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onsemi SZMM3Z8V2ST1G
- Part No.:
- SZMM3Z8V2ST1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z8V2ST1G.pdf
- Description:
- DIODE ZENER 8.2V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:7,880
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Product details
Overview
SZMM3Z8V2ST1G from onsemi is a 500 mW, 8.2 V ±2.4% tolerance Zener diode in SOD−323 package, designed for precision voltage regulation and overvoltage protection in space-constrained PCBs. It delivers 135 pF capacitance at 0 V, 3.2 mV/°C temperature coefficient, and 0.7 µA reverse leakage at 6.5 V, enabling stable reference in portable power rails.
For engineers reviewing the SZMM3Z8V2ST1G datasheet, pinout, applications, or equivalent options, key selection criteria include tight VZ tolerance (±2.4%), low thermal resistance (250 °C/W with heatsink), AEC−Q101 qualification, and SOD−323 footprint compatibility with high-density layouts.
Technical Context
This Zener regulator operates in reverse breakdown mode with nominal test current IZT = 5.0 mA and maximum dynamic impedance ZZT = 160 Ω. Its low 0.9 V forward voltage at 10 mA supports bidirectional clamping verification during board-level testing.
The device features Class 3 ESD rating (>16 kV HBM), Pb−free/RoHS-compliant construction, and UL 94 V−0 flammability compliance. Thermal derating follows 4.0 mW/°C above 25°C on FR−4 with 38 mm² copper heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.02 V to 8.36 V at 5 mA - ensures stable 8.2 V reference with ±2.4% tolerance for precision biasing |
| Power Dissipation | 500 mW steady-state - supports continuous regulation in compact handheld PCBs without forced cooling |
| Zener Impedance (ZZT) | 160 Ω max at 5 mA - minimizes output voltage variation under load transients |
| Reverse Leakage (IR) | 0.7 µA max at 6.5 V - reduces quiescent current in battery-powered sleep modes |
| Capacitance (C) | 135 pF max at 0 V, 1 MHz - compatible with high-speed signal line clamping without bandwidth degradation |
| Temp Coefficient (dVZ/dT) | +3.2 mV/°C - enables predictable drift compensation in automotive ambient ranges |
| ESD Rating | Class 3 (>16 kV HBM) - withstands handling and assembly electrostatic events without parameter shift |
Pinout & Package
SOD−323 surface-mount package: 1.70 mm × 1.25 mm × 0.85 mm body, 0.9 mm height, cathode indicated by polarity band. Mountable in any orientation with 260°C soldering tolerance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased during Zener operation |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; defines polarity for clamp direction |
Key Features
| Feature | Design Value |
|---|---|
| Tight VZ tolerance | ±2.4% at 5 mA - eliminates post-assembly trimming in voltage reference circuits |
| AEC−Q101 qualification | Automotive-grade reliability with PPAP capability - suitable for under-hood and infotainment power domains |
| Low-profile SOD−323 | 0.85 mm max height - enables placement beneath connectors or shields in ultra-thin modules |
| Pb−free & RoHS | Halogen-free/BFR-free construction - meets global environmental compliance without performance trade-offs |
| High ESD robustness | 16 kV HBM - protects downstream ICs during hot-plug or field service without external TVS |
Applications
| Cellular Phone Power Rail Protection | USB-C Port Overvoltage Clamp |
|---|---|
Use Scenario: Protects PMIC input from transient surges during charger insertion or cable hot-swap. IC Role / Device Role / Timing Role: Zener clamping diode placed between VBUS and GND to shunt excess energy above 8.2 V. Use Value: 135 pF capacitance avoids signal integrity issues on 10 Gbps USB-C lanes while maintaining fast response to 100 ns spikes. | Use Scenario: Limits voltage on CC logic lines during adapter negotiation faults. IC Role / Device Role / Timing Role: Low-leakage (0.7 µA) Zener referenced to system ground to clamp CC line to safe logic-high threshold. Use Value: Tight ±2.4% VZ ensures reliable detection of 5 V USB PD contracts without false triggers. |
| Automotive Infotainment MCU Reference | Wearable Sensor Bias Supply |
Use Scenario: Provides stable 8.2 V reference for ADC voltage dividers in head-unit audio subsystems. IC Role / Device Role / Timing Role: Precision Zener used as secondary reference alongside LDO output to compensate for LDO dropout drift. Use Value: +3.2 mV/°C tempco matches typical LDO drift slope, enabling passive temperature-compensated references. | Use Scenario: Generates clean bias for MEMS microphone preamp in hearables with <5 mm PCB thickness. IC Role / Device Role / Timing Role: Compact SOD−323 Zener regulates mic bias rail from coin-cell source with minimal board area. Use Value: 0.9 mm height allows placement directly beneath microphone capsule without mechanical interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B8V2,215 | Same 8.2 V nominal, ±2% tolerance; SOD-323 package; 300 mW rating | Limited to industrial temp range (−65°C to +150°C vs. AEC−Q101 automotive qualified) | Select when automotive qualification is not required and lower power (300 mW) suffices |
| MMSZ5238BT1G | 8.2 V nominal, ±5% tolerance; SOD-123 package; 500 mW rating | Larger 2.9 mm × 1.3 mm footprint; no AEC−Q101 qualification | Select when board layout allows larger SOD-123 and tighter VZ tolerance is unnecessary |
Compared with BZX384-B8V2,215 and MMSZ5238BT1G, SZMM3Z8V2ST1G provides automotive-grade reliability, tighter ±2.4% VZ tolerance, and smallest SOD−323 footprint-making it optimal for safety-critical, space-constrained designs where parameter stability across temperature and lifetime is mandatory.
