Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

Symbol & Footprint

Schematic Symbol

Open full view ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

PCB Footprint

Open full view ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

Datasheet

Open in new tab ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

Download PDF

Contents

Pinout
Key specifications
Electrical characteristics
CAD (KiCad official)
Provenance

README

markdown

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