component
P6SMB440A
Public Made by Adomby adom
UMW TVS, SMB. 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
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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
markdownP6SMB440A
UMW · TVS · SMB
P6SMB440A from UMW, in a SMB. 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 | UMW |
| Package | SMB |
| 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 at IT (P6SMB440A) | VBR | 418 | 462 | V | IT test current 1 mA (mA column); pulse test tp ≤ 50 ms (note 1) | 4 | |
| Maximum reverse leakage at VWM | IR | 1 | µA | at VWM | 4 | ||
| Maximum peak pulse current | IPPM | 1 | A | surge current waveform per fig. 3 (note 2) | 4 | ||
| Maximum clamping voltage at IPPM | VC | 602 | V | at IPPM | 4 | ||
| Maximum temperature coefficient of VBR | 0.11 | %/°C | 4 | ||||
| Stand-off voltage | VWM | 376 | V | 4 | |||
| Maximum instantaneous forward voltage | VF | 3.5 | V | at 50.0 A for unidirectional only (note 4) | 2 | ||
| Peak forward surge current | IFSM | 100 | A | 8.3 ms single half sine-wave, unidirectional only (note 2) | 2 | ||
| Peak power dissipation | PPPM | 600 | W | 10/1000 µs waveform (notes 1, 2) (fig. 1) | 2 | ||
| Power dissipation on infinite heatsink | PD | 5 | W | TA=50 °C | 2 | ||
| Junction and storage temperature range | TJ,TSTG | -65 | 150 | °C | 2 |
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 | Terminals: matte tin plated leads, solderable per | 1 |
CAD (KiCad official)
- Symbol:
P6SMB440A - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
p6smb440a-etched.step/p6smb440a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);p6smb440a.step/p6smb440a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UMW datasheet (8 pp, sha256
cabdacd2d207d7c2, retrieved 2026-10-21, 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).