component
TPSMB18A
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
markdownTPSMB18A
Littelfuse · TVS · DO-214AA
TPSMB18A 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 | Cathode | passive | Cathode terminal of the unidirectional TVS (marked by the color band), connected to the protected line, with VR 15.3 V stand-off and VBR 17.1 V typ (15.3-18.9 V min/max band at 1 mA) for TPSMB18A. |
| 2 | Anode | passive | Anode terminal of the unidirectional TVS, normally connected to ground, with maximum clamping voltage VC 25.5 V at Ipp 24.2 A for TPSMB18A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse |
| Package | DO-214AA |
| 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 | 15.3 | 18.9 | V | @ IT = 1 mA | 2 | |
| Reverse Stand-off Voltage | VR | 15.3 | V | 2 | |||
| Maximum Clamping Voltage | VC | 25.5 | V | @ Ipp = 24.2 A | 2 | ||
| Maximum Peak Pulse Current | Ipp | 24.2 | A | 2 | |||
| Maximum Reverse Leakage Current | IR | 1 | µA | @ VR | 2 | ||
| Maximum Temperature Coefficient of VBR | αT | 0.083 | %/C | 2 | |||
| Typical IR at 150°C | IR | 8 | µA | @150°C | 2 | ||
| Maximum Instantaneous Forward Voltage | VF | 3.5 | V | at 50A, unidirectional only, VBR<300V | 1 | ||
| 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 | ||
| Peak Forward Surge Current | IFSM | 100 | A | 8.3ms single half sine wave, unidirectional only | 1 | ||
| Operating Junction Temperature Range | TJ | -65 | 175 | °C | VBR≤91V | 1 | |
| Storage Temperature Range | TSTG | -65 | 175 | °C | 1 | ||
| Thermal Resistance Junction to Lead | RθJL | 20 | °C/W | Typical | 1 | ||
| Thermal Resistance Junction to Ambient | RθJA | 100 | °C/W | Typical | 1 | ||
| VBR Voltage Tolerance | -5 | 5 | % | 5% VBR voltage tolerance (A suffix) | 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:
TPSMB18A - Footprint:
Diode_SMD:D_SMB - 3D model: DO-214AA (KiCad packages3D, STEP)
- 3D model files:
tpsmb18a-etched.step/tpsmb18a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tpsmb18a.step/tpsmb18a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Littelfuse datasheet (6 pp, sha256
0ac950ffb3161f3d, retrieved 2026-10-22, 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).