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onsemi MMSZ8V2T3G
- Part No.:
- MMSZ8V2T3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ8V2T3G.pdf
- Description:
- DIODE ZENER 8.2V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,995
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Product details
Overview
MMSZ8V2T3G from onsemi is a 500 mW, 8.2 V ±5% Zener voltage regulator diode in SOD−123 surface-mount package, rated for 75°C lead temperature, with 15 Ω dynamic impedance at 5 mA and 0.7 µA reverse leakage at 6.6 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog and power management circuits.
For engineers reviewing the MMSZ8V2T3G datasheet, pinout, applications, or equivalent options, this device is selected for stable 8.2 V regulation in space-constrained DC-DC feedback paths, microcontroller reset supervision, and ESD-protected sensor biasing where AEC−Q101 qualification, 16 kV HBM ESD rating, and Pb−Free compliance are required.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable reference voltage across its cathode–anode terminals under controlled current conditions. Its 15 Ω Zener impedance at IZT = 5 mA ensures minimal voltage deviation with load transients, while the −55°C to +150°C junction temperature range supports automotive and industrial environments.
The SOD−123 package delivers thermal resistance of 340°C/W (junction-to-ambient) and 150°C/W (junction-to-lead), enabling reliable 500 mW dissipation on FR−5 board when lead temperature is held ≤75°C. Its Class 3 ESD rating (>16 kV HBM) and AEC−Q101 qualification confirm suitability for harsh, high-reliability applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.79 V min / 8.2 V nominal / 8.61 V max at IZT = 5 mA - defines tight ±5% tolerance band for accurate voltage referencing |
| Zener Impedance (ZZT) | 15 Ω max at IZT = 5 mA - ensures low AC voltage variation under dynamic load changes |
| Reverse Leakage (IR) | 0.7 µA max at VR = 6.6 V - guarantees minimal quiescent current draw in standby circuits |
| Power Dissipation (PD) | 500 mW on FR−5 board at TL = 75°C - sets maximum continuous DC power handling before thermal derating |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - provides robust protection against handling and system-level electrostatic discharge |
| Junction Temp Range | −55°C to +150°C - enables operation in under-hood automotive, industrial control, and outdoor electronics |
Pinout & Package
SOD−123 surface-mount package: 2-terminal, cathode-indicated by polarity band, dimensions 1.60 × 2.69 × 1.16 mm, void-free thermosetting plastic case, UL 94 V−0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; reverse-biased during normal operation to clamp or reference |
| 2 (Anode) | Reference/ground terminal | Tied to circuit ground or lower-potential rail; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock |
| Pb−Free packaging | RoHS-compliant SOD−123 construction with corrosion-resistant, solderable finish and 260°C reflow compatibility |
| High-density footprint | Small 1.60 × 2.69 mm outline enables placement in compact PCB layouts without sacrificing thermal performance |
| Optimized for automated assembly | Marking and geometry conform to industry standards for pick-and-place accuracy and optical recognition |
Applications
| Automotive Sensor Biasing | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 8.2 V bias to analog front-end amplifiers in engine coolant temperature or pressure sensors. IC Role / Device Role / Timing Role: Zener voltage reference establishing precise operating point for signal conditioning circuitry. Use Value: Maintains sensor accuracy across −40°C to +125°C ambient with <±0.5% drift due to low TC and tight VZ tolerance. |
Use Scenario: Generating clean reset threshold for 3.3 V or 5 V microcontrollers during power-up and brownout events. IC Role / Device Role / Timing Role: Overvoltage clamp and reference element in RC-based reset generator networks. Use Value: Ensures deterministic reset assertion with sub-µA leakage, preventing spurious resets during low-power sleep modes. |
| Industrial Power Supply Feedback | ESD-Protected Signal Clamping |
Use Scenario: Setting reference voltage in secondary-side feedback loop of isolated DC-DC converters for telecom or PLC power modules. IC Role / Device Role / Timing Role: Precision shunt regulator defining output voltage setpoint via optocoupler interface. Use Value: Delivers 500 mW dissipation headroom and 15 Ω ZZT to minimize regulation error under line/load transients. |
Use Scenario: Protecting analog input pins of data acquisition ICs from transient overvoltage in factory automation I/O modules. IC Role / Device Role / Timing Role: Fast-acting bidirectional clamp (with series diode) limiting voltage excursions to ±8.2 V. Use Value: Leverages 16 kV HBM ESD rating and low leakage to suppress surges without loading sensitive signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C8V2 | Same 8.2 V nominal, ±5% tolerance, but SOT-23 package (higher RJA = 375°C/W) and 350 mW rating | Lower power handling and larger footprint; less suitable for high-density or automotive under-hood use | Select only if SOT-23 is already standardized in design and thermal margin >100 mW exists |
| MMSZ8V2T1G | Identical electrical specs and SOD−123 package, but supplied in 3,000-piece tape-and-reel vs. MMSZ8V2T3G's 10,000-piece reel | No functional difference; choice driven solely by procurement volume and logistics requirements | Prefer MMSZ8V2T3G for high-volume production to reduce changeover frequency and handling cost |
Compared with BZX84-C8V2 and MMSZ8V2T1G, the MMSZ8V2T3G offers superior thermal performance (500 mW vs. 350 mW), automotive qualification, and optimized supply-chain scalability-making it the preferred choice for new designs targeting reliability, density, and volume efficiency.
