component

SZMMBZ33VAWT1G

Public Made by Adom

by adom

onsemi ESD And Surge Protection (TVS/ESD), SC-70-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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docs Publish 0.1.0 · Ray 17d ago
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package.json Publish 0.1.0 · Ray 17d ago
page.json Set visibility: public · Ray 17d ago
README.md Publish 0.1.0 · Ray 17d ago
szmmbz33vawt1g-etched.glb Publish 0.1.0 · Ray 17d ago
szmmbz33vawt1g-etched.step szmmbz33vawt1g: factory component page (tier=lcsc) · Ray 17d ago
szmmbz33vawt1g-hero.glb szmmbz33vawt1g: hero GLB from the etched model (keeps the MPN mark) · Ray 17d ago
szmmbz33vawt1g-hero.overlay.json Publish 0.1.0 · Ray 17d ago
szmmbz33vawt1g.glb Publish 0.1.0 · Ray 17d ago
szmmbz33vawt1g.kicad_mod Publish 0.1.0 · Ray 17d ago
szmmbz33vawt1g.kicad_sym Publish 0.1.0 · Ray 17d ago
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szmmbz33vawt1g.step Publish 0.1.0 · Ray 17d ago

SZMMBZ33VAWT1G

onsemi · ESD And Surge Protection (TVS/ESD) · SC-70-3

SZMMBZ33VAWT1G from onsemi, in a SC-70-3. 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 CATHODE 1 passive Cathode of the first Zener junction in the dual common-anode device; used as a unidirectional Zener when the circuit is tied to pins 1 and 3.
2 CATHODE 2 passive Cathode of the second Zener junction in the dual common-anode device; used as a unidirectional Zener when the circuit is tied to pins 2 and 3.
3 ANODE passive Common anode shared by both Zener junctions, which protects two separate lines with one package; the datasheet also allows a single bidirectional configuration.

Key specifications

Parameter Value
Manufacturer onsemi
Package SC-70-3
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
Breakdown voltage (min/nom/max) at IT VBR 31.35 33 34.65 V @ IT = 1.0 mA 2
Maximum reverse leakage current IR 50 nA @ VRWM 2
Maximum temperature coefficient of VBR VBR 30.4 mV/°C 2
Forward voltage VF 0.9 V @ IF = 10 mA 2
Peak power dissipation Ppk 40 W @ 1.0 ms (Note 1), TL ≤ 25°C 2
Total power dissipation on FR-5 board PD 200 mW @ TA = 25°C (Note 2) 2
Junction and storage temperature range TJ, Tstg -55 150 °C 2
Thermal resistance junction-to-ambient RθJA 618 °C/W 2
Working peak reverse voltage VRWM 26 V 2
Clamping voltage VC 46 V @ IPP = 0.87 A (Note 4) 2
Maximum reverse peak pulse current IPP 0.87 A 2

CAD (KiCad official)

  • Symbol: SZMMBZ33VAWT1G
  • Footprint: Package_TO_SOT_SMD:SOT-323_SC-70
  • 3D model: SC-70-3 (KiCad packages3D, STEP)
  • 3D model files: szmmbz33vawt1g-etched.step / szmmbz33vawt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); szmmbz33vawt1g.step / szmmbz33vawt1g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (6 pp, sha256 f889917352bb8aa4, 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