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SMD1812P350TF
Public Made by Adomby adom
RUILON Shenzhen Ruilongyuan Elec 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
markdownSMD1812P350TF
RUILON Shenzhen Ruilongyuan Elec · Resettable Fuses · 1812
SMD1812P350TF from RUILON Shenzhen Ruilongyuan Elec, 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 | RUILON Shenzhen Ruilongyuan Elec |
| 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 |
|---|---|---|---|---|---|---|---|
| Vmax, maximum operating voltage | Vmax | 6 | 6 | VDC | Max operating voltage at rated current (Imax), SMD1812P350TF (no /16 suffix) | 2 | |
| Imax, maximum fault current | Imax | 35 | 35 | A | Max fault current withstood at rated voltage (Vmax) | 2 | |
| Ihold, hold current | Ihold | 3.5 | A | 25 °C still air, does not trip | 2 | ||
| Itrip, trip current | Itrip | 6 | 6 | A | 25 °C still air, minimum current at which device always trips | 2 | |
| Max time to trip | 4 | s | Test current printed as 10 A in table column; see review_required | 2 | |||
| Pd, power dissipation tripped | Pd | 2 | W | Tripped state, 25 °C still air, at rated voltage | 2 | ||
| Rimin, minimum resistance before tripping | Ri min | 0.008 | Ω | 25 °C prior to tripping | 2 | ||
| R1max, maximum resistance one hour post reflow | R1max | 0.03 | Ω | Measured one hour post reflow | 2 | ||
| Passive aging resistance change | ΔR/R | -5 | 5 | % | +85 °C, 1000 hrs; printed as typical ±5% | 1 | |
| Humidity aging resistance change | ΔR/R | -5 | 5 | % | +85 °C, 85% R.H., 168 hours; printed as typical ±5% | 1 | |
| Thermal shock resistance change | ΔR/R | -33 | 33 | % | +85 °C to -40 °C, 20 times; printed as typical ±33% | 1 | |
| Ambient operating temperature | Ta | -40 | 85 | °C | Ambient operating conditions | 1 | |
| Maximum surface temperature in tripped state | 125 | °C | Device in tripped state | 1 | |||
| Reflow peak temperature | TP | 260 | °C | Pb-free reflow, printed 260 +0/-5 °C; do not exceed 260 °C | 4 | ||
| Hold current derating | Ih | 4.84 | A | Ambient -40 °C | 4 | ||
| Hold current derating | Ih | 4.39 | A | Ambient -20 °C | 4 | ||
| Hold current derating | Ih | 4.04 | A | Ambient 0 °C | 4 | ||
| Hold current derating | Ih | 3.5 | A | Ambient 25 °C | 4 | ||
| Hold current derating | Ih | 2.98 | A | Ambient 40 °C | 4 | ||
| Hold current derating | Ih | 2.66 | A | Ambient 50 °C | 4 | ||
| Hold current derating | Ih | 2.35 | A | Ambient 60 °C | 4 | ||
| Hold current derating | Ih | 1.88 | A | Ambient 70 °C | 4 | ||
| Hold current derating | Ih | 1.55 | A | Ambient 85 °C | 4 |
CAD (KiCad official)
- Symbol:
SMD1812P350TF - 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:
smd1812p350tf-etched.step/smd1812p350tf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);smd1812p350tf.step/smd1812p350tf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: RUILON Shenzhen Ruilongyuan Elec datasheet (8 pp, sha256
17f9c523d0f567cd, retrieved 2026-10-13, 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).