component
MF-MSMF150
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BOURNS Resettable Fuses, 1812. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MF-MSMF150
BOURNS · Resettable Fuses · 1812
MF-MSMF150 from BOURNS, 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 of two interchangeable, non-polarized terminals (Ni/Au pad) of the PTC resettable fuse; Ihold 1.50 A, Itrip 3.00 A at 23 °C, Vmax 6.0 V, Imax 100 A. |
| 2 | 2 | passive | Second interchangeable, non-polarized terminal (Ni/Au pad) of the PTC resettable fuse; recommended pad 1.5 ± 0.05 mm wide with 2.7 ± 0.1 mm gap and 3.2 ± 0.1 mm length. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BOURNS |
| 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 |
|---|---|---|---|---|---|---|---|
| Operating temperature | -40 | 85 | °C | Environmental characteristics | 1 | ||
| Resistance, minimum (before trip) | Rmin | 0.03 | Ohms | In still air @ 23 °C | 1 | ||
| Resistance, maximum (R1max) | R1max | 0.12 | Ohms | In still air @ 23 °C | 1 | ||
| Time to trip, maximum | 8 | Seconds | At specified current, Vmax, 23 °C | 1 | |||
| Max. voltage (Vmax) | Vmax | 6 | Volts | 1 | |||
| Max. interrupt current (Imax) | Imax | 100 | Amperes | 1 | |||
| Passive aging resistance change | -5 | 5 | % | +85 °C, 1000 hours; typical resistance change | 1 | ||
| Humidity aging resistance change | -5 | 5 | % | +85 °C, 85 % R.H. 1000 hours; typical resistance change | 1 | ||
| Thermal shock resistance change | -10 | 10 | % | +85 °C to -40 °C, 20 times; typical resistance change | 1 | ||
| Reflow peak temperature (TP) | TP | 245 | 250 | °C | Solder reflow profile, peak temperature 250 °C +0/-5 °C | 4 | |
| Tripped power dissipation | 0.5 | Watts | at 23 °C | 1 | |||
| Power dissipation | 0.8 | Watts | at 23 °C | 1 | |||
| Hold current | Ihold | 1.5 | Amperes | at 23 °C | 1 | ||
| Trip current | Itrip | 3 | Amperes | at 23 °C | 1 | ||
| Hold current derating vs ambient -40 °C | Ihold | 2.17 | Amperes | Thermal derating chart, ambient -40 °C | 4 | ||
| Hold current derating vs ambient -20 °C | Ihold | 1.95 | Amperes | Thermal derating chart, ambient -20 °C | 4 | ||
| Hold current derating vs ambient 0 °C | Ihold | 1.72 | Amperes | Thermal derating chart, ambient 0 °C | 4 | ||
| Hold current derating vs ambient 23 °C | Ihold | 1.5 | Amperes | Thermal derating chart, ambient 23 °C | 4 | ||
| Hold current derating vs ambient 40 °C | Ihold | 1.3 | Amperes | Thermal derating chart, ambient 40 °C | 4 | ||
| Hold current derating vs ambient 50 °C | Ihold | 1.18 | Amperes | Thermal derating chart, ambient 50 °C | 4 | ||
| Hold current derating vs ambient 60 °C | Ihold | 1.09 | Amperes | Thermal derating chart, ambient 60 °C | 4 | ||
| Hold current derating vs ambient 70 °C | Ihold | 0.97 | Amperes | Thermal derating chart, ambient 70 °C | 4 | ||
| Hold current derating vs ambient 85 °C | Ihold | 0.82 | Amperes | Thermal derating chart, ambient 85 °C | 4 |
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 | gold | Terminal material: Electroless Ni under immersion Au | 3 |
CAD (KiCad official)
- Symbol:
MF-MSMF150 - 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:
mf-msmf150-etched.step/mf-msmf150-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mf-msmf150.step/mf-msmf150.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BOURNS datasheet (5 pp, sha256
e0cfbb785a81edd0, retrieved 2026-10-17, 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).
