component
MMBZ12VALT1G
Public Made by Adomby adom
onsemi ESD And Surge Protection (TVS/ESD), SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMMBZ12VALT1G
onsemi · ESD And Surge Protection (TVS/ESD) · SOT-23
MMBZ12VALT1G 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 1 | passive | Cathode of the first Zener junction; with pin 3 (anode) it forms one unidirectional clamp, and the datasheet rates the 12 V device at 40 W peak power for 1.0 ms. |
| 2 | CATHODE 2 | passive | Cathode of the second Zener junction; with pin 3 (anode) it forms a second unidirectional clamp, and the two junctions share the common anode to protect two separate lines. |
| 3 | ANODE | passive | Common anode shared by both internal Zener junctions; it is tied to the reference line (for example GND) in the common-anode applications shown, and it is used with pins 1 or 2 for unidirectional operation or with both cathodes for bidirectional operation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOT-23 |
| Category | Circuit Protection |
| Pins | 3 |
CAD (KiCad official)
- Symbol:
MMBZ12VALT1G - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbz12valt1g-etched.step/mmbz12valt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbz12valt1g.step/mmbz12valt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (7 pp, sha256
19582c7544b26b99, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).