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onsemi SZMM5Z12VT5G
- Part No.:
- SZMM5Z12VT5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z12VT5G.pdf
- Description:
- DIODE ZENER 12V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:6,903
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Product details
Overview
SZMM5Z12VT5G from onsemi is a 12 V Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with ±5% tolerance (11.4–12.7 V), 25 Ω max Zener impedance at 5 mA test current, and 16 kV ESD rating per HBM. It serves as a compact voltage reference or overvoltage clamp in space-constrained portable electronics.
For engineers reviewing the SZMM5Z12VT5G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal derating behavior above 25 °C, SOD-523 footprint compatibility, and AEC-Q101 qualification status for automotive use cases.
Technical Context
This device operates as a two-terminal voltage-regulating diode, conducting in reverse breakdown to maintain stable voltage across its terminals under defined current conditions. Its 12 V nominal Zener voltage is specified at IZT = 5 mA, with maximum dynamic impedance of 25 Ω and temperature coefficient of ±6.0 mV/°C.
The SOD-523 package enables high-density PCB placement with 1.20 mm × 0.80 mm body and 0.7 mm height. It supports reflow up to 260 °C, meets MSL 1 requirements, and features 100% matte tin lead finish on a void-free thermosetting plastic case compliant with UL 94 V-0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.4–12.7 V @ IZT = 5 mA - defines clamping threshold range for precision regulation |
| Power Rating (PD) | 500 mW @ TA = 25 °C - sets maximum continuous dissipation before thermal derating begins |
| Zener Impedance (ZZT) | ≤25 Ω @ IZT = 5 mA - determines output voltage stability under load transients |
| ESD Rating (HBM) | >16 kV - ensures robustness against handling-induced electrostatic discharge in assembly |
| Package | SOD-523 (1.20 × 0.80 × 0.70 mm) - enables ultra-compact layout on high-density PCBs |
| Temperature Coefficient | ±6.0 mV/°C - quantifies voltage drift over operating junction temperature range |
| Leakage Current (IR) | ≤0.1 μA @ VR = 8.0 V - confirms low off-state conduction in standby mode |
Pinout & Package
SOD-523 surface-mount package with cathode marked by polarity band; 2-terminal configuration optimized for minimal board area and automated placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased terminal during Zener operation |
| 2 | Anode | Connected to ground or lower-potential reference; completes current path during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and infotainment power rails |
| Pb-Free & RoHS compliant | Meets global environmental compliance mandates without requiring process change in lead-free assembly |
| MSL 1 rating | Allows unlimited floor life and single-reflow processing without dry-pack requirements |
| UL 94 V-0 epoxy | Provides flame-retardant encapsulation essential for safety-critical portable devices |
| Low-profile 0.7 mm height | Enables stacking under shields or integration into ultra-thin handheld form factors |
Applications
| Battery Protection Circuit | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Prevents damage to Li-ion battery management ICs during surge events on charging input lines. IC Role / Device Role / Timing Role: Voltage-clamping element placed between input rail and ground to shunt excess energy above 12 V. Use Value: Limits transient voltage to ≤12.7 V with sub-μA leakage below 8 V, preserving battery efficiency during normal operation. | Use Scenario: Safeguards USB data/power ICs from ESD or hot-plug overshoot on VBUS line. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing HBM-level discharges before they reach sensitive PHY circuitry. Use Value: Delivers >16 kV HBM protection while occupying <1 mm² PCB area-critical for miniaturized USB-C modules. |
| Automotive Sensor Reference | High-Density PC Board Voltage Monitor |
Use Scenario: Supplies stable 12 V reference for analog front-end circuits in ADAS camera modules. IC Role / Device Role / Timing Role: Precision voltage reference source with ±5% tolerance and low TC for sensor biasing. Use Value: Maintains accuracy across −40 °C to +125 °C ambient due to AEC-Q101 qualification and controlled tempco. | Use Scenario: Monitors 12 V supply rail integrity in server motherboard VRM feedback loops. IC Role / Device Role / Timing Role: Secondary overvoltage detection node verifying primary regulator output stability. Use Value: Integrates into tight 0.5 mm pitch routing zones thanks to SOD-523's 1.2 × 0.8 mm footprint and no thermal pad requirement. |
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 | Same 12 V nominal Zener, but SOD-323 package (1.7 × 1.3 mm); 350 mW power rating; ±5% tolerance | Larger footprint and lower power limit reduce suitability for ultra-dense layouts or higher-power clamping | Select when legacy SOD-323 land pattern exists and thermal margin exceeds 350 mW |
| MMSZ5242BT1G | 12 V Zener in SOD-123 package (3.7 × 1.6 mm); 500 mW rating; ±5% tolerance; no AEC-Q101 qualification | Non-automotive grade; larger size limits use in portable or automotive modules requiring space optimization | Choose for cost-sensitive industrial applications where AEC-Q101 is not required and board space permits |
Compared with BZX584-C12 and MMSZ5242BT1G, SZMM5Z12VT5G uniquely combines AEC-Q101 qualification, SOD-523 miniaturization, and full 500 mW rating-making it the only option qualified for automotive-grade 12 V clamping in space-constrained modules.
