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onsemi MM5Z12VT5G
- Part No.:
- MM5Z12VT5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
MM5Z12VT5G.pdf
- Description:
- DIODE ZENER 12V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:18,275
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Product details
Overview
MM5Z12VT5G from onsemi is a 12 V, ±8.3% tolerance Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with 25 Ω maximum Zener impedance at 5 mA test current and 0.1 µA reverse leakage at 9.6 V. It provides precision voltage regulation in space-constrained portable electronics.
For engineers reviewing the MM5Z12VT5G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, ESD robustness (Class 3, >16 kV HBM), and direct-fit alternatives for compact voltage reference and overvoltage protection designs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 12 V nominal Zener voltage is specified at IZT = 5 mA with ±8.3% tolerance, and exhibits a positive temperature coefficient of +6.0 mV/°C - enabling predictable drift compensation in bias networks.
The device uses a thermosetting plastic SOD-523 case with 100% matte tin lead finish, qualified to MSL 1 and rated for peak reflow at 260 °C. Its low-profile dimensions (1.20 mm × 0.80 mm × 0.60 mm) and 0.7 mm body height support high-density PCB layouts without compromising thermal performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 12 V at 5 mA - defines regulated output voltage under standard test condition |
| Zener Tolerance | ±8.3% (11.4–12.7 V range) - sets absolute accuracy bound for voltage reference use |
| Max Zener Impedance | 25 Ω at 5 mA - determines regulation stiffness and output ripple suppression capability |
| Power Dissipation | 500 mW at 25 °C - establishes maximum continuous power handling on FR-4 board |
| Reverse Leakage | 0.1 µA at 9.6 V - ensures minimal standby current in undervoltage clamp circuits |
| ESD Rating | Class 3 (>16 kV HBM) - enables direct integration into handheld ESD-sensitive interfaces |
| Package | SOD-523 (1.20 × 0.80 × 0.60 mm) - supports 0201-class footprint density with automated placement |
Pinout & Package
SOD-523 surface-mount package with cathode marked by polarity band; 2-terminal construction optimized for low-inductance, high-frequency clamping and reference applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased during Zener operation |
| 2 (Unmarked End) | Anode | Connected to circuit ground or lower-potential rail; completes conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD-523 footprint | Enables placement in <1.0 mm pitch routing zones without solder bridging risk |
| 500 mW power rating | Supports transient surge absorption up to 500 mW without thermal runaway on standard FR-4 |
| Class 3 ESD immunity | Eliminates need for external HBM protection in consumer USB and audio interface paths |
| +6.0 mV/°C tempco | Allows predictable voltage shift in temperature-compensated biasing networks |
| Pb-Free & RoHS compliant | Meets IPC-J-STD-020 moisture sensitivity level 1 and global environmental compliance mandates |
Applications
| USB Power Rail Clamp | Smartphone Battery Monitor Reference |
|---|---|
Use Scenario: Clamping 5 V USB supply against ESD transients and overvoltage spikes during hot-plug events. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown as shunt voltage limiter. Use Value: 12 V breakdown prevents downstream LDO or PMIC damage while maintaining <0.1 µA leakage at nominal 5 V rail. | Use Scenario: Providing stable 12 V reference for ADC-based battery voltage sensing in Li-ion fuel gauges. IC Role / Device Role / Timing Role: Precision voltage reference source with known tempco for ratiometric measurement calibration. Use Value: ±8.3% tolerance and +6.0 mV/°C tempco enable software compensation to achieve <1% total error over −20 to +70 °C. |
| Wearable Sensor Bias Network | IoT Node Reset Circuit |
Use Scenario: Generating stable bias voltage for MEMS accelerometer analog front-end in ultra-thin wearables. IC Role / Device Role / Timing Role: Low-power Zener reference supplying bias current to op-amp input stage. Use Value: 500 mW rating and 25 Ω ZZT ensure <10 mV output variation across 10–100 µA load current range. | Use Scenario: Holding microcontroller reset line low until 12 V rail stabilizes during power-up sequencing. IC Role / Device Role / Timing Role: Voltage threshold detector via resistor divider + Zener clamp configuration. Use Value: 12 V nominal breakdown enables precise reset assertion timing with <1% hysteresis using standard 1% resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C12 | 12 V, ±5% tolerance, 300 mW, SOD-523, 30 Ω ZZT @ 5 mA | Higher accuracy but lower power rating limits surge handling | Select when tighter voltage tolerance is prioritized over transient energy absorption |
| MMSZ5242BT1G | 12 V, ±5% tolerance, 500 mW, SOD-123, 30 Ω ZZT @ 20 mA | Larger SOD-123 package increases board area by 2.5× vs. SOD-523 | Select when existing layout accommodates SOD-123 and higher test current stability is required |
Compared with BZX584-C12 and MMSZ5242BT1G, the MM5Z12VT5G uniquely balances 500 mW power handling, SOD-523 miniaturization, and Class 3 ESD robustness - making it optimal for next-gen portable devices where board space, surge resilience, and manufacturability are co-constrained.