# MF-MSMF150
**BOURNS** · Resettable Fuses · 1812
MF-MSMF150 from BOURNS, 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 of two interchangeable, non-polarized terminals (Ni/Au pad) of the PTC resettable fuse; Ihold 1.50 A, Itrip 3.00 A at 23 °C, Vmax 6.0 V, Imax 100 A. |
| 2 | 2 | passive | Second interchangeable, non-polarized terminal (Ni/Au pad) of the PTC resettable fuse; recommended pad 1.5 ± 0.05 mm wide with 2.7 ± 0.1 mm gap and 3.2 ± 0.1 mm length. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BOURNS |
| 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 |
|---|---|---|---|---|---|---|---|
| Operating temperature | | -40 | | 85 | °C | Environmental characteristics | 1 |
| Resistance, minimum (before trip) | Rmin | 0.03 | | | Ohms | In still air @ 23 °C | 1 |
| Resistance, maximum (R1max) | R1max | | | 0.12 | Ohms | In still air @ 23 °C | 1 |
| Time to trip, maximum | | | | 8 | Seconds | At specified current, Vmax, 23 °C | 1 |
| Max. voltage (Vmax) | Vmax | | | 6 | Volts | | 1 |
| Max. interrupt current (Imax) | Imax | | | 100 | Amperes | | 1 |
| Passive aging resistance change | | -5 | | 5 | % | +85 °C, 1000 hours; typical resistance change | 1 |
| Humidity aging resistance change | | -5 | | 5 | % | +85 °C, 85 % R.H. 1000 hours; typical resistance change | 1 |
| Thermal shock resistance change | | -10 | | 10 | % | +85 °C to -40 °C, 20 times; typical resistance change | 1 |
| Reflow peak temperature (TP) | TP | 245 | | 250 | °C | Solder reflow profile, peak temperature 250 °C +0/-5 °C | 4 |
| Tripped power dissipation | | | 0.5 | | Watts | at 23 °C | 1 |
| Power dissipation | | | 0.8 | | Watts | at 23 °C | 1 |
| Hold current | Ihold | | 1.5 | | Amperes | at 23 °C | 1 |
| Trip current | Itrip | | 3 | | Amperes | at 23 °C | 1 |
| Hold current derating vs ambient -40 °C | Ihold | | 2.17 | | Amperes | Thermal derating chart, ambient -40 °C | 4 |
| Hold current derating vs ambient -20 °C | Ihold | | 1.95 | | Amperes | Thermal derating chart, ambient -20 °C | 4 |
| Hold current derating vs ambient 0 °C | Ihold | | 1.72 | | Amperes | Thermal derating chart, ambient 0 °C | 4 |
| Hold current derating vs ambient 23 °C | Ihold | | 1.5 | | Amperes | Thermal derating chart, ambient 23 °C | 4 |
| Hold current derating vs ambient 40 °C | Ihold | | 1.3 | | Amperes | Thermal derating chart, ambient 40 °C | 4 |
| Hold current derating vs ambient 50 °C | Ihold | | 1.18 | | Amperes | Thermal derating chart, ambient 50 °C | 4 |
| Hold current derating vs ambient 60 °C | Ihold | | 1.09 | | Amperes | Thermal derating chart, ambient 60 °C | 4 |
| Hold current derating vs ambient 70 °C | Ihold | | 0.97 | | Amperes | Thermal derating chart, ambient 70 °C | 4 |
| Hold current derating vs ambient 85 °C | Ihold | | 0.82 | | Amperes | Thermal derating chart, ambient 85 °C | 4 |
## 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 | | gold | Terminal material: Electroless Ni under immersion Au | 3 |
## CAD (KiCad official)
- Symbol: `MF-MSMF150`
- 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: `mf-msmf150-etched.step` / `mf-msmf150-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mf-msmf150.step` / `mf-msmf150.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [BOURNS datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588884586343878656) (5 pp, sha256 `e0cfbb785a81edd0`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-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).
[Datasheet PDF](docs/mf-msmf150-datasheet.pdf)