Availability
SZMM5Z12VT5G is available at Aetrix Electronics and suitable for battery protection circuits, USB port overvoltage clamps, and automotive sensor reference designs requiring stable component supply and long-term lifecycle support.
Supply support for SZMM5Z12VT5G 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 (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT markets.
SZMM5Z12VT5G belongs to the MM5ZxxxT1G/SZMM5ZxxxT1G series-designed specifically for miniaturized voltage regulation and ESD protection in portable, automotive, and high-density PCB applications.
FAQ
What is the Zener voltage tolerance for SZMM5Z12VT5G?
The SZMM5Z12VT5G has a standard tolerance of ±5%, with a specified Zener voltage range of 11.4 V to 12.7 V measured at IZT = 5 mA and TA = 25 °C. This tolerance remains valid across the full operating temperature range of −65 °C to +150 °C, as confirmed in the onsemi datasheet revision 19.
Is SZMM5Z12VT5G qualified for automotive applications?
Yes, SZMM5Z12VT5G is AEC-Q101 qualified and PPAP capable, with the "SZ" prefix explicitly indicating compliance for automotive and other applications requiring unique site and control change requirements. Its qualification covers thermal cycling, humidity testing, and mechanical shock per AEC-Q101 standards.
What is the maximum power dissipation of SZMM5Z12VT5G at 85 °C ambient?
At 85 °C ambient, SZMM5Z12VT5G's maximum power dissipation is 260 mW. This is calculated using the 4.0 mW/°C derating factor from the 500 mW rating at 25 °C: 500 mW − (85 − 25) × 4.0 mW = 260 mW, as specified in the Maximum Ratings table of the onsemi datasheet.
Does SZMM5Z12VT5G have a Pb-Free and RoHS-compliant construction?
Yes, SZMM5Z12VT5G uses 100% matte tin lead finish and void-free thermosetting plastic encapsulation meeting UL 94 V-0, and is fully Pb-Free and RoHS compliant per onsemi's documentation. The "G" suffix in the part number explicitly denotes Pb-Free packaging.
What is the reverse leakage current specification for SZMM5Z12VT5G?
SZMM5Z12VT5G specifies a maximum reverse leakage current (IR) of 0.1 μA at VR = 8.0 V and TA = 25 °C. This low leakage ensures minimal quiescent current draw in standby or monitoring configurations, supporting energy-efficient portable designs.
SZMM5Z12VT5G 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
SZMM5Z12VT5G FAQ
1.How can I place an order for SZMM5Z12VT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z12VT5G 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 SZMM5Z12VT5G reliable?
The price and inventory of SZMM5Z12VT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z12VT5G is usually 5 days.
3.What payment methods are accepted for SZMM5Z12VT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z12VT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z12VT5G?
SZMM5Z12VT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z12VT5G 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 SZMM5Z12VT5G?
For technical support, including SZMM5Z12VT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z12VT5G requirements.
6.How does Aetrix verify that SZMM5Z12VT5G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z12VT5G 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 SZMM5Z12VT5G meets industry standards.
7.What is the process for return or replacement of SZMM5Z12VT5G?
All SZMM5Z12VT5G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z12VT5G, 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 SZMM5Z12VT5G part is unused and in its original packaging.
Return procedure for SZMM5Z12VT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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