Availability
MM5Z12VT5G is available at Aetrix Electronics and suitable for cellular phones, handheld portables, and high-density PC boards requiring stable component supply and full Pb-free compliance.
Supply support for MM5Z12VT5G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MM5ZxxxT5G series is part of onsemi's precision Zener regulator portfolio designed specifically for space-constrained, high-reliability voltage reference and overvoltage protection in portable and wearable electronics.
FAQ
What is the Zener voltage tolerance of MM5Z12VT5G?
The MM5Z12VT5G has a nominal Zener voltage of 12 V with a tolerance of ±8.3%, corresponding to a guaranteed range of 11.4 V to 12.7 V at 5 mA test current and 25 °C ambient temperature. This tolerance is defined per the standard tolerance series in the onsemi datasheet and applies directly to the MM5Z12VT5G device marking "0N".
Does MM5Z12VT5G support lead-free reflow soldering?
Yes, MM5Z12VT5G is Pb-free and RoHS compliant, with a matte tin lead finish qualified for peak reflow temperatures up to 260 °C. It meets MSL 1 requirements and is compatible with standard lead-free reflow profiles, including J-STD-020-compliant ramp rates and time-above-liquidus specifications.
What is the maximum reverse leakage current for MM5Z12VT5G?
The maximum reverse leakage current for MM5Z12VT5G is 0.1 µA at VR = 9.6 V and TA = 25 °C. This value is specified in the Electrical Characteristics table and reflects the device's ability to minimize standby power loss in clamp and reference configurations.
How does the temperature coefficient affect MM5Z12VT5G performance?
The MM5Z12VT5G has a temperature coefficient of +6.0 mV/°C, meaning its Zener voltage increases linearly with junction temperature. This allows predictable voltage drift modeling in bias networks and enables software-based compensation in precision reference applications over −20 to +70 °C operating ranges.
Is MM5Z12VT5G suitable for ESD protection in USB interfaces?
Yes, MM5Z12VT5G is rated Class 3 (>16 kV) per Human Body Model, making it suitable for secondary-level ESD protection in USB 2.0 data lines and VBUS clamping. Its fast response and low capacitance (<130 pF at 0 V) prevent signal integrity degradation while absorbing transient energy without latch-up.
MM5Z12VT5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±5.42%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
MM5Z12VT5G FAQ
1.How can I place an order for MM5Z12VT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5Z12VT5G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MM5Z12VT5G reliable?
The price and inventory of MM5Z12VT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z12VT5G is usually 5 days.
3.What payment methods are accepted for MM5Z12VT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z12VT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5Z12VT5G?
MM5Z12VT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5Z12VT5G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MM5Z12VT5G?
For technical support, including MM5Z12VT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z12VT5G requirements.
6.How does Aetrix verify that MM5Z12VT5G is sourced from the original manufacturer or authorized distributors?
All MM5Z12VT5G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MM5Z12VT5G meets industry standards.
7.What is the process for return or replacement of MM5Z12VT5G?
All MM5Z12VT5G units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z12VT5G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MM5Z12VT5G part is unused and in its original packaging.
Return procedure for MM5Z12VT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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