component
MMBZ33VAL
Public Made by Adomby adom
DOWO ESD And Surge Protection (TVS/ESD), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownMMBZ33VAL
DOWO · ESD And Surge Protection (TVS/ESD) · SOT-23
MMBZ33VAL from DOWO, 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 | K1 | passive | Cathode of the first Zener diode (unidirectional line 1, circuit tied to pins 1 and 3), with VBR 31.35V min to 34.65V max at IT=1mA and VRWM 26.0V for MMBZ33VAL. |
| 2 | K2 | passive | Cathode of the second Zener diode (unidirectional line 2, circuit tied to pins 2 and 3), with VBR 31.35V min to 34.65V max at IT=1mA and VRWM 26.0V for MMBZ33VAL. |
| 3 | A | passive | Common anode of both Zener diodes, shared by the two protected lines; the pair can also be used as a single bidirectional configuration. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | DOWO |
| Package | SOT-23 |
| Category | Circuit Protection |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
MMBZ33VAL - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbz33val-etched.step/mmbz33val-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbz33val.step/mmbz33val.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: DOWO datasheet (5 pp, sha256
3c3e6f105b61864b, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).