component
PESD3V3L1UB
Public Made by Adomby adom
UMW Electrostatic And Surge Protection (TVS/ESD), SOD-523. 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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README
markdownPESD3V3L1UB
UMW · Electrostatic And Surge Protection (TVS/ESD) · SOD-523
PESD3V3L1UB 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 | Pin 1 | passive | Pin 1 is one of the two terminals of the unidirectional ESD protection diode, with limits between pin 1 and pin 2 of VRWM 3.3 V, VCL 11 V at IPP 1 A, and ESD protection up to 30 kV (IEC 61000-4-2 level 4). |
| 2 | Pin 2 | passive | Pin 2 is the other terminal of the unidirectional ESD protection diode; the datasheet measures all electrical limits from pin 1 to pin 2, including peak pulse current 4.5 A (8/20 µs) and diode capacitance 34 pF. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOD-523 |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak pulse power | PPP | 45 | W | tp=8/20μs | 2 | ||
| Peak pulse current | IPP | 4.5 | A | tp=8/20μs | 2 | ||
| Junction temperature | TJ | 150 | °C | 2 | |||
| Ambient temperature | Tamb | -55 | 150 | °C | 2 | ||
| Storage temperature | TSTG | -65 | 150 | °C | 2 | ||
| Electrostatic discharge voltage (IEC 61000-4-2 contact discharge) | VESD | 30 | kV | IEC 61000-4-2 (contact discharge) | 2 | ||
| Electrostatic discharge voltage (machine model) | VESD | 400 | V | machine model | 2 | ||
| Electrostatic discharge voltage (human body model) | VESD | 16 | kV | MIL-STD-883 (human body model) | 2 | ||
| Breakdown voltage | VBR | 5.3 | 5.6 | 6 | V | IR=1mA | 3 |
| Reverse leakage current | IRM | 100 | nA | VRWM=3.3V | 3 | ||
| Reverse standoff voltage | VRWM | 3.3 | V | 3 | |||
| Diode capacitance | Cd | 34 | 40 | pF | VR=0V, f=1MHz | 3 | |
| Clamping voltage | VCL | 8 | V | IPP=1A | 3 | ||
| Clamping voltage | VCL | 11 | V | IPP=4.5A | 3 | ||
| Forward voltage | VF | 1.2 | V | IF=200mA | 3 |
CAD (KiCad official)
- Symbol:
PESD3V3L1UB - Footprint:
Diode_SMD:D_SOD-523 - 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files:
pesd3v3l1ub-etched.step/pesd3v3l1ub-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pesd3v3l1ub.step/pesd3v3l1ub.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UMW datasheet (7 pp, sha256
c423f3cf667af361, retrieved 2026-10-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).