component

TPSMB300A-A

Public Made by Adom

by adom

Littelfuse ESD And Surge Protection (TVS/ESD), DO-214AA. 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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TPSMB300A-A

Littelfuse · ESD And Surge Protection (TVS/ESD) · DO-214AA

TPSMB300A-A from Littelfuse, in a DO-214AA. 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 K passive Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint.
2 A passive Anode.

Key specifications

Parameter Value
Manufacturer Littelfuse
Package DO-214AA
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
Breakdown voltage VBR, minimum VBR 285 V @ IT = 1 mA (unidirectional TPSMB300A-A) 2
Breakdown voltage VBR, maximum VBR 315 V @ IT = 1 mA (unidirectional TPSMB300A-A) 2
Maximum clamping voltage VC 414 V @ Ipp = 1.5 A (Ipp column of same row) 2
Maximum peak pulse current Ipp 1.5 A 2
Maximum reverse leakage current IR 1 µA @ VR = 256 V (same row) 2
Maximum temperature coefficient of VBR αT (VBR) 0.11 %/C 2
Reverse stand-off voltage VR 256 V Stand-off voltage as printed in ordering table row for TPSMB300A-A 2
Peak pulse power dissipation PPPM 600 W 10/1000µs waveform (Fig.1) (Notes 1, 2) 1
Power dissipation on infinite heat sink PM(AV) 5 W TL = 50°C, infinite heat sink 1
Peak forward surge current IFSM 100 A 8.3 ms single half sine wave (Note 3) 1
Operating junction temperature range (VBR > 91V) TJ -65 150 °C VBR > 91V 1
Storage temperature range TSTG -65 175 °C 1
Typical thermal resistance junction to lead RθJL 20 °C/W Typical 1
Typical thermal resistance junction to ambient RθJA 100 °C/W Typical 1

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 tin 260°C/10 seconds at terminals ■ Matte tin lead-free plated 1

CAD (KiCad official)

  • Symbol: TPSMB300A-A
  • Footprint: Diode_SMD:D_SMB
  • 3D model: DO-214AA (KiCad packages3D, STEP)
  • 3D model files: tpsmb300a-a-etched.step / tpsmb300a-a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tpsmb300a-a.step / tpsmb300a-a.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Littelfuse datasheet (6 pp, sha256 8cc50e1afb0bea8d, retrieved 2026-10-16, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary cathode-band 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