component
SMD1812-035-30
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
markdownSMD1812-035-30
hongjiacheng · Resettable Fuses · 1812
SMD1812-035-30 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 | Non-polarized PPTC terminal; device holds 0.35A (Ihold), trips at 0.75A (Itrip), and is rated 30V Vmax at 40A Imax. |
| 2 | 2 | passive | Non-polarized PPTC terminal; device holds 0.35A (Ihold), trips at 0.75A (Itrip), and is rated 30V Vmax at 40A Imax. |
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 |
|---|---|---|---|---|---|---|---|
| Max. time-to-trip | 8 | Sec | 2 | ||||
| Minimum resistance in initial (un-soldered) state | Ri | 0.15 | Ω | initial (un-soldered) state | 2 | ||
| Maximum voltage device can withstand without damage at rated current (Imax) | Vmax | 30 | V | at rated current (Imax) | 2 | ||
| Maximum fault current device can withstand without damage at rated voltage (Vmax) | Imax | 40 | A | at rated voltage (Vmax) | 2 | ||
| Trip current (minimum current at which the device will trip) | Itrip | 0.75 | A | 25℃ still air | 2 | ||
| Hold current (maximum current device will pass without tripping) | Ihold | 0.35 | A | 25℃ still air | 2 | ||
| Typical power dissipated when in tripped state | Pd | 0.8 | W | tripped state, 25℃ still air | 2 | ||
| Operating / Storage temperature | -40 | 85 | ℃ | 5 | |||
| Maximum device surface temperature in tripped state | 125 | ℃ | tripped state | 5 |
CAD (KiCad official)
- Symbol:
SMD1812-035-30 - 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:
smd1812-035-30-etched.step/smd1812-035-30-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smd1812-035-30.step/smd1812-035-30.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: hongjiacheng datasheet (6 pp, sha256
8ab1f213bc6d6cd2, retrieved 2026-10-19, 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).