Availability
MMSZ8V2T3G is available at Aetrix Electronics and suitable for automotive sensor biasing, microcontroller reset generation, and industrial DC-DC feedback requiring stable component supply, AEC−Q101 compliance, and Pb−Free manufacturing readiness.
Supply support for MMSZ8V2T3G 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 MMSZxxxT1G/T3G series was developed specifically to provide AEC−Q101-qualified, high-reliability Zener regulators in miniature SOD−123 packages for space-constrained, thermally demanding automotive and industrial systems.
FAQ
What is the Zener voltage tolerance of MMSZ8V2T3G?
The MMSZ8V2T3G has a nominal Zener voltage of 8.2 V with a standard tolerance of ±5%, resulting in a guaranteed range of 7.79 V to 8.61 V at IZT = 5 mA and TA = 25°C. This tolerance is maintained across the full −55°C to +150°C operating junction temperature range, supporting precision voltage referencing in automotive and industrial environments where thermal stability is critical. The MMSZ8V2T3G datasheet specifies this tolerance explicitly in the Electrical Characteristics table.
Is MMSZ8V2T3G suitable for automotive applications?
Yes, the MMSZ8V2T3G is AEC−Q101 qualified and PPAP capable, confirming its suitability for automotive applications including engine control units, body electronics, and ADAS sensor modules. Its SOD−123 package meets automotive thermal and mechanical stress requirements, and its 16 kV HBM ESD rating exceeds typical automotive ESD immunity thresholds. The MMSZ8V2T3G is explicitly listed in onsemi's AEC−Q101 qualified product portfolio.
What is the maximum power dissipation of MMSZ8V2T3G on a standard PCB?
The MMSZ8V2T3G is rated for 500 mW total power dissipation on an FR−5 board at a lead temperature (TL) of 75°C. Above 75°C, power must be linearly derated at 6.7 mW/°C. This rating assumes proper copper pour and thermal relief design; actual dissipation depends on PCB layout, ambient temperature, and airflow. The MMSZ8V2T3G datasheet defines these limits in the Maximum Ratings table with test conditions clearly specified.
How does the Zener impedance of MMSZ8V2T3G affect circuit performance?
The MMSZ8V2T3G exhibits a maximum Zener impedance (ZZT) of 15 Ω at IZT = 5 mA, meaning that a 1 mA change in Zener current causes less than 15 mV shift in regulated voltage. This low dynamic impedance ensures stable reference voltage under varying load or ripple conditions-critical in feedback loops and precision biasing. The MMSZ8V2T3G's ZZT is measured at 1 kHz with 0.1×DC current, per JEDEC-standard methodology.
What marking code identifies MMSZ8V2T3G on the SOD−123 package?
The MMSZ8V2T3G is marked on the SOD−123 package with the code "V4", as confirmed in the Electrical Characteristics table on page 2 of the official onsemi datasheet. The "V4" marking appears adjacent to the cathode polarity band, and the "G" suffix denotes Pb−Free compliance. Date code and microdot location follow onsemi's generic SOD−123 marking diagram, with no additional alphanumeric characters required for identification of the MMSZ8V2T3G.
MMSZ8V2T3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 700 nA @ 5 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ8V2T3G FAQ
1.How can I place an order for MMSZ8V2T3G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ8V2T3G 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 MMSZ8V2T3G reliable?
The price and inventory of MMSZ8V2T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ8V2T3G is usually 5 days.
3.What payment methods are accepted for MMSZ8V2T3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ8V2T3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ8V2T3G?
MMSZ8V2T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ8V2T3G 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 MMSZ8V2T3G?
For technical support, including MMSZ8V2T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ8V2T3G requirements.
6.How does Aetrix verify that MMSZ8V2T3G is sourced from the original manufacturer or authorized distributors?
All MMSZ8V2T3G 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 MMSZ8V2T3G meets industry standards.
7.What is the process for return or replacement of MMSZ8V2T3G?
All MMSZ8V2T3G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ8V2T3G, 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 MMSZ8V2T3G part is unused and in its original packaging.
Return procedure for MMSZ8V2T3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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