component

SZ1SMB30CAT3G

Public Made by Adom

by adom

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

componentcircuit protectionsz1smb30cat3gfactory-2.0.0extractor-text

Verified SZ1SMB30CAT3G

by Ray · last 6 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

6 Nov 2026RayPublished by the parts factory: tier lcsc, 2 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: SZ1SMB30CAT3G · SMB · 2 pins
  • ✓copper: 2 copper pads, none touching another net
  • ✓datasheet: all 2 pin names found in the 7-page datasheet
  • ✓distributor: lcsc C1976130, digikey SZ1SMB30CAT3GTR-ND, mouser 863-SZ1SMB30CAT3G
  • ✓family: D_SMB
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-6zt1scuv/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 2 pins = 2 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 2 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ sz1smb30cat3g.kicad_sym✓ sz1smb30cat3g.kicad_mod✓ sz1smb30cat3g.step
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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 12h ago
viewers sz1smb30cat3g: viewers · Ray 12h ago
package.json Publish 0.1.0 · Ray 12h ago
page.json Set visibility: public · Ray 12h ago
README.md Publish 0.1.0 · Ray 12h ago
sz1smb30cat3g-etched.glb Publish 0.1.0 · Ray 12h ago
sz1smb30cat3g-etched.step sz1smb30cat3g: factory component page (tier=lcsc) · Ray 12h ago
sz1smb30cat3g-hero.glb sz1smb30cat3g: hero GLB from the etched model (keeps the MPN mark) · Ray 12h ago
sz1smb30cat3g-hero.overlay.json Publish 0.1.0 · Ray 12h ago
sz1smb30cat3g.glb Publish 0.1.0 · Ray 12h ago
sz1smb30cat3g.kicad_mod Publish 0.1.0 · Ray 12h ago
sz1smb30cat3g.kicad_sym Publish 0.1.0 · Ray 12h ago
sz1smb30cat3g.lbr Publish 0.1.0 · Ray 12h ago
sz1smb30cat3g.step Publish 0.1.0 · Ray 12h ago
verification.json Verified: Published by the parts factory: tier lcsc, 2 pins · Ray 12h ago

SZ1SMB30CAT3G

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

SZ1SMB30CAT3G from Littelfuse, in a SMB. 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 Terminal 1 is labeled Cathode on the SMB package drawing; the datasheet marks the cathode with a color band on uni-directional parts, and this bi-directional (CA) variant has no polarity band.
2 Anode passive Terminal 2 is labeled Anode on the SMB package drawing; the datasheet gives no electrical limits for individual pins.

Key specifications

Parameter Value
Manufacturer Littelfuse
Package SMB
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 VBR 33.3 35.06 36.8 V @ IT = 1.0 mA (Note 7) 4
Maximum Reverse Leakage Current IR 5 µA @ VRWM = 30 V 4
Working Peak Reverse Voltage VRWM 30 V 4
Clamping Voltage VC 48.4 V @ IPP = 12.4 A (Note 8) 4
Maximum Reverse Peak Pulse Current IPP 12.4 A 10/1000 µs waveform (Note 8) 4
Peak Power Dissipation PPK 600 W TL = 25°C, pulse width = 1 ms (Note 1) 1
DC Power Dissipation PD 3 W TL = 75°C, measured zero lead length (Note 2) 1
Derate Above 75°C 40 mW/°C Above TL = 75°C 1
Thermal Resistance Junction-to-Lead RθJL 25 °C/W 1
DC Power Dissipation PD 0.55 W TA = 25°C (Note 3) 1
Derate Above 25°C 4.4 mW/°C Above TA = 25°C 1
Thermal Resistance Junction-to-Ambient RθJA 226 °C/W 1
Operating and Storage Temperature Range TJ, Tstg -65 150 °C 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: SZ1SMB30CAT3G
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB (KiCad packages3D, STEP)
  • 3D model files: sz1smb30cat3g-etched.step / sz1smb30cat3g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sz1smb30cat3g.step / sz1smb30cat3g.glb are the bare package body.

Provenance

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

  • Datasheet: Littelfuse datasheet (7 pp, sha256 b867ff8d1ae59140, retrieved 2026-11-06, 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