component
TPSMB33CA
Public Made by Adomby adom
Littelfuse TVS, DO-214AA. Pinout cross-checked by two models against the datasheet, 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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Contents
README
markdownTPSMB33CA
Littelfuse · TVS · DO-214AA
TPSMB33CA 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 | A1 | passive | Bidirectional TVS terminal with no polarity, standoff voltage VR 28.2 V, breakdown 31.4 to 34.7 V at 1 mA, and maximum clamping voltage 45.7 V at 13.3 A. |
| 2 | A2 | passive | Second bidirectional TVS terminal, interchangeable with the other terminal (no cathode band on bidirectional parts), 600 W peak pulse power at 10/1000 µs. |
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 | 31.4 | 34.7 | V | @ IT = 1 mA | 2 | |
| Maximum Clamping Voltage | VC | 45.7 | V | @ Ipp = 13.3 A | 2 | ||
| Maximum Peak Pulse Current | Ipp | 13.3 | A | 2 | |||
| Maximum Reverse Leakage | IR | 1 | µA | @ VR | 2 | ||
| Reverse Stand-off Voltage | VR | 28.2 | V | 2 | |||
| Test Current | IT | 1 | mA | 2 | |||
| Typical IR at 150°C | IR | 8 | µA | 150°C | 2 | ||
| Maximum Temperature coefficient of VBR | αT | 0.094 | %/C | 2 | |||
| Peak Pulse Power Dissipation | PPPM | 600 | W | 10/1000µs waveform | 1 | ||
| Power Dissipation on infinite heat sink | PM(AV) | 5 | W | TL=50°C | 1 | ||
| Operating Junction Temperature Range (VBR≤91V) | TJ | -65 | 175 | °C | VBR≤91V | 1 | |
| Storage Temperature Range | TSTG | -65 | 175 | °C | 1 | ||
| Typical Thermal Resistance Junction to Lead | RθJL | 20 | °C/W | 1 | |||
| Typical Thermal Resistance Junction to Ambient | RθJA | 100 | °C/W | 1 | |||
| VBR voltage tolerance | -5 | 5 | % | 5% VBR voltage tolerance (A suffix per part numbering) | 6 |
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 | seconds at terminals • Matte tin lead-free plated | 1 |
CAD (KiCad official)
- Symbol:
TPSMB33CA - Footprint:
Diode_SMD:D_SMB - 3D model: DO-214AA (KiCad packages3D, STEP)
- 3D model files:
tpsmb33ca-etched.step/tpsmb33ca-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tpsmb33ca.step/tpsmb33ca.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (6 pp, sha256
11f500633484b187, retrieved 2026-10-27, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-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).