component
ESDA37L
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UMW ESD And Surge Protection (TVS/ESD), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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ESDA37L
UMW · ESD And Surge Protection (TVS/ESD) · SOT-23
ESDA37L from UMW, 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 | 1 | passive | Line 1 protection terminal of the diode array; the datasheet says pins 1 and 2 can be connected together as a bidirectional suppressor, and the device is rated for 30 kV ESD (IEC 61000-4-2 contact/air). |
| 2 | 2 | passive | Line 2 protection terminal of the diode array; the datasheet says pins 1 and 2 are used together for bidirectional suppression, with a 300 W (8/20 µs) peak pulse power rating. |
| 3 | 3 | passive | Function not stated in the datasheet text; the pinning figure shows it as the third SOT-23 lead, and no electrical role is given. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| 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) at IR 1 mA | VBR | 36 | V | VBR at IR = 1 mA (ESDA37L) | 3 | ||
| Breakdown voltage (max) at IR 1 mA | VBR | 43.3 | V | VBR at IR = 1 mA (ESDA37L) | 3 | ||
| Leakage current IRM at VRM | IRM | 1 | µA | at VRM = 36 V | 3 | ||
| Dynamic impedance Rd | Rd | 2400 | mΩ | Square pulse Ipp=15A, tp=2.5µs | 3 | ||
| Forward voltage drop | VF | 0.9 | V | at IF = 10 mA | 3 | ||
| Breakdown current leakage (features) | IR | 20 | µA | at VBR | 1 | ||
| Voltage temperature coefficient αT | αT | 10 | 10-4/°C | ΔVBR = αT x (Tamb -25 °C) x VBR(25 °C) | 3 | ||
| Peak pulse power (8/20 µs) | PPP | 300 | W | 8/20 µs | 2 | ||
| Peak pulse current (8/20 µs) | IPP | 6.3 | A | 8/20 µs | 2 | ||
| Peak pulse voltage, IEC 61000-4-2 contact discharge | VPP | 30 | kV | IEC 61000-4-2 contact discharge | 2 | ||
| Peak pulse voltage, IEC 61000-4-2 air discharge | VPP | 30 | kV | IEC 61000-4-2 air discharge | 2 | ||
| Junction temperature range | TJ | -40 | 150 | °C | 2 | ||
| Storage junction temperature range | TSTG | -65 | 150 | °C | 2 | ||
| Maximum lead temperature for soldering | TL | 260 | °C | during 10 s at 5 mm from case | 2 |
CAD (KiCad official)
- Symbol:
ESDA37L - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
esda37l-etched.step/esda37l-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);esda37l.step/esda37l.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UMW datasheet (7 pp, sha256
d7e3a80bb7121903, retrieved 2026-10-18, 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).
# ESDA37L
**UMW** · ESD And Surge Protection (TVS/ESD) · SOT-23
ESDA37L from UMW, 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 | 1 | passive | Line 1 protection terminal of the diode array; the datasheet says pins 1 and 2 can be connected together as a bidirectional suppressor, and the device is rated for 30 kV ESD (IEC 61000-4-2 contact/air). |
| 2 | 2 | passive | Line 2 protection terminal of the diode array; the datasheet says pins 1 and 2 are used together for bidirectional suppression, with a 300 W (8/20 µs) peak pulse power rating. |
| 3 | 3 | passive | Function not stated in the datasheet text; the pinning figure shows it as the third SOT-23 lead, and no electrical role is given. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| 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) at IR 1 mA | VBR | 36 | | | V | VBR at IR = 1 mA (ESDA37L) | 3 |
| Breakdown voltage (max) at IR 1 mA | VBR | | | 43.3 | V | VBR at IR = 1 mA (ESDA37L) | 3 |
| Leakage current IRM at VRM | IRM | | | 1 | µA | at VRM = 36 V | 3 |
| Dynamic impedance Rd | Rd | | | 2400 | mΩ | Square pulse Ipp=15A, tp=2.5µs | 3 |
| Forward voltage drop | VF | | | 0.9 | V | at IF = 10 mA | 3 |
| Breakdown current leakage (features) | IR | | | 20 | µA | at VBR | 1 |
| Voltage temperature coefficient αT | αT | | 10 | | 10-4/°C | ΔVBR = αT x (Tamb -25 °C) x VBR(25 °C) | 3 |
| Peak pulse power (8/20 µs) | PPP | | | 300 | W | 8/20 µs | 2 |
| Peak pulse current (8/20 µs) | IPP | | | 6.3 | A | 8/20 µs | 2 |
| Peak pulse voltage, IEC 61000-4-2 contact discharge | VPP | | | 30 | kV | IEC 61000-4-2 contact discharge | 2 |
| Peak pulse voltage, IEC 61000-4-2 air discharge | VPP | | | 30 | kV | IEC 61000-4-2 air discharge | 2 |
| Junction temperature range | TJ | -40 | | 150 | °C | | 2 |
| Storage junction temperature range | TSTG | -65 | | 150 | °C | | 2 |
| Maximum lead temperature for soldering | TL | | | 260 | °C | during 10 s at 5 mm from case | 2 |
## CAD (KiCad official)
- Symbol: `ESDA37L`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `esda37l-etched.step` / `esda37l-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esda37l.step` / `esda37l.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [UMW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8755876766924201984) (7 pp, sha256 `d7e3a80bb7121903`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/esda37l-datasheet.pdf)