component
SPD81581A-2
Public Made by Adomby adom
WILLSEMI(Will Semicon) TVS, SMA(DO-214AC). 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
markdownSPD81581A-2
WILLSEMI(Will Semicon) · TVS · SMA(DO-214AC)
SPD81581A-2 from WILLSEMI(Will Semicon), in a SMA(DO-214AC). 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 | WILLSEMI(Will Semicon) |
| Package | SMA(DO-214AC) |
| Category | TVS/Fuse/Board Level 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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage | VBR | 64.4 | 74.1 | V | @ IT = 1.0 mA, TA=25°C | 2 | |
| Maximum Clamping Voltage | VC | 93.6 | V | @ IPP = 4.3 A, TA=25°C | 2 | ||
| Maximum Reverse Leakage | IR | 1 | μA | @ VR = 58 V, TA=25°C | 2 | ||
| Maximum Peak Pulse Current | IPP | 4.3 | A | TA=25°C | 2 | ||
| Peak Pulse Power | PPPM | 400 | W | 10/1000µs waveform | 2 | ||
| Peak Pulse Current | IPPM | 4.3 | A | 10/1000µs waveform | 2 | ||
| Peak Forward Surge Current | IFSM | 40 | A | 8.3ms single half sine-wave superimposed on rated load (JEDEC method) | 2 | ||
| Junction Temperature | TJ | -55 | 150 | ℃ | 2 | ||
| Operating Temperature | TOP | -40 | 125 | ℃ | 2 | ||
| Storage Temperature Range | TSTG | -55 | 150 | ℃ | 2 | ||
| Reverse Stand off Voltage | VR | 58 | V | TA=25°C | 2 | ||
| Test Current | IT | 1 | mA | TA=25°C | 2 |
CAD (KiCad official)
- Symbol:
SPD81581A-2 - Footprint:
Diode_SMD:D_SMA - 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files:
spd81581a-2-etched.step/spd81581a-2-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);spd81581a-2.step/spd81581a-2.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WILLSEMI(Will Semicon) datasheet (4 pp, sha256
b5294a1b5323bf6e, retrieved 2026-10-22, 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).