component
SMD1812-020-30
Public Made by Adomby adom
hongjiacheng Resettable Fuses, 1812. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, 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
markdownSMD1812-020-30
hongjiacheng · Resettable Fuses · 1812
SMD1812-020-30 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 | Terminal 1 of an unpolarised fuse; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised fuse; either orientation. |
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) | Ihold | 0.2 | A | 25℃ still air; maximum current the device passes without tripping | 2 | ||
| Trip current (Itrip) | Itrip | 0.4 | A | 25℃ still air; minimum current at which the device trips | 2 | ||
| Maximum voltage (Vmax) | Vmax | 30 | V | At rated current (Imax) | 2 | ||
| Maximum fault current (Imax) | Imax | 30 | A | At rated voltage (Vmax) | 2 | ||
| Power dissipated in tripped state (Pd typ.) | Pd | 0.8 | W | Typical, tripped state, 25℃ still air | 2 | ||
| Maximum time-to-trip | 8 | Sec | 2 | ||||
| Minimum initial resistance (Ri min) | Ri | 0.04 | Ω | Initial (un-soldered) state | 2 | ||
| Maximum resistance after trip/reflow (R1 max) | R1 | 0.35 | Ω | 25℃, measured one hour after tripping or after reflow soldering at 260℃ for 20 sec | 2 | ||
| Operating / storage temperature | -40 | 85 | ℃ | Operating and storage | 5 | ||
| Maximum device surface temperature in tripped state | 125 | ℃ | Tripped state | 5 | |||
| Preheat temperature minimum (TS(min)) | TS(min) | 150 | ℃ | Pb-free preheat | 1 | ||
| Preheat temperature maximum (TS(max)) | TS(max) | 200 | ℃ | Pb-free preheat | 1 | ||
| Preheat time (tS) | tS | 60 | 180 | secs | Time from TS(min) to TS(max) | 1 | |
| Average ramp-up rate | 3 | ℃/sec | From TL to peak | 1 | |||
| Ramp-down rate | 6 | ℃/sec | Reflow ramp-down | 1 | |||
| Time 25℃ to peak temperature | 8 | min | Reflow profile | 1 | |||
| Time within 5℃ of peak temperature (tP) | tP | 20 | 40 | secs | Within 5℃ of actual peak temperature | 1 | |
| Hold current derating at -40℃ (SMD1812-020 row) | Ihold | 0.29 | A | Ambient operating temperature -40℃; family row SMD1812-020 (suffix -30 not printed) | 4 | ||
| Hold current derating at -20℃ (SMD1812-020 row) | Ihold | 0.26 | A | Ambient operating temperature -20℃; family row SMD1812-020 (suffix -30 not printed) | 4 | ||
| Hold current derating at 0℃ (SMD1812-020 row) | Ihold | 0.23 | A | Ambient operating temperature 0℃; family row SMD1812-020 (suffix -30 not printed) | 4 | ||
| Hold current derating at 25℃ (SMD1812-020 row) | Ihold | 0.2 | A | Ambient operating temperature 25℃; family row SMD1812-020 (suffix -30 not printed) | 4 | ||
| Hold current derating at 40℃ (SMD1812-020 row) | Ihold | 0.17 | A | Ambient operating temperature 40℃; family row SMD1812-020 (suffix -30 not printed) | 4 | ||
| Hold current derating at 50℃ (SMD1812-020 row) | Ihold | 0.15 | A | Ambient operating temperature 50℃; family row SMD1812-020 (suffix -30 not printed) | 4 | ||
| Hold current derating at 60℃ (SMD1812-020 row) | Ihold | 0.14 | A | Ambient operating temperature 60℃; family row SMD1812-020 (suffix -30 not printed) | 4 | ||
| Hold current derating at 70℃ (SMD1812-020 row) | Ihold | 0.12 | A | Ambient operating temperature 70℃; family row SMD1812-020 (suffix -30 not printed) | 4 | ||
| Hold current derating at 85℃ (SMD1812-020 row) | Ihold | 0.1 | A | Ambient operating temperature 85℃; family row SMD1812-020 (suffix -30 not printed) | 4 |
CAD (KiCad official)
- Symbol:
SMD1812-020-30 - 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:
smd1812-020-30-etched.step/smd1812-020-30-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smd1812-020-30.step/smd1812-020-30.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, primarytwo-terminal convention(convention), consensusoff(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).