component
ESDA37LY
Public Made by Adomby adom
STMicroelectronics ESD And Surge Protection (TVS/ESD), SOT-23. 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
markdownESDA37LY
STMicroelectronics · ESD And Surge Protection (TVS/ESD) · SOT-23
ESDA37LY 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 | I/O1 | passive | Protected line 1 (Transil cathode, unidirectional diode to pin 3), with 37 V min and 43.3 V max breakdown voltage at 1 mA and 36 V stand-off voltage; pins 1 and 2 alone form a bidirectional suppressor. |
| 2 | I/O2 | passive | Protected line 2 (Transil cathode, unidirectional diode to pin 3), with 37 V min and 43.3 V max breakdown voltage at 1 mA and 36 V stand-off voltage; pins 1 and 2 alone form a bidirectional suppressor. |
| 3 | GND | power_in | Common anode of both Transil diodes, connected to ground as the return for ESD and surge current (up to 6.3 A peak pulse current, 8/20 µs). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23 |
| Category | Circuit Protection |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
ESDA37LY - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
esda37ly-etched.step/esda37ly-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);esda37ly.step/esda37ly.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (12 pp, sha256
ae72cb53fa1cc894, retrieved 2026-10-07, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).