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SMD1812P300TFT

Public Made by Adom

by adom

PTTC Polytronics Tech 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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Made with kicad-footprint-generator 10.0 · KiCad file format 20260206
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docs Publish 0.1.0 · Ray 27d ago
viewers smd1812p300tft: viewers · Ray 27d ago
package.json smd1812p300tft: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 23d ago
page.json smd1812p300tft: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 23d ago
README.md Publish 0.1.0 · Ray 27d ago
smd1812p300tft-etched.glb smd1812p300tft: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 23d ago
smd1812p300tft-etched.step smd1812p300tft: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 23d ago
smd1812p300tft-hero.glb smd1812p300tft: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 23d ago
smd1812p300tft-hero.overlay.json smd1812p300tft: etched from the flattened plain STEP (service-occt 1.6.0, from the plain STEP) · Ray 23d ago
smd1812p300tft.glb plain STEP: one free product with face colours (generated model was nested; tscircuit read it white) · Ray 23d ago
smd1812p300tft.kicad_mod Publish 0.1.0 · Ray 27d ago
smd1812p300tft.kicad_sym smd1812p300tft: KiCad Device:Fuse symbol instead of a box (two-terminal passive) · Ray 11d ago
smd1812p300tft.lbr smd1812p300tft: KiCad Device:Fuse symbol instead of a box (two-terminal passive) · Ray 11d ago
smd1812p300tft.step plain STEP: one free product with face colours (generated model was nested; tscircuit read it white) · Ray 23d ago

SMD1812P300TFT

PTTC Polytronics Tech · Resettable Fuses · 1812

SMD1812P300TFT from PTTC Polytronics Tech, 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 PTTC Polytronics Tech
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 3 A 23 ºC still air; maximum current passed without tripping 3
Trip current (Itrip) Itrip 5 A 23 ºC still air; minimum current at which device trips 3
Maximum voltage (Vmax) Vmax 6 Vdc At rated current (Imax); maximum voltage device withstands without damage 3
Maximum fault current (Imax) Imax 100 A At rated voltage (Vmax); maximum fault current device withstands without damage 3
Maximum time to trip 4 s At 8.00 A fault current 3
Minimum resistance in initial (un-soldered) state (Rmin) Rmin 0.012 Ω Initial un-soldered state 3
Maximum resistance after trip or reflow (R1max) R1max 0.04 Ω 23 ºC, measured 1 h after tripping or 260 ºC reflow for 20 s; PWB with 0.030in*1.5oz copper traces 3
Power dissipated in tripped state (Pd) Pd 0.8 W Typical, tripped state at 23 ºC still air 3
Operating temperature -40 85 ºC Environmental specifications 11
Maximum device surface temperature in tripped state 125 ºC Tripped state 11
Storage temperature 0 35 ºC Storage condition 9
Storage humidity 70 %RH Storage condition; glyph printed as 'ʀ' read as ≤ 9
Passive aging resistance change -5 5 % +85 ºC, 1000 hours; typical resistance change, series-level 11
Humidity aging resistance change -5 5 % +85 ºC, 85 %RH, 1000 hours; typical resistance change, series-level 11
Thermal shock resistance change -30 % MIL-STD-202 Method 107G, +85 ºC/-40 ºC, 20 cycles; typical resistance change, series-level 11
Recommended hold current at -40 ºC Ihold 4.13 A Recommended hold current at ambient -40 ºC 6
Recommended hold current at -20 ºC Ihold 3.75 A Recommended hold current at ambient -20 ºC 6
Recommended hold current at 0 ºC Ihold 3.3 A Recommended hold current at ambient 0 ºC 6
Recommended hold current at 23 ºC Ihold 3 A Recommended hold current at ambient 23 ºC 6
Recommended hold current at 40 ºC Ihold 2.62 A Recommended hold current at ambient 40 ºC 6
Recommended hold current at 50 ºC Ihold 2.43 A Recommended hold current at ambient 50 ºC 6
Recommended hold current at 60 ºC Ihold 2.25 A Recommended hold current at ambient 60 ºC 6
Recommended hold current at 70 ºC Ihold 2 A Recommended hold current at ambient 70 ºC 6
Recommended hold current at 85 ºC Ihold 1.78 A Recommended hold current at ambient 85 ºC 6

CAD (KiCad official)

  • Symbol: SMD1812P300TFT
  • 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: smd1812p300tft-etched.step / smd1812p300tft-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); smd1812p300tft.step / smd1812p300tft.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: PTTC Polytronics Tech datasheet (15 pp, sha256 fd56e0378b967ec7, 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