component
MF-NSML300
Public Made by Adomby adom
BOURNS Resettable Fuses, 1206. 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
markdownMF-NSML300
BOURNS · Resettable Fuses · 1206
MF-NSML300 from BOURNS, in a 1206. 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 | BOURNS |
| Package | 1206 |
| 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 |
|---|---|---|---|---|---|---|---|
| Resistance (minimum, Rmin) | Rmin | 0.003 | Ω | at 23 °C | 1 | ||
| Resistance after trip (maximum, R1max) | R1max | 0.024 | Ω | at 23 °C | 1 | ||
| Maximum current (Imax) | Imax | 50 | A | 1 | |||
| Maximum time to trip | 5 | s | at 8 A test current | 1 | |||
| Operating temperature | -40 | 85 | °C | 1 | |||
| Storage temperature before opening | 40 | °C | Before opening, 70 % RH max | 1 | |||
| Passive aging resistance change (typical) | -10 | 10 | % | +85 °C, 1000 hours | 1 | ||
| Humidity aging resistance change (typical) | -15 | 15 | % | +85 °C, 85 % R.H., 100 hours | 1 | ||
| Thermal shock resistance change (typical) | -30 | 30 | % | -40 °C to +85 °C, 20 times | 1 | ||
| Hold current | Ihold | 3 | A | at 23 °C | 1 | ||
| Trip current | Itrip | 6 | A | at 23 °C | 1 | ||
| Tripped power dissipation | 1 | W | at 23 °C | 1 | |||
| Ihold derating at ambient -40 °C | Ihold | 4.41 | A | Ambient operating temperature -40 °C | 3 | ||
| Ihold derating at ambient -20 °C | Ihold | 3.99 | A | Ambient operating temperature -20 °C | 3 | ||
| Ihold derating at ambient 0 °C | Ihold | 3.54 | A | Ambient operating temperature 0 °C | 3 | ||
| Ihold derating at ambient 23 °C | Ihold | 3 | A | Ambient operating temperature 23 °C | 3 | ||
| Ihold derating at ambient 40 °C | Ihold | 2.55 | A | Ambient operating temperature 40 °C | 3 | ||
| Ihold derating at ambient 50 °C | Ihold | 2.32 | A | Ambient operating temperature 50 °C | 3 | ||
| Ihold derating at ambient 60 °C | Ihold | 2.13 | A | Ambient operating temperature 60 °C | 3 | ||
| Ihold derating at ambient 70 °C | Ihold | 1.71 | A | Ambient operating temperature 70 °C | 3 | ||
| Ihold derating at ambient 85 °C | Ihold | 1.38 | A | Ambient operating temperature 85 °C | 3 |
CAD (KiCad official)
- Symbol:
MF-NSML300 - Footprint:
Fuse:Fuse_1206_3216Metric - 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files:
mf-nsml300-etched.step/mf-nsml300-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mf-nsml300.step/mf-nsml300.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BOURNS datasheet (7 pp, sha256
c44e1bc5ca268455, retrieved 2026-10-18, 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).