component

ESDA37W

Public Made by Adom

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STMicroelectronics ESD And Surge Protection (TVS/ESD), SOT-323-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ESDA37W

STMicroelectronics · ESD And Surge Protection (TVS/ESD) · SOT-323-3

ESDA37W from STMicroelectronics, in a SOT-323-3. 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 connected to the cathode of the first unidirectional Transil diode, with 36 V stand-off voltage (VRM) and 37 V min breakdown voltage; it can be used with pin 2 as a bidirectional suppressor.
2 I/O2 passive Protected line 2 connected to the cathode of the second unidirectional Transil diode, with 36 V stand-off voltage (VRM) and 37 V min breakdown voltage; it can be used with pin 1 as a bidirectional suppressor.
3 COMMON passive Common anode of both Transil diodes, normally connected to ground (the functional diagram shows no pin name).

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SOT-323-3
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
Operating junction temperature range Tj -40 150 °C 2
Storage junction temperature range Tstg -65 150 °C 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
Peak pulse power Ppp 300 W 8/20 µs 2
Peak pulse current (ESDA37W) Ipp 6.3 A 8/20 µs 2
Maximum lead temperature for soldering TL 260 °C during 10 s at 5 mm from case 2
Breakdown voltage (min) VBR 37 V IR = 1 mA, Tamb = 25 °C 2
Breakdown voltage (max) VBR 43.3 V IR = 1 mA, Tamb = 25 °C 2
Leakage current IRM 1 µA VRM = 36 V, Tamb = 25 °C 2
Dynamic impedance Rd 2400 mΩ Square pulse Ipp = 15 A, tp = 2.5 µs 2
Forward voltage drop VF 0.9 V IF = 10 mA, Tamb = 25 °C 2
Voltage temperature coefficient αT 11 10-4/°C 2
Line capacitance Cline 48 pF at 0 V bias, Tamb = 25 °C 2

CAD (KiCad official)

  • Symbol: ESDA37W
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SOT-323-3 (KiCad packages3D, STEP)
  • 3D model files: esda37w-etched.step / esda37w-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); esda37w.step / esda37w.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: STMicroelectronics datasheet (10 pp, sha256 c5901c48288c0431, retrieved 2026-10-16, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-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).

Datasheet PDF