component
PESD3V3U1UB
Public Made by Adomby adom
UMW ESD And Surge Protection (TVS/ESD), SOD-523. 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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PESD3V3U1UB
UMW · ESD And Surge Protection (TVS/ESD) · SOD-523
PESD3V3U1UB from UMW, in a SOD-523. 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 | SOD-523 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse standoff voltage | VRWM | 3.3 | V | 2 | |||
| Reverse leakage current | IRM | 1 | nA | VRWM=3V | 2 | ||
| Breakdown voltage | VBR | 4.5 | 5.6 | 6.8 | V | IR=5mA | 2 |
| Diode capacitance | Cd | 2.6 | 3.1 | pF | VR=0V, f=1MHz | 2 | |
| Electrostatic discharge voltage, IEC 61000-4-2 contact discharge | VESD | 9 | kV | IEC 61000-4-2 (contact discharge), ten non-repetitive pulses | 2 | ||
| Electrostatic discharge voltage, human body model | VESD | 10 | kV | MIL-STD-883 (human body model) | 2 | ||
| Junction temperature | TJ | 150 | °C | 2 | |||
| Ambient temperature | Tamb | -55 | 150 | °C | 2 | ||
| Storage temperature | TSTG | -65 | 150 | °C | 2 |
CAD (KiCad official)
- Symbol:
PESD3V3U1UB - Footprint:
Diode_SMD:D_SOD-523 - 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files:
pesd3v3u1ub-etched.step/pesd3v3u1ub-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pesd3v3u1ub.step/pesd3v3u1ub.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UMW datasheet (7 pp, sha256
8e0e615782ddc97f, 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).
# PESD3V3U1UB
**UMW** · ESD And Surge Protection (TVS/ESD) · SOD-523
PESD3V3U1UB from UMW, in a SOD-523. 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 | SOD-523 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse standoff voltage | VRWM | | | 3.3 | V | | 2 |
| Reverse leakage current | IRM | | | 1 | nA | VRWM=3V | 2 |
| Breakdown voltage | VBR | 4.5 | 5.6 | 6.8 | V | IR=5mA | 2 |
| Diode capacitance | Cd | | 2.6 | 3.1 | pF | VR=0V, f=1MHz | 2 |
| Electrostatic discharge voltage, IEC 61000-4-2 contact discharge | VESD | | | 9 | kV | IEC 61000-4-2 (contact discharge), ten non-repetitive pulses | 2 |
| Electrostatic discharge voltage, human body model | VESD | | | 10 | kV | MIL-STD-883 (human body model) | 2 |
| Junction temperature | TJ | | | 150 | °C | | 2 |
| Ambient temperature | Tamb | -55 | | 150 | °C | | 2 |
| Storage temperature | TSTG | -65 | | 150 | °C | | 2 |
## CAD (KiCad official)
- Symbol: `PESD3V3U1UB`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `pesd3v3u1ub-etched.step` / `pesd3v3u1ub-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pesd3v3u1ub.step` / `pesd3v3u1ub.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [UMW datasheet](docs/pesd3v3u1ub-datasheet.pdf) (7 pp, sha256 `8e0e615782ddc97f`, retrieved 2026-10-21, 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](docs/pesd3v3u1ub-datasheet.pdf)