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SPD81581A-2

Public Made by Adom

by 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.

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SPD81581A-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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); spd81581a-2.step / spd81581a-2.glb are 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, primary two-terminal convention (convention), consensus off (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