Availability
SZMM3Z8V2ST1G is available at Aetrix Electronics and suitable for cellular phone power rail protection, USB-C port overvoltage clamp, and automotive infotainment MCU reference requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZMM3Z8V2ST1G 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 MM3Z/SZMM3Z series targets high-reliability, miniaturized voltage regulation-specifically engineered for space-constrained portable electronics and automotive subsystems demanding AEC−Q101 compliance and tight parametric control.
FAQ
What is the Zener voltage tolerance of SZMM3Z8V2ST1G?
The SZMM3Z8V2ST1G has a Zener voltage tolerance of ±2.4%, specified as 8.02 V minimum to 8.36 V maximum at 5 mA test current. This tight tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet. The SZMM3Z8V2ST1G achieves this precision through process-controlled doping and post-package screening, making it suitable for applications requiring stable reference voltages without calibration.
Is SZMM3Z8V2ST1G qualified for automotive use?
Yes, SZMM3Z8V2ST1G is AEC−Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the onsemi datasheet. The "SZ" prefix denotes devices meeting automotive-specific site and control change requirements. This qualification covers temperature cycling, humidity testing, and mechanical shock per AEC standards-confirming suitability for under-dash and infotainment systems where the SZMM3Z8V2ST1G operates reliably from −65°C to +150°C.
What is the maximum reverse leakage current for SZMM3Z8V2ST1G?
The maximum reverse leakage current (IR) for SZMM3Z8V2ST1G is 0.7 µA at 6.5 V, per the Electrical Characteristics table on page 3 of the onsemi datasheet. This value is measured at TA = 25°C and reflects the device's low standby power consumption-critical for battery-operated devices where the SZMM3Z8V2ST1G serves as a voltage clamp or reference without draining reserve capacity.
Does SZMM3Z8V2ST1G have ESD protection built-in?
Yes, SZMM3Z8V2ST1G features an ESD rating of Class 3 (>16 kV) per Human Body Model, as documented in the "Specification Features" section of the onsemi datasheet. This intrinsic robustness eliminates the need for additional discrete ESD protection in many front-end clamp applications. The SZMM3Z8V2ST1G maintains its Zener parameters after exposure to 16 kV HBM events, verified during qualification testing.
What is the thermal resistance of SZMM3Z8V2ST1G with a heatsink?
The thermal resistance from junction-to-ambient (RJA) for SZMM3Z8V2ST1G is 250 °C/W when mounted on an FR−4 board with a 0.72 mm² pad and 38 mm² copper heatsink, per the "Maximum Ratings" table on page 2 of the onsemi datasheet. This value enables 500 mW power dissipation up to +125°C ambient-confirming the SZMM3Z8V2ST1G's suitability for thermally dense automotive and portable designs without active cooling.
SZMM3Z8V2ST1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 700 nA @ 5 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 A
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SZMM3Z8V2ST1G FAQ
1.How can I place an order for SZMM3Z8V2ST1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z8V2ST1G 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 SZMM3Z8V2ST1G reliable?
The price and inventory of SZMM3Z8V2ST1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z8V2ST1G is usually 5 days.
3.What payment methods are accepted for SZMM3Z8V2ST1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z8V2ST1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z8V2ST1G?
SZMM3Z8V2ST1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z8V2ST1G 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 SZMM3Z8V2ST1G?
For technical support, including SZMM3Z8V2ST1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z8V2ST1G requirements.
6.How does Aetrix verify that SZMM3Z8V2ST1G is sourced from the original manufacturer or authorized distributors?
All SZMM3Z8V2ST1G 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 SZMM3Z8V2ST1G meets industry standards.
7.What is the process for return or replacement of SZMM3Z8V2ST1G?
All SZMM3Z8V2ST1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z8V2ST1G, 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 SZMM3Z8V2ST1G part is unused and in its original packaging.
Return procedure for SZMM3Z8V2ST1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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