component
TPSMB300A-A
Public Made by Adomby 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.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Contents
README
markdownTPSMB300A-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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tpsmb300a-a.step/tpsmb300a-a.glbare 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, primarycathode-band 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).