component

SZSM05T1G

Public Made by Adom

by adom

onsemi 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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SZSM05T1G

onsemi · ESD And Surge Protection (TVS/ESD) · SOT-23

SZSM05T1G from onsemi, 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 CATHODE passive Cathode of the first protection junction; per the datasheet, a unidirectional circuit is tied between pins 1 and 3 (or 2 and 3), and the device's working peak reverse voltage range is 5.0 V to 36 V.
2 CATHODE passive Cathode of the second protection junction; per the datasheet, a unidirectional circuit is tied between pins 2 and 3 (or 1 and 3), and the device's working peak reverse voltage range is 5.0 V to 36 V.
3 ANODE passive Common anode shared by both internal junctions, which the datasheet describes as protecting two separate lines from one package; the same pin is used for the single bidirectional configuration.

Key specifications

Parameter Value
Manufacturer onsemi
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
Working Peak Reverse Voltage (SM05 device) VRWM 5 V 2
Maximum Reverse Leakage Current IR 10 µA @ VRWM 2
Breakdown Voltage VBR 6.2 V @ IT = 1.0 mA 2
Breakdown Voltage VBR 7.3 V @ IT = 1.0 mA 2
Clamping Voltage VC 9.8 V @ IPP = 1 A 2
Maximum Reverse Peak Pulse Current IPP 17 A Max IPP, 8/20 µs pulse (Note 4) 2
Typical Diode Capacitance 225 pF Pin 1 to 3 @ 0 Volts 2
Peak Power Dissipation Ppk 300 W @ 20 µs (Note 1) @ TL ≤ 25°C 2
ESD Air Discharge (IEC 61000-4-2) -15 15 kV IEC 61000-4-2 Air 2
ESD Contact Discharge (IEC 61000-4-2) -26 26 kV IEC 61000-4-2 Contact 2
EFT Current (IEC 61000-4-4) 40 A IEC 61000-4-4 (EFT) 2
Lightning Current (IEC 61000-4-5) 12 A IEC 61000-4-5 (Lightning) 2
Total Power Dissipation on FR-5 Board PD 225 mW @ TA = 25°C (Note 2) 2
Derating above 25°C, FR-5 Board 1.8 mW/°C Derate above 25°C 2
Thermal Resistance, Junction-to-Ambient, FR-5 Board RθJA 556 °C/W FR-5 Board (Note 2) 2
Total Power Dissipation on Alumina Substrate PD 300 mW @ TA = 25°C (Note 3) 2
Derating above 25°C, Alumina Substrate 2.4 mW/°C Derate above 25°C 2
Thermal Resistance, Junction-to-Ambient, Alumina Substrate RθJA 417 °C/W Alumina Substrate (Note 3) 2
Junction and Storage Temperature Range TJ, Tstg -55 150 °C 2
Lead Solder Temperature, Maximum TL 260 °C 10 second duration 2

CAD (KiCad official)

  • Symbol: SZSM05T1G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: szsm05t1g-etched.step / szsm05t1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); szsm05t1g.step / szsm05t1g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (6 pp, sha256 8e7fda85cfb0bd8f, retrieved 2026-10-19, 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