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Home > Products > Integrated Circuits (ICs) > Specialized ICs > MM3Z12VST
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MM3Z12VST

Manufacturer Part Number:
MM3Z12VST
Manufacturer / Brand
ON
Part of Description:
594
Datasheets:
Lead Free Status / RoHS Status:
RoHS Compliant
Stock Condition:
New original, 16071 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number MM3Z12VST
Manufacturer / Brand ON
Stock Quantity 16071 pcs Stock
Category Integrated Circuits (ICs) > Specialized ICs
Description 594
Lead Free Status / RoHS Status: RoHS Compliant
Condition New Original Stock
Warranty 100% Perfect Functions
Lead Time 2-3days after payment.
Payment Credit Card / PayPal / Telegraphic Transfer (T/T) / Western Union
Shipping by DHL / Fedex / UPS / TNT
Port HongKong
RFQ Email Info@IC-Components.com

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



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Beneficiary Bank Address : Tsuen Wan Market Street Branch 53 Market Street, Tsuen Wan N.T., Hong Kong

Any inquires or questions, please kindly contact us Email: Info@IC-Components.com


Frequently Asked Questions

What are the key design considerations when integrating the MM3Z12VST Zener diode into a power supply clamp circuit for ESD protection in industrial control systems?
The MM3Z12VST is suitable for low-power clamping applications, but its maximum average forward current of 200mA and power dissipation of 500mW limit its use in high-current scenarios. Engineers must ensure that transient energy during ESD events does not exceed these ratings to avoid thermal runaway or failure. Proper PCB layout with short trace lengths and adequate ground plane support is essential to minimize parasitic inductance, which could otherwise cause voltage overshoots exceeding the 12V breakdown voltage under fast transients.
Can the MM3Z12VST be used as a substitute for a standard 12V Zener diode in a microcontroller’s VDD rail without additional components?
While the MM3Z12VST has a nominal Zener voltage of 12V, its tolerance (±5%) may result in inconsistent clamping thresholds across production units. In sensitive analog or digital circuits where precise voltage regulation is required, adding a series resistor or using a dedicated voltage supervisor IC is recommended to prevent overvoltage conditions that could damage the MCU powered by the same rail.
How does the reverse leakage current of the MM3Z12VST affect long-term reliability in battery-powered or low-power monitoring devices?
With a typical reverse leakage current of 0.5µA at 10V reverse bias, the MM3Z12VST introduces minimal static power loss, making it acceptable for most low-power applications. However, in ultra-low-power systems such as IoT sensors operating on coin-cell batteries, even this leakage can accumulate over time and contribute to premature discharge. Designers should evaluate total quiescent current impact and consider alternative ultra-low-leakage diodes if battery life is critical.
Is the MM3Z12VST suitable for automotive-grade applications requiring AEC-Q101 qualification?
No, the MM3Z12VST is not specified or qualified under AEC-Q101 standards. Automotive environments expose components to wide temperature ranges, humidity, and mechanical stress, necessitating certified parts. For automotive designs, engineers should select an automotive-qualified equivalent such as the ON Semiconductor MM3Z12VST-Q1, which meets IATF 16949 requirements and extended temperature range (-40°C to +125°C).
What precautions should be taken when soldering the MM3Z12VST onto a high-reliability PCB in harsh industrial environments?
Given its SOD323 package size (approximately 1.2mm x 0.8mm), the MM3Z12VST is prone to thermal stress during reflow soldering. To ensure joint integrity, use a controlled reflow profile with peak temperature below 260°C and avoid prolonged exposure above 240°C. Additionally, conformal coating may degrade over time in humid or corrosive atmospheres; selection should account for environmental sealing requirements common in factory automation systems.
How does the dynamic impedance of the MM3Z12VST compare to higher-power Zener diodes, and what implications does this have for voltage stabilization in linear regulator feedback loops?
The MM3Z12VST exhibits a dynamic impedance of approximately 7Ω, which is relatively high compared to larger packages like DO-35 or SMB. This limits its effectiveness as a standalone regulator in precision voltage references. In feedback networks of switching regulators where small load variations occur, this impedance can cause measurable output droop. Therefore, it is better suited for transient protection than steady-state regulation, and external filtering capacitors should be included to stabilize the reference node.
Can the MM3Z12VST replace the BZX84 series in a 12V clamping application without redesigning the surrounding circuitry?
The BZX84-C12 and MM3Z12VST both offer 12V Zener voltages, but differences exist in package, power rating, and response speed. The BZX84 typically comes in SOT-23 and has higher power dissipation (up to 500mW in some variants). Swapping directly may require verifying footprint compatibility and thermal performance, especially if the original design relies on heatsinking. Also, note that the BZX84 often features tighter voltage tolerances (±2%), offering better consistency—critical in precision circuits. Always simulate transient response before substitution.
What are the limitations of using the MM3Z12VST for input protection on a 3.3V GPIO line powered by a 5V rail?
Applying a 12V Zener across a 3.3V GPIO pin risks damaging the input even during normal operation if the upstream source occasionally exceeds 3.8V due to noise or misconfiguration. The MM3Z12VST’s breakdown voltage is too high for effective 5V system protection. Instead, a lower-voltage clamp (e.g., 3.6V) should be used, or a bidirectional TVS diode rated closer to the system voltage. Using the MM3Z12VST here would likely fail during routine operation and void device reliability.
Does the absence of lead-free marking on the MM3Z12VST affect compliance with RoHS regulations in consumer electronics manufacturing?
All modern ON Semiconductor diodes, including the MM3Z12VST, are manufactured under RoHS-compliant processes regardless of packaging markings. The absence of explicit "Pb-Free" labeling does not indicate non-compliance; rather, it reflects legacy branding practices. As long as procurement documents confirm RoHS status from the distributor or manufacturer, the part is safe for use in EU and global markets requiring halogen-free and lead-free assemblies.
In what scenarios should engineers avoid using the MM3Z12VST despite its compact size and low cost?
Avoid using the MM3Z12VST in high-frequency switching circuits where parasitic capacitance (~4pF typical) might interact with fast edges, causing signal distortion or coupling noise into sensitive analog traces. Additionally, do not deploy it in applications requiring continuous reverse conduction or active regulation—its intended role is transient suppression. In motor drive or power factor correction stages where sustained overvoltage events occur, higher-energy clamps like SMAJ12A are more appropriate due to superior surge handling capability.

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MM3Z12VST

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594

In Stock: 16071

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