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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206

Name	Last commit message	Last updated
docs	Publish 0.1.0 · Ray	21d ago
viewers	sz1sma16cat3g: symbol repaired (bidirectional TVS (the page says so)) · Ray	1d ago
package.json	Publish 0.1.0 · Ray	21d ago
page.json	Set visibility: public · Ray	21d ago
README.md	Publish 0.1.0 · Ray	21d ago
sz1sma16cat3g-etched.glb	Publish 0.1.0 · Ray	21d ago
sz1sma16cat3g-etched.step	sz1sma16cat3g: factory component page (tier=lcsc) · Ray	21d ago
sz1sma16cat3g-hero.glb	sz1sma16cat3g: hero GLB from the etched model (keeps the MPN mark) · Ray	21d ago
sz1sma16cat3g-hero.overlay.json	Publish 0.1.0 · Ray	21d ago
sz1sma16cat3g.glb	Publish 0.1.0 · Ray	21d ago
sz1sma16cat3g.kicad_mod	Publish 0.1.0 · Ray	21d ago
sz1sma16cat3g.kicad_sym	sz1sma16cat3g: symbol repaired (bidirectional TVS (the page says so)) · Ray	1d ago
sz1sma16cat3g.lbr	sz1sma16cat3g: symbol repaired (bidirectional TVS (the page says so)) · Ray	1d ago
sz1sma16cat3g.step	Publish 0.1.0 · Ray	21d ago

SZ1SMA16CAT3G

Littelfuse · ESD And Surge Protection (TVS/ESD) · SMA

SZ1SMA16CAT3G from Littelfuse, in a SMA. 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	A1	passive	Bi-directional TVS terminal 1 (SZ1SMA16CAT3G, VRWM 16 V, VBR 17.8-19.67 V @ 1 mA, VC 26.0 V @ 15.4 A); the part is symmetric so either terminal may connect to the line or return.
2	A2	passive	Bi-directional TVS terminal 2 (SZ1SMA16CAT3G, VRWM 16 V, VBR 17.8-19.67 V @ 1 mA, VC 26.0 V @ 15.4 A); the part is symmetric so either terminal may connect to the line or return.

Key specifications

Parameter	Value
Manufacturer	Littelfuse
Package	SMA
Category	Circuit Protection
Pins	2

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 (bi-directional, 16 V)	VBR	17.8	18.74	19.67	V	@ IT = 1 mA (Note 7: measured at 25°C)	4
Maximum Reverse Leakage Current	IR			2.5	µA	@ VRWM = 16 V	4
Peak Power Dissipation	PPK			400	W	TL = 25°C, pulse width = 1 ms (Note 1)	1
DC Power Dissipation @ TL = 75°C (zero lead length)	PD			1.5	W	TL = 75°C, measured zero lead length (Note 2)	1
DC Power Dissipation @ TA = 25°C	PD			0.5	W	TA = 25°C, FR-4 minimum recommended footprint (Note 3)	1
Operating and Storage Temperature Range	TJ, Tstg	-65		150	°C		1
Thermal Resistance Junction-to-Lead	RθJL		50		°C/W	Measured zero lead length (Note 2)	1
Thermal Resistance Junction-to-Ambient	RθJA		250		°C/W	FR-4 board, Littelfuse minimum recommended footprint (Note 3)	1

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part	Material	Colour / plating	Datasheet says	Page
contacts		tin	and the terminal finish material is tin(Sn) (IPC/	1

CAD (KiCad official)

Symbol: SZ1SMA16CAT3G
Footprint: Diode_SMD:D_SMA
3D model: SMA (KiCad packages3D, STEP)
3D model files: sz1sma16cat3g-etched.step / sz1sma16cat3g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sz1sma16cat3g.step / sz1sma16cat3g.glb are the bare package body.

Provenance

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

Datasheet: Littelfuse datasheet (7 pp, sha256 2dcbd1b5c6bf6a05, retrieved 2026-10-16, 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