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SRF1812P050
Public Made by Adomby adom
prosemi 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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README
markdownSRF1812P050
prosemi · Resettable Fuses · 1812
SRF1812P050 from prosemi, 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 | First terminal of the non-polarized PTC resettable fuse (one end-cap pad, recommended pad 1.78±0.1 mm x 3.15±0.1 mm), rated hold current 0.50 A, trip current 1.00 A, Vmax 60 V. |
| 2 | 2 | passive | Second terminal of the non-polarized PTC resettable fuse (other end-cap pad, 3.45±0.1 mm pad gap), rated hold current 0.50 A, trip current 1.00 A, Vmax 60 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | prosemi |
| 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 (max, will not trip at 25°C still air) | IH | 0.5 | A | 25°C still air, after one reflow; per definition IH = maximum current at which the device will not trip | 1 | ||
| Trip current (min, will always trip at 25°C still air) | IT | 1 | A | 25°C still air; per definition IT = minimum current at which the device will always trip | 1 | ||
| Maximum continuous voltage | Vmax | 60 | V | Maximum continuous voltage device can withstand without damage at rated current | 1 | ||
| Maximum fault current | Imax | 40 | A | Maximum fault current device can withstand without damage at rated voltage | 1 | ||
| Minimum resistance in initial (un-soldered) state | Rmin | 0.15 | Ω | Initial un-soldered state | 1 | ||
| Maximum resistance at 25°C one hour after reflow | R1max | 1.4 | Ω | 25°C, measured one hour after reflow | 1 | ||
| Hold current at ambient -40°C (thermal derating chart) | IH | 0.69 | A | Ambient operating temperature -40°C | 1 | ||
| Hold current at ambient -20°C (thermal derating chart) | IH | 0.59 | A | Ambient operating temperature -20°C | 1 | ||
| Hold current at ambient 0°C (thermal derating chart) | IH | 0.55 | A | Ambient operating temperature 0°C | 1 | ||
| Hold current at ambient 25°C (thermal derating chart) | IH | 0.5 | A | Ambient operating temperature 25°C | 1 | ||
| Hold current at ambient 40°C (thermal derating chart) | IH | 0.45 | A | Ambient operating temperature 40°C | 1 | ||
| Hold current at ambient 50°C (thermal derating chart) | IH | 0.43 | A | Ambient operating temperature 50°C | 1 | ||
| Hold current at ambient 60°C (thermal derating chart) | IH | 0.35 | A | Ambient operating temperature 60°C | 1 | ||
| Hold current at ambient 70°C (thermal derating chart) | IH | 0.3 | A | Ambient operating temperature 70°C | 1 | ||
| Hold current at ambient 85°C (thermal derating chart) | IH | 0.23 | A | Ambient operating temperature 85°C | 1 |
CAD (KiCad official)
- Symbol:
SRF1812P050 - 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:
srf1812p050-etched.step/srf1812p050-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);srf1812p050.step/srf1812p050.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: prosemi datasheet (3 pp, sha256
0f89034024a1602c, 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).