component
FSMD050-R
Public Made by Adomby adom
Fuzetec Tech 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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Contents
README
markdownFSMD050-R
Fuzetec Tech · Resettable Fuses · 1812
FSMD050-R from Fuzetec 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 | One terminal pad of the non-polarized PTC resettable fuse (pure tin), rated IH 0.50 A hold, IT 1.00 A trip, 16.0 VDC max, 100 A max fault current. |
| 2 | 2 | passive | Second terminal pad of the non-polarized PTC resettable fuse (pure tin), interchangeable with the other pad; recommended pad layout is given for all 1812 series. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Fuzetec 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 | IH | 0.5 | A | 23℃ still air | 1 | ||
| Trip current | IT | 1 | A | 23℃ still air | 1 | ||
| Rated voltage (maximum voltage device can withstand at rated current) | VMAX | 16 | VDC | At rated current IMAX | 1 | ||
| Maximum fault current (at rated voltage) | IMAX | 100 | A | At rated voltage VMAX | 1 | ||
| Maximum time to trip | 0.15 | Sec | Test current 8.0 A | 1 | |||
| Minimum device resistance prior to tripping (RMIN) | RMIN | 0.15 | Ohm | 23℃ prior to tripping | 1 | ||
| Maximum device resistance after tripping (R1MAX) | R1MAX | 1 | Ohm | 23℃, measured 1 hour after tripping or reflow soldering of 260℃ for 20 seconds | 1 | ||
| Operating temperature range | -40 | 85 | ℃ | Temperature Range, from Summary | 1 | ||
| Typical power dissipated in tripped state | Pd | 0.8 | W | Tripped state, 23℃ still air | 1 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | Terminal pad material: Pure Tin Soldering characteristics: Meets EIA specification RS 186-9E, ANSI/J-std-002 Category 3 | 4 |
CAD (KiCad official)
- Symbol:
FSMD050-R - 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:
fsmd050-r-etched.step/fsmd050-r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);fsmd050-r.step/fsmd050-r.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Fuzetec Tech datasheet (5 pp, sha256
7524936834e45601, 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).