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onsemi SZMMSZ8V2ET1G
- Part No.:
- SZMMSZ8V2ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ8V2ET1G.pdf
- Description:
- DIODE ZENER 8.2V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:1,827
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Product details
Overview
SZMMSZ8V2ET1G from onsemi is a 500 mW, 8.2 V ±5% Zener voltage regulator diode in SOD-123 surface-mount package, designed for precision voltage reference and overvoltage protection in low-power analog circuits, power supply feedback loops, and automotive sensor signal conditioning. It delivers 15 Ω dynamic impedance at 5 mA test current, 0.7 µA reverse leakage at 6.6 V, and operates across −55 °C to +150 °C.
For engineers reviewing the SZMMSZ8V2ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener tolerance (±5%), thermal resistance (340 °C/W), AEC-Q101 qualification, ESD robustness (>16 kV HBM), and SOD-123 footprint compatibility with high-density PCB layouts.
Technical Context
This device functions as a two-terminal shunt regulator, maintaining stable output voltage by conducting reverse current above its specified Zener breakdown threshold. Its operation relies on controlled avalanche and Zener mechanisms depending on voltage range, with temperature coefficient optimized near zero crossing for 8.2 V nominal devices.
The SOD-123 package enables automated placement and reflow soldering per JEDEC standards, while its 1.60 × 2.69 × 1.16 mm outline supports compact designs. Thermal performance is characterized by 340 °C/W junction-to-ambient resistance on FR-5 board and 150 °C/W junction-to-lead resistance, enabling reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.79 V min / 8.2 V nom / 8.61 V max at IZT = 5 mA - defines regulation window under standard test conditions |
| Zener Impedance (ZZT) | 15 Ω max at IZT = 5 mA - determines output voltage stability under load transients |
| Reverse Leakage Current | 0.7 µA max at VR = 6.6 V - ensures minimal quiescent current in standby mode |
| Power Dissipation | 500 mW on FR-5 board at TL = 75 °C - sets maximum continuous DC power handling capability |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - guarantees robustness during handling and assembly |
| Operating Temperature | −55 °C to +150 °C - supports automotive under-hood and industrial control environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability and stress testing compliance |
Pinout & Package
Package: SOD-123 (Case 425, Style 1), 2-lead surface-mount plastic case with cathode band marking; dimensions 1.60 × 2.69 × 1.16 mm; Pb-free, UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener anode connection point | Connected to regulated voltage node; polarity band identifies this terminal for correct orientation during placement |
| 2 (Anode) | Zener cathode connection point | Connected to circuit ground or lower potential reference; completes shunt path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Automated assembly optimized | SOD-123 footprint conforms to IPC-7351B standard for pick-and-place accuracy and solder joint reliability |
| High-density packaging | Small 1.60 × 2.69 mm outline enables >2× component density vs. DO-35 through-hole alternatives |
| Stable voltage reference | ±5% tolerance and low 15 Ω ZZT ensure <±25 mV regulation error in feedback networks |
| Automotive-grade reliability | AEC-Q101 qualification confirms performance under temperature cycling, humidity, and mechanical shock stress |
| ESD-hardened design | Class 3 HBM rating eliminates need for external ESD protection in many sensor interface applications |
Applications
| Automotive Sensor Signal Conditioning | Industrial Power Supply Feedback |
|---|---|
Use Scenario: Stabilizing reference voltage for analog front-end circuits in engine control unit (ECU) temperature sensors. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 8.2 V bias for op-amp gain stages and ADC input scaling. Use Value: Maintains ±0.41 V regulation window across −40 °C to +125 °C ambient, ensuring consistent sensor linearity and offset calibration. |
Use Scenario: Setting output voltage in isolated flyback converter feedback loop using optocoupler-coupled TL431 replacement. IC Role / Device Role / Timing Role: Zener clamp defining secondary-side regulation threshold before optocoupler activation. Use Value: Low 15 Ω dynamic impedance minimizes output voltage drift under load step changes, improving transient response. |
| Portable Medical Device Protection | IoT Node Voltage Clamping |
Use Scenario: Overvoltage protection for lithium battery monitoring IC inputs in wearable health monitors. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping analog input pins to safe 8.2 V level during ESD events. Use Value: >16 kV HBM ESD rating prevents latch-up or damage without requiring additional TVS components. |
Use Scenario: Input rail clamping for ESP32-based environmental sensor nodes powered by USB or solar harvesters. IC Role / Device Role / Timing Role: Standby-mode voltage limiter preventing MCU brown-out during intermittent power surges. Use Value: 0.7 µA leakage at 6.6 V preserves battery life in always-on sensing applications with multi-year runtime targets. |
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 Zener voltage, ±5% tolerance, but rated at 300 mW and packaged in SOT-23 | Lower power rating limits use in higher-current regulation; SOT-23 footprint differs from SOD-123 | Select when board space allows SOT-23 and thermal budget permits reduced dissipation |
| MMSZ8V2ET1G | Identical electrical specs and SOD-123 package, but lacks AEC-Q101 qualification and SZ-prefix automotive traceability | Not approved for automotive production; suitable for commercial/industrial use only | Choose for cost-sensitive non-automotive designs where qualification documentation is not required |
Compared with SZMMSZ8V2ET1G, BZX84-C8V2 offers smaller footprint but lower power and no automotive qualification, while MMSZ8V2ET1G matches all electrical and mechanical specs but omits AEC-Q101 validation-making it viable only for non-automotive applications.
Availability
SZMMSZ8V2ET1G is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial power supply feedback loops, and portable medical device protection requiring stable component supply, AEC-Q101 compliance, and SOD-123 surface-mount compatibility.
Supply support for SZMMSZ8V2ET1G 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications, with focus on reliability and sustainability.
SZMMSZxxxET1G series belongs to onsemi's automotive-qualified Zener regulator portfolio, engineered specifically for voltage reference and overvoltage protection in harsh-environment electronic control units and safety-critical subsystems.
FAQ
What is the Zener voltage tolerance of SZMMSZ8V2ET1G?
The SZMMSZ8V2ET1G has a nominal Zener voltage of 8.2 V with a tolerance of ±5%, meaning the actual breakdown voltage falls between 7.79 V and 8.61 V when tested at 5 mA Zener current and 25 °C ambient temperature. This tolerance is confirmed in the Electrical Characteristics table on page 2 of the official onsemi datasheet, and applies across the full operating temperature range.
Is SZMMSZ8V2ET1G qualified for automotive applications?
Yes, SZMMSZ8V2ET1G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the onsemi datasheet. The "SZ" prefix denotes compliance with automotive-specific site and control change requirements, making it suitable for production use in engine control modules, body electronics, and ADAS sensor systems.
What is the maximum power dissipation for SZMMSZ8V2ET1G on FR-5 board?
SZMMSZ8V2ET1G is rated for 500 mW total power dissipation on FR-5 board at lead temperature (TL) = 75 °C, with derating of 6.7 mW/°C above that temperature. This value is specified in the Maximum Ratings table on page 1 of the onsemi datasheet and reflects real-world thermal performance under standard JEDEC test conditions.
Does SZMMSZ8V2ET1G have ESD protection built-in?
Yes, SZMMSZ8V2ET1G features an ESD rating of Class 3 (>16 kV) per the Human Body Model, as documented in the Specification Features section. This intrinsic robustness eliminates the need for discrete ESD protection diodes in many low-energy signal path applications such as sensor interfaces and microcontroller I/O clamping.
What is the reverse leakage current specification for SZMMSZ8V2ET1G?
The reverse leakage current for SZMMSZ8V2ET1G is specified as 0.7 µA maximum at VR = 6.6 V, per the Electrical Characteristics table on page 2 of the onsemi datasheet. This low leakage supports ultra-low-power operation in battery-powered IoT nodes and portable medical devices where standby current must be minimized.
SZMMSZ8V2ET1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
SZMMSZ8V2ET1G FAQ
1.How can I place an order for SZMMSZ8V2ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ8V2ET1G 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 SZMMSZ8V2ET1G reliable?
The price and inventory of SZMMSZ8V2ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ8V2ET1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ8V2ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ8V2ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ8V2ET1G?
SZMMSZ8V2ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ8V2ET1G 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 SZMMSZ8V2ET1G?
For technical support, including SZMMSZ8V2ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ8V2ET1G requirements.
6.How does Aetrix verify that SZMMSZ8V2ET1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ8V2ET1G 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 SZMMSZ8V2ET1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ8V2ET1G?
All SZMMSZ8V2ET1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ8V2ET1G, 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 SZMMSZ8V2ET1G part is unused and in its original packaging.
Return procedure for SZMMSZ8V2ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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