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ESDA5V3LY
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STMicroelectronics ESD And Surge Protection (TVS/ESD), SOT-23. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.
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ESDA5V3LY
STMicroelectronics · ESD And Surge Protection (TVS/ESD) · SOT-23
ESDA5V3LY from STMicroelectronics, in a SOT-23. 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 | Anode of diode D1; protected signal line 1; stand-off voltage VRM = 3 V (IRM max 2 µA), breakdown voltage VBR = 5.3-5.9 V at IR = 1 mA, forward voltage VF max 1.25 V at IF = 200 mA. |
| 2 | A2 | passive | Anode of diode D2; protected signal line 2; same ratings as pin 1 (VRM = 3 V, VBR = 5.3-5.9 V at 1 mA); pins 1 and 2 may be connected together for bidirectional suppressor use. |
| 3 | K | passive | Common cathode of D1 and D2; connect to supply or clamping rail; peak pulse current Ipp max 25 A (8/20 µs), dynamic impedance Rd typ 280 mΩ, line capacitance Cline typ 220 pF at 0 V bias. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23 |
| Category | Circuit Protection |
| Pins | 3 |
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 min | VBR | 5.3 | V | at IR = 1 mA | 3 | ||
| Breakdown voltage max | VBR | 5.9 | V | at IR = 1 mA | 3 | ||
| Reverse leakage current max | IRM | 2 | µA | at VRM = 3 V | 3 | ||
| Dynamic impedance max | Rd | 280 | mΩ | Square pulse Ipp = 15 A, tp = 2.5 µs | 3 | ||
| Forward voltage max | VF | 1.25 | V | at IF = 200 mA | 3 | ||
| Line capacitance | Cline | 220 | pF | at 0 V bias | 3 | ||
| Peak pulse power | Ppp | 300 | W | 8/20 µs | 2 | ||
| Peak pulse current | Ipp | 25 | A | 8/20 µs, ESDA5V3LY | 2 | ||
| Peak pulse voltage contact discharge | Vpp | 30 | kV | ISO 10605 C = 330 pF, R = 330 Ω, contact discharge | 2 | ||
| Peak pulse voltage air discharge | Vpp | 30 | kV | ISO 10605 C = 330 pF, R = 330 Ω, air discharge | 2 | ||
| Operating junction temperature range | Tj | -40 | 150 | °C | 2 | ||
| Storage junction temperature range | Tstg | -65 | 150 | °C | 2 | ||
| Maximum soldering temperature | TL | 260 | °C | during 10 s | 2 | ||
| Temperature coefficient of breakdown voltage | αT | 5 | 10-4/°C | ΔVBR = αT x (Tamb -25 °C) x VBR(25 °C) | 3 |
CAD (KiCad official)
- Symbol:
ESDA5V3LY - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
esda5v3ly-etched.step/esda5v3ly-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);esda5v3ly.step/esda5v3ly.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (12 pp, sha256
f99725629ff69da5, retrieved 2026-10-20, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).
# ESDA5V3LY
**STMicroelectronics** · ESD And Surge Protection (TVS/ESD) · SOT-23
ESDA5V3LY from STMicroelectronics, in a SOT-23. 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 | Anode of diode D1; protected signal line 1; stand-off voltage VRM = 3 V (IRM max 2 µA), breakdown voltage VBR = 5.3-5.9 V at IR = 1 mA, forward voltage VF max 1.25 V at IF = 200 mA. |
| 2 | A2 | passive | Anode of diode D2; protected signal line 2; same ratings as pin 1 (VRM = 3 V, VBR = 5.3-5.9 V at 1 mA); pins 1 and 2 may be connected together for bidirectional suppressor use. |
| 3 | K | passive | Common cathode of D1 and D2; connect to supply or clamping rail; peak pulse current Ipp max 25 A (8/20 µs), dynamic impedance Rd typ 280 mΩ, line capacitance Cline typ 220 pF at 0 V bias. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23 |
| Category | Circuit Protection |
| Pins | 3 |
## 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 min | VBR | 5.3 | | | V | at IR = 1 mA | 3 |
| Breakdown voltage max | VBR | | | 5.9 | V | at IR = 1 mA | 3 |
| Reverse leakage current max | IRM | | | 2 | µA | at VRM = 3 V | 3 |
| Dynamic impedance max | Rd | | | 280 | mΩ | Square pulse Ipp = 15 A, tp = 2.5 µs | 3 |
| Forward voltage max | VF | | | 1.25 | V | at IF = 200 mA | 3 |
| Line capacitance | Cline | | 220 | | pF | at 0 V bias | 3 |
| Peak pulse power | Ppp | | | 300 | W | 8/20 µs | 2 |
| Peak pulse current | Ipp | | | 25 | A | 8/20 µs, ESDA5V3LY | 2 |
| Peak pulse voltage contact discharge | Vpp | | | 30 | kV | ISO 10605 C = 330 pF, R = 330 Ω, contact discharge | 2 |
| Peak pulse voltage air discharge | Vpp | | | 30 | kV | ISO 10605 C = 330 pF, R = 330 Ω, air discharge | 2 |
| Operating junction temperature range | Tj | -40 | | 150 | °C | | 2 |
| Storage junction temperature range | Tstg | -65 | | 150 | °C | | 2 |
| Maximum soldering temperature | TL | | | 260 | °C | during 10 s | 2 |
| Temperature coefficient of breakdown voltage | αT | | 5 | | 10-4/°C | ΔVBR = αT x (Tamb -25 °C) x VBR(25 °C) | 3 |
## CAD (KiCad official)
- Symbol: `ESDA5V3LY`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `esda5v3ly-etched.step` / `esda5v3ly-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esda5v3ly.step` / `esda5v3ly.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586182873388339200) (12 pp, sha256 `f99725629ff69da5`, retrieved 2026-10-20, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).
[Datasheet PDF](docs/esda5v3ly-datasheet.pdf)