component

SMD1812P350TF

Public Made by Adom

by 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.

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SMD1812P350TF

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smd1812p350tf.step / smd1812p350tf.glb are 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, primary two-terminal convention (convention), consensus off (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).

Datasheet PDF