 | A | Maximum fault current device can withstand without damage at rated voltage (Vmax) | 3 | ||
| Max. time-to-trip | 2 | s | Test current 8.0 A (printed in same row) | 3 | |||
| Minimum resistance in initial (un-soldered) state | Ri | 0.02 | Ω | Initial (un-soldered) state | 3 | ||
| Maximum resistance at 25℃ after trip or reflow | R1 | 0.1 | Ω | 25℃, measured one hour after tripping or reflow soldering of 260℃ for 20 sec | 3 | ||
| Typical power dissipated in tripped state | Pd | 1 | W | Tripped state at 25℃ still air | 3 | ||
| Operating / storage temperature | -40 | 85 | ℃ | Operating / storage | 5 | ||
| Maximum device surface temperature in tripped state | 125 | ℃ | Tripped state | 5 | |||
| Peak reflow temperature (TP) | TP | 260 | ℃ | Pb-free reflow profile; do not exceed +260℃; printed as +260(+0/-5)℃ | 1 |
CAD (KiCad official)
- Symbol:
SMD1812-200-12 - 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:
smd1812-200-12-etched.step/smd1812-200-12-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smd1812-200-12.step/smd1812-200-12.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: hongjiacheng datasheet (6 pp, sha256
8ab1f213bc6d6cd2, retrieved 2026-10-18, 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).