

Overview
The MM3Z12VB is a zener Diode made by onsemi in a SOD-323F package with 2 pins. 1 Independent 11.76V~12.24V 12V 141Ω 200mW 23Ω 90nA@8V SOD-323F Zener Diodes ROHS.
PCBKit's library has its KiCad symbol (Diode:MM3Zxx, from KiCad's library) and its footprint (Diode_SMD:D_SOD-323F, from KiCad's library), ready for a KiCad board. 9,731 are in stock at JLCPCB (part C891576). 1 open-source board in 1 repository on GitHub use it.
Symbol
Footprint
Parameters
8- Diode Configuration
- 1 Independent
- Impedance(Zzk)
- 141Ω
- Impedance(Zzt)
- 23Ω
- Pd - Power Dissipation
- 200mW
- Reverse Leakage Current (Ir)
- 90nA@8V
- Tolerance
- ±2%
- Zener Voltage(Nom)
- 12V
- Zener Voltage(Range)
- 11.76V~12.24V
Order codes
1- MM3Z12VBLCSC C891576
Pinout
2| Pin | Name | Type |
|---|---|---|
| 1 | K | Passive |
| 2 | A | Passive |
Open-source boards using it
All 1- 4 layers162 × 100 mm

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<iframe src="https://pcbkit.io/embed/parts/onsemi/MM3Z12VB" title="MM3Z12VB in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/onsemi/MM3Z12VB.jpg" alt="MM3Z12VB" width="1200" height="900">[](https://pcbkit.io/parts/onsemi/MM3Z12VB)Questions
Is there a KiCad symbol and footprint for the MM3Z12VB?
Yes. The symbol is Diode:MM3Zxx and the footprint Diode_SMD:D_SOD-323F, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the MM3Z12VB?
SOD-323F, with 2 pins. Its footprint is drawn on this page.
Where is the MM3Z12VB datasheet?
onsemi publishes it: the Datasheet link on this page opens it.
Where can I order the MM3Z12VB?
JLCPCB lists it as part C891576, with 9,731 in stock; the sellers' links on this page open their listings.
What can replace the MM3Z12VB?
Parts like it in the library: the MM3Z12BW by Shandong Jingdao Microelectronics, the BZX84J-B12 by Nexperia, the BZT52B12LS-TP by Micro Commercial Components and the PZU12B1 by Nexperia. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the MM3Z12VB?
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
8MM3Z12BW
SOD-323W-55℃~+150℃ 1 Independent 100nA 11.76V~12.24V 12V 300mW 35Ω SOD-323W Zener Diodes ROHSShandong Jingdao MicroelectronicsZener DiodesBZX84J-B12
SOD-323F1 Independent 100nA@8V 10Ω 11.8V~12.2V 12V 550mW SOD-323F Zener Diodes ROHSNexperiaZener DiodesBZT52B12LS-TP
SOD-323FLZener DiodesMicro Commercial ComponentsPZU12B1
SOD-323F1 Independent 100nA@9V 10Ω 11.42V~11.9V 12V 310mW SOD-323F Zener Diodes ROHSNexperiaZener DiodesPZU12B3
SOD-323F1 Independent 100nA@9V 10Ω 12.08V~12.6V 12V 310mW ±2% SOD-323F Zener Diodes ROHSNexperiaZener DiodesUDZS12B
SOD-323FZener DiodesTaiwan SemiconductorUDZVTE-1712B
SOD-323F1 Independent 100nA@9V 11.74V~12.24V 12V 200mW 30Ω SOD-323F Zener Diodes ROHSROHM SemiconductorZener DiodesBZX84J-C12,115
SOD-323F1 Independent 100nA@8V 10Ω 11.4V~12.7V 12V 550mW SOD-323F Zener Diodes ROHSNexperiaZener